® VT 275 V6 ENGINE model year 2005
FORWARD This publication is intended to provide technicians and service personnel with an overview of technical features of the International® VT 275 Diesel Engine. The information contained in this publication will supplement information contained in available service literature. Consult the latest SERVICE and DIAGNOSTIC manuals before conducting any service or repairs.
TABLE OF CONTENTS OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 DESIGN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 ELECTRONIC CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 AIR MANAGEMENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INJECTION TURBOCHARGED DIESEL ENGINE VT 275 FEATURES • • • • • • • • • 90° V6 Offset Crankpins Rear Gear Train Primary Balancer Regulated Two-Stage Turbocharging System Four Valves per Cylinder Cooled Exhaust Gas Recirculation Electro-Hydraulic Generation 2 Fuel Injection System Top Mounted Oil and Fuel Filters International® VT 275 V6 Engine 5
VT 275 OVERVIEW VT 275 ENGINE SPECIFICATIONS Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-stroke, direct injection diesel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . V6, pushrod operated four valves / cylinder Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 cu. in. (4.5 liters) Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VT 275 OVERVIEW Engine Serial Number • The Engine Serial Number (ESN) for the VT 275 is located on a machined surface at the left rear corner of the crankcase just below the cylinder head. • The ESN identifies the engine family, the build location, and the sequential build number. • Engine Serial Number Example 4.5HM2Y0135617 4.
COMPONENT LOCATIONS - FRONT OF ENGINE HEATER SUPPLY TUBE AIR INLET HEATER SMOOTH IDLER PULLEY AIR INLET FUEL TUBE TO RIGHT BANK MAT SENSOR BANJO BOLT WITH CHECK VALVE POWER STEERING PUMP BRACKET BELT TENSIONER OIL PUMP COVER 8 INTAKE MANIFOLD International® VT 275 V6 Engine
COMPONENT LOCATIONS - LEFT FRONT OF ENGINE GROOVED IDLER PULLEY BREATHER HEATER RETURN TUBE COOLANT OUTLET SMOOTH IDLER PULLEY International® VT 275 V6 Engine 9
COMPONENT LOCATIONS - LEFT SIDE OF ENGINE AIR INLET DUCT OIL LEVEL GAUGE LEFT BANK GLOW PLUGS CMP SENSOR SUPPLY FROM FUEL PUMP AND PRIMARY FILTER FUEL RETURN TO TANK 10 International® VT 275 V6 Engine
COMPONENT LOCATIONS - LEFT REAR OF ENGINE LIFTING EYES IPR AND HEAT SHIELD LEFT BANK EXHAUST MANIFOLD REAR COVER International® VT 275 V6 Engine 11
COMPONENT LOCATIONS - REAR OF ENGINE OIL FILTER HOUSING FUEL FILTER HOUSING TURBINE OUTLET EXHAUST TUBE ASSEMBLY HIGH PRESSURE PUMP COVER 12 International® VT 275 V6 Engine
COMPONENT LOCATIONS - RIGHT REAR OF ENGINE HIGH PRESSURE COMPRESSOR HOUSING COOLANT HEATER UPPER OIL PAN LOWER OIL PAN International® VT 275 V6 Engine 13
COMPONENT LOCATIONS - RIGHT SIDE OF ENGINE OUTLET TO CHARGE AIR COOLER TURBOCHARGER CROSSOVER TUBE ICP SENSOR RIGHT BANK GLOW PLUGS CRANKCASE CKP SENSOR LOWER CRANKCASE 14 International® VT 275 V6 Engine
COMPONENT LOCATIONS - RIGHT FRONT OF ENGINE PNEUMATIC ACTUATOR BOOST CONTROL SOLENOID MAP SENSOR ECT SENSOR WATER PUMP PULLEY AND FAN DRIVE International® VT 275 V6 Engine 15
COMPONENT LOCATIONS - TOP OF ENGINE WITHOUT HARNESS HIGH PRESSURE PUMP INJECTOR CONNECTORS HIGH PRESSURE TURBINE HOUSING TURBOCHARGER OIL SUPPLY LINE EOP SWITCH EOT SENSOR EGR VALVE LOW PRESSURE TURBO COMPRESSOR HOUSING 16 International® VT 275 V6 Engine
COMPONENT LOCATIONS - TOP OF ENGINE WITH HARNESS MAF SENSOR CONNECTOR (SENSOR NOT SHOWN) INJECTOR HARNESS CONNECTOR HARNESS TO CHASSIS MOUNTED ECM/IDM BOOST CONTROL SOLENOID ALTERNATOR FUSIBLE LINKS (ALTERNATOR NOT SHOWN) International® VT 275 V6 Engine 17
VT 275 DESIGN FEATURES ROCKER ARM Cylinder Head Assembly • The VT 275 has an aluminum rocker arm carrier for each cylinder head. The carrier holds the fulcrum plates and the attached rocker arms and can be removed as an assembly from the cylinder head without removing the rocker arms. ROCKER ARM CARRIER • Each rocker arm pivots on a steel ball located by detents in the fulcrum plate.
VT 275 DESIGN FEATURES Crankcase Assembly 14mm MAIN BEARING BOLTS LOWER CRANKCASE • The VT 275 has four main bearings but replaces the traditional individual main bearing caps with a one-piece lower crankcase assembly. The lower crankcase is made of cast iron and is stronger than the individual caps. The lower crankcase is attached to the crankcase with sixteen 14mm main bearing bolts of two lengths with the shorter bolts to the outside. Three additional 8mm bolts are used on each side at the perimeter.
VT 275 DESIGN FEATURES HIGH PRESSURE OIL PUMP GEAR Rear Gear Train • The VT 275 gear train is located at the rear of the engine. The crankshaft gear is a press fit on the crankshaft and drives the camshaft gear directly. The crankshaft flange with integral gear is pressed on the end of the crankshaft then clamped with six 12mm bolts. The camshaft gear must be timed to the crankshaft gear during assembly to maintain the correct relationship.
VT 275 DESIGN FEATURES Offset Crankpins • The 4-stroke engine requires 720° of crankshaft rotation to complete all four strokes of the cycle. In a multi-cylinder engine dividing the 720 degrees by the number of cylinders will equal the ideal crankshaft rotation between combustion events in the firing order. The VT 275 achieves equal spacing of the combustion events by splitting the crankpins and staggering the individual journals 30º.
® ELECTRONIC CONTROL SYSTEM • • • • ECM and IDM control system Dual magnetic pick-up timing sensors Electric motor driven EGR valve ECM boost control System Features ECM IDM • The VT 275 engine uses the Diamond Logic™ II Control System. The electronic control system features an Engine Control Module (ECM) and an Injector Drive Module (IDM). • The Exhaust Gas Recirculation (EGR) valve is positioned by an ECM controlled electric stepper motor.
ELECTRONIC CONTROL SYSTEM ECM • The ECM uses sensor inputs to control the Injection Pressure Regulator (IPR), the EGR valve, the boost control solenoid, the glow plug relay and the inlet air heater relay. The ECM also shares sensor data with the IDM over communication links between the two modules. INLET AIR HEATER RELAY GLOW PLUG RELAY CONTROL MODULE ASSEMBLY BRACKET • The IDM is mounted on brackets cast into the ECM.
ELECTRONIC CONTROL SYSTEM EGR Drive Module • The EGR Drive Module is mounted below the de-aeration tank. The module receives the desired EGR valve position from the ECM over the engine CAN 2 link. The module then sends a series of voltage and ground signals to the Motor U, V, and W terminals of the EGR valve. The voltage signals are Pulse Width Modulated (PWM) to control current flow to the motor field coils. • The module receives battery voltage and ground through the 12-way engine-tochassis connector.
ELECTRONIC CONTROL SYSTEM Inlet Air Heater Relay • The Inlet Air Heater (IAH) element is used to improve cold start operation, reduce emissions and white smoke, and improve engine warm-up. The relay is mounted next to the Power Distribution Center and is the taller of the two relays. The IAH relay receives battery power from the starter power-feed terminal and the normally open terminal connects to the element through the harness. One end of the relay coil is grounded through the engine 12-way connector.
ELECTRONIC CONTROL SYSTEM NOT USED Boost Control Solenoid GREEN HOSE TO AIR INLET DUCT • The turbocharger boost control solenoid valve is controlled by the ECM. When the ECM signal to the Boost Control solenoid is high, the valve opens, allowing pressure in the pneumatic actuator to vent into the turbo inlet duct. When the ECM signal is low, the valve closes, and pressure to the actuator equals boost pressure in the intake manifold.
ELECTRONIC CONTROL SYSTEM PDC# Device F4 F12 30A...IDM/ECM 20A...RUN/ACC F41 F46 10A...ECM PWR 5A...ECM KEY PWR R1 X1 X2 ECM X3 X4 X3-3 VIGN X3-5 ECM MPR X4-1 ECM PWR X4-2 ECM PWR ECM RELAY - POSITION 50 PDC 200 A F4 TO IDM RELAY F41 R1 3 5 1 2 TO ENGINE INLINE 12-WAY BATTERY F-46 STARTER MOTOR RELAY KEY SWITCH F-12 ECM Relay Circuit Operation • The ECM controls its own power up and power down process. When the key is OFF, the ECM stays powered up for a brief period.
ELECTRONIC CONTROL SYSTEM PDC# F4 F12 F40 F46 R2 Device X3-8 IDM LOGIC POWER X3-24 IDM MAIN POWER X3-25 IDM MAIN POWER X3-4 IDM MAIN POWER X3-23 IDM MAIN POWER X3-27 IDM MPR X3-7 VIGN 30A...IDM/ECM 20A...RUN/ACC 10A...IDM LOGIC 5A...
ELECTRONIC CONTROL SYSTEM RIGHT BANK INJECTORS X1 MAF / IAT X2 LEFT BANK INJECTORS X3 E D C B A IAT X1-7 IAT IDM X1 X1-6 GRD X2 X1-8 ECT ECT X3 X2-1 EOT X4 IAH RELAY X2-14 MAT EGR DRIVE MODULE ECM VOLTAGE EOT R1 R2 SENSOR R2 ECM MICROPROCESSOR MAT Temperature Sensor Operation • There are four, two-wire temperature sensors on the VT 275 engine. Each sensor contains a resistor whose value varies depending on temperature.
ELECTRONIC CONTROL SYSTEM RIGHT BANK INJECTORS X1 X2 LEFT BANK INJECTORS X3 X1-6 GRD IDM X1 X1-13 EOPS X2 X1-14 VREF X3 EOPS X4 X1-20 ICP EGR DRIVE MODULE X2-3 MAP ECM Functional Equivelant ECM SENSOR ICP MICROPROCESSOR BCS MAP Pressure Sensor Operation • The Manifold Absolute Pressure (MAP) sensor, the Injection Control Pressure (ICP) sensor and the Engine Oil Pressure Switch (EOPS) are used to send pressure information to the ECM. • The MAP and ICP are three-wire pressure sensors.
ELECTRONIC CONTROL SYSTEM RIGHT BANK INJECTORS X1 LEFT BANK INJECTORS CKPO X3-5 X2 CMPO X3-10 X3 CKP (+) X1-1 X1 X2 CKP (-) X1-2 CMP (+) X1-9 X3 X4 CMP (-) X1-10 CKPO X1-19 IDM CRANKSHAFT POSITION SENSOR CMPO X1-24 ECM CAMSHAFT POSITION SENSOR 1 + 2 + - Magnetic Pick-Up Sensors • The Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor are both magnetic pick-up type sensors. Each sensor contains a permanent magnet core surrounded by a coil of wire.
ELECTRONIC CONTROL SYSTEM X1-17 GPC X1 X2 2 4 6 X1-21 GPD X3 X4 GLOW PLUGS BAP ECM BATTERY GPC 200 A GPD ECT 1 3 5 N.O. TERMINAL IAH RELAY STARTER IAH GLOW PLUG RELAY 4 12-WAY ENGINE TO CHASSIS CONNECTOR Glow Plug System • The VT 275 uses glow plugs to aid cold starts. The ECM turns on the glow plugs prior to engine cranking to increase the temperature of the cylinders. Glow plug operation is controlled by the ECM through the glow plug relay.
ELECTRONIC CONTROL SYSTEM X1-18 IAHC X1 X2 X2-11 IAHD X3 X4 MAF / IAT BAP ECM BATTERY IAHC 200 A IAHD EOT N.O. TERMINAL IAH RELAY STARTER IAH 4 12-WAY ENGINE TO CHASSIS CONNECTOR Inlet Air Heater Operation • The VT 275 has an Inlet Air Heater (IAH) element mounted in the front of the intake manifold. The IAH is used to improve cold start operation, reduce emissions and white smoke, and improve engine warm-up.
ELECTRONIC CONTROL SYSTEM ECM MAF MICROPROCESSOR B+ SIG RIGHT BANK INJECTORS X1 LEFT BANK INJECTORS X2 VREF SIGNAL CONTROL B+ X3 THERMISTOR HEATED ELEMENT FIXED RESISTOR X1-7 IAT GRD X1-6 IAT SIG GRD X1 X2-2 MAF X2 X3 FIXED RESISTOR X4 MAF / IAT A KEY PWR 4 9 ENGINE IN-LINE 12-WAY CONNECTOR IAT B SIGNAL GRD C ACTUATOR GRD D KEY POWER MAF SIGNAL EGR DRIVE MODULE ECM ACT GRD E IDM BCS IPR Mass Air Flow (MAF) Sensor • The MAF sensor is used to measure the mass of the fresh ai
ELECTRONIC CONTROL SYSTEM PDC# X1 X2 X3 X4 F11 F19 X3-1 WIF Device 20A...FUEL PUMP 20A...FUEL HEATER X4-15 FPM X3-9 FPC PDC ECM 2 5 TO IGNITION POWER FUEL PUMP RELAY 1 1 TO RUN / ACC RELAY BATTERY HFCM 3 F11 2 200 A 2 F19 HEATER 1 2 2 5 PUMP 1 FUEL HEATER RELAY 1 3 TO KEY SWITCH Pump Operation • The VT 275 has an ECM controlled chassis mounted electric fuel pump. At key-on, the ECM will operate the fuel pump for up to 60 seconds to prime the system.
ELECTRONIC CONTROL SYSTEM IN CAB CRUISE SWITCHES RIGHT BANK INJECTORS X1 LEFT BANK INJECTORS X2 X3 X4-6 COO BAP ECM IDM X3-14 RAS X3-21 SCS X3-24 BAP X4-18 APS X4-24 GRD X1 X2 X3 X4 EGR DRIVE MODULE A X4-4 VREF B B X4-12 IVS C E APS / IVS D PDC F TO KEY SWITCH BCS F46 PDC# F46 Device Accelerator Pedal Position Sensor / Idle Validation Switch (APS/IVS) • The APS/IVS sensor has two components built into one housing: the Accelerator Pedal Position Sensor (APS) and the Idle Validation Swit
ELECTRONIC CONTROL SYSTEM EGR DRIVE MODULE POWER ECM GRD X1 POWER X1 GRD X2 X2-13 X3-31 X2-6 X3-30 X2 5 2 3 4 1 6 7 8 X3 X3 W V U X4 X2-12 SHD IDM S N S N N S S N N S N S EGR VALVE EGR DRIVE MODULE TO FRAME GROUND TO ECM RELAY ‘NORMALLY OPEN’ TERMINAL 10 4 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 SENSOR GRD POSITION SENSOR W POSITION SENSOR V POSITION SENSOR U SENSOR 5V SUPPLY EGR VALVE SHIELD DRAIN MOTOR W MOTOR V MOTOR U CAN2CAN2+ GRD ACT PWR ENGINE IN-LINE RELAY EGR System • The
ELECTRONIC CONTROL SYSTEM X1 X2 X1-19 CKPO X3-5 X1-24 CMPO X3-10 X2-6 CAN 2 (+) X3-30 X2-13 CAN 2 (-) X3-31 X3 X3-12 CAN 1 (+) X4 X3-13 CAN 1 (-) X3-28 X3-29 2 3 X1 X2 X3 ENGINE IN-LINE 12-WAY CONNECTOR X4-20 ATA (+) X4-21 ATA (-) IDM ECM TO TRANS CONTROLLER D C 4 3 F G EGR DRIVE MODULE ECM/IDM Communications • The ECM and IDM communicate over three independent communication links. The three links are CMPO, CKPO, and CAN 2.
ELECTRONIC CONTROL SYSTEM FUNCTION SELECTOR SWITCH X1 X2 ECT CANCAN1+ 1(+) X3-10 AC DEMAND X3 CAN1CAN 1(-) X4 X3-22 AC CONTROL CMP HPSW ECM LPSW TO IGN SW T-STAT SW h PDC 5 A/C CLUTCH RELAY 7 APS TO TRANS CONTROLLER A/C CLUTCH 1 3 2 5 1 2 C A BATTERY GRD TO BATTERY POSITIVE • The VT 275 ECM controls the A/C clutch. The ECM receives an A/C demand signal from the chassis, and engages the A/C clutch if engine conditions are correct.
® Air Management System • Regulated two-stage turbocharger • Cooled exhaust gas recirculation • Intake air heater Inlet air Compressed air Exhaust gas Crankcase vapors Charge Air Cooler (CAC) System Features Air filter MAF/IAT sensor Dual stage turbocharger Normal exhaust flow bypass shut Exhaust flow bypass open IAH MAP Exhaust system Left exhaust manifold Left cylinder MAT head Left exhaust in Right exhaust in Right cylinder Right exhaust head manifold EGR valve Intake manifold EGR cooler Exh
AIR MANAGEMENT SYSTEM FROM CHARGE AIR COOLER (CAC) EGR VALVE LOW PRESSURE COMPRESSOR INLET BOOST CONTROL SOLENOID PNEUMATIC ACTUATOR INTAKE MANIFOLD COMPRESSOR OUTLET TO CHARGE AIR COOLER (CAC) LOW PRESSURE TURBINE OUTLET EXHAUST TUBE ASSEMBLY System Operation compressor flows through the crossover tube to the compressor inlet of the high-pressure turbocharger. Air from the compressor goes to the Charge Air Cooler (CAC).
AIR MANAGEMENT SYSTEM Air Filter Restriction Gauge • The filter restriction gauge is mounted on the air filter housing. The gauge allows the operator to check the condition without removing the filter. The restriction gauge can be reset by pushing the yellow button on the end. FILTER RESTRICTION GAUGE • Note: The filter restriction gauge bellows will lock in position if restriction exceeds 26 inches of water. The filter should be replaced and the gauge reset.
AIR MANAGEMENT SYSTEM FROM AIR FILTER LOW PRESSURE COMPRESSOR HOUSING PNEUMATIC ACTUATOR TO CAC HIGH PRESSURE TURBINE HOUSING LOW PRESSURE TURBINE HOUSING HIGH PRESSURE COMPRESSOR HOUSING EXHAUST INLET TO HIGH PRESSURE TURBINE EXHAUST OUTLET Two-Stage Regulated Turbocharger • The dual turbocharger consists of two turbochargers in series. The high pressure turbocharger is the smaller unit and is configured to provide boost at low speeds and loads.
AIR MANAGEMENT SYSTEM Exhaust Bypass Valve • The path that exhaust takes through the twin turbochargers is affected by the position of the exhaust bypass valve located under the metal plate on the top of the high-pressure turbine housing. With the bypass valve open, a portion of the exhaust enters the low-pressure turbine housing directly, bypassing the highpressure turbine.
AIR MANAGEMENT SYSTEM Turbocharger Actuator • The pneumatic actuator for the bypass valve receives intake manifold boost pressure from the intake elbow through a plastic tube. When the Pulse Width Modulated (PWM) signal to the boost control solenoid is 100%, the valve is open, and the boost pressure is vented to the inlet duct. With boost vented, the pneumatic actuator will be in the relaxed position.
AIR MANAGEMENT SYSTEM Turbocharger Crossover Tube CROSSOVER TUBE O-RING • Air from the low-pressure turbocharger compressor outlet is routed to the highpressure turbocharger compressor inlet through the crossover tube. The crossover tube is sealed at the inlet of the high pressure turbocharger with an O-ring and at the low pressure compressor discharge with a press-in seal. If the crossover tube is removed, the seal and O-ring must be replaced.
AIR MANAGEMENT SYSTEM EGR Valve • The EGR valve consists of a stepper motor and two poppet valves connected by a common shaft. When inserted into the manifold, the valve aligns with the port in the intake manifold that connects to the EGR cooler. When the valve is open, exhaust gases flow from the cooler and enter the manifold through the open poppet valves. STEPPER MOTOR HOUSING COMMON SHAFT • The EGR valve opens when the ECM commands the EGR drive module to position the valve.
® FUEL SUPPLY SYSTEM • • • • • Chassis-mounted electric fuel pump Water-in-fuel detection Electric fuel heater Chassis-mounted primary fuel filter Engine-mounted secondary fuel filter element System Features SECONDARY FUEL FILTER HOUSING • The VT 275 uses a chassis-mounted electric fuel pump. The pump is mounted with the fuel heater and primary filter in the Horizontal Fuel Conditioning Module (HFCM).
FUEL SUPPLY SYSTEM Secondary fuel filter Unfiltered fuel from the fuel tank Conditioned fuel from HFCM to fuel filter Conditioned fuel from fuel filter Fuel pressure test port Cylinder heads Fuel return from engine to HFCM Fuel return to tank Fuel injectors Fuel supply to HFCM Primary fuel filter Fuel supply to engine HFCM Drilled passage Drilled passage Check valve in banjo bolt Check valve in banjo bolt Fuel tank System Operation • The fuel pump, fuel heater, pressure relief valve, Water-in-
FUEL SUPPLY SYSTEM Horizontal Fuel Conditioning Module (HFCM) COVER PRESSURE TO SECONDARY FILTER WIF CONNECTOR DRAIN PLUG PUMP CONNECTOR SUCTION SIDE RECIRCULATION CONTROL VALVE FUEL PUMP FILTER HEATER HEATER CONNECTOR 50 International® VT 275 V6 Engine • The HFCM is chassis mounted on CF500 and CF600 trucks. The module is mounted on the inside of the left frame rail behind the cab. The module is mounted with the cover/mount facing the rail.
FUEL SUPPLY SYSTEM FILTER ELEMENT Secondary Fuel Filter • The secondary filter is a top-loaded, engine-mounted fuel filter. Fuel enters the filter housing under pressure from the fuel pump through the inlet line and banjo bolt. Fuel passes through the 4-micron filter element and through the filter stand pipe to enter the two fuel lines to the cylinder heads. • The filter standpipe contains a valve that is opened by the filter when it is installed in the housing.
® FUEL MANAGEMENT SYSTEM • • • • Electro-hydraulic injectors Crankcase integrated high-pressure reservoir Gear driven rear mounted high-pressure pump Rail mounted ICP sensor System Features RESERVOIR INJECTOR HIGH PRESSURE PUMP ICP SENSOR HIGH PRESSURE OIL RAIL CASE-TO-HEAD TUBE REAR OF ENGINE 52 International® VT 275 V6 Engine • The VT 275 engine uses electrohydraulic injectors.
FUEL MANAGEMENT SYSTEM FUEL MANAGEMENT SYSTEM IDM ECM CMP CKP EOPS MAP APS / IVS INJECTION CONTROL PRESSURE (ICP) SYSTEM MAF / IAT LUBRICATION SYSTEM BAP ECT FUEL SUPPLY SYSTEM MAT EOT ICP High-pressure oil Fuel Electronic circuit Lube oil pressure System Operation • The high-pressure oil system is composed of the reservoir, highpressure pump, injection pressure regulator, rear branch tube, case-tohead tubes, high-pressure rails and the injection control pressure sensor.
FUEL MANAGEMENT SYSTEM Oil Reservoir RESERVOIR SCREEN HIGH PRESSURE PUMP RESERVOIR • The reservoir for the high-pressure pump is cast into the front of the crankcase Vee. The reservoir receives oil under pressure from the crankshaft driven lube oil pump. The reservoir holds approximately one quart (one liter) of oil. • A raised cavity in the bottom of the reservoir feeds oil from the reservoir to the high-pressure pump.
FUEL MANAGEMENT SYSTEM Injection Control Pressure Sensor • The Injection Control Pressure (ICP) sensor mounts on the right bank highpressure rail but protrudes through the valve cover and is accessible without removing the valve cover. • The sensor measures pressure in the rail and produces a signal that is sent to the ECM. The ICP sensor is the feedback device for the operation of the IPR. The ECM constantly checks the pressure to determine if the system is performing correctly.
® INJECTOR OPERATION • • • • • • Electro-hydraulic Two control coils Spool valve controlled inlet 48 volt operation short coil on-time self extracting clamps Fuel Injector Features • The VT 275 fuel system uses electro-hydraulic injectors. The injectors utilize lube oil pressurized by the high-pressure pump to provide the mechanical force needed to inject fuel into the cylinders. Each injector has two coils.
INJECTOR OPERATION OIL INLET FROM RAIL Spool Valve • The open and close coils move the spool valve from side to side using magnetic force. • The spool valve has two positions. When the valve is in the open position, oil flows from the high pressure oil rail into the injector. When the valve is in the closed position, oil drains from the injector back to the crankcase.
INJECTOR OPERATION Fill • During the fill stage, the spool valve is in the closed position. High pressure oil from the oil rail cannot pass through the spool valve. • Low pressure fuel passes through the fuel inlet check valve and fills the plunger cavity. • The needle control spring holds the needle on its seat so that fuel cannot enter the combustion chamber.
INJECTOR OPERATION End of injection • When the injector drive module determines that the correct amount of fuel has been delivered, it sends a current to the close-coil of the injector. The spool valve closes, and high pressure oil flow into the injector stops. • Oil above the intensifier piston flows past the spool valve through the exhaust ports out into the valve cover area. The intensifier piston and plunger return under spring pressure to the fill position.
® LUBRICATION SYSTEM • • • • • Crankshaft driven lube oil pump Integrated oil cooler External oil pressure regulator Easy access canister oil filter Piston cooling jets System Features OIL FILTER ADAPTER • The crankshaft driven oil pump is located behind the vibration damper and is integrated into the front cover. • The oil pressure regulator valve is located in the front cover below the oil pump and is accessed by removing the pressure regulator end plug.
LUBRICATION SYSTEM Diagnostic EOPS port Oil filter EOT Primary balancer bushing Filter bypass Cam Main bushing bearing Rod bearing Lifter Dual turbocharger Piston Cooling tube To oil pan Oil cooler Cooler bypass Oil reservoir for high-pressure pump 0.95 qts To high-pressure oil system Oil Pump Pump regulator 75 psi System Operation • Oil is drawn from the oil pan through the pick-up tube, upper oil pan, lower crankcase and the front cover passage that leads to the oil pump gear set.
LUBRICATION SYSTEM LOWER PAN Upper and Lower Oil Pan • The VT 275 uses a two-piece oil pan. The upper oil pan is cast aluminum and serves to adapt the lower sheet metal pan to the crankcase. The upper pan also serves as a baffle to keep oil in the pan away from the crankshaft. PICK-UP TUBE UPPER PAN • The pick-up tube bolts to the upper oil pan. The upper pan has a cast passage that connects the pick-up tube to the lower crankcase. • The upper pan is sealed on both sides with a push-in-place gasket.
LUBRICATION SYSTEM Gerotor Pump • The gerotor style oil pump is integrated into the front cover with the gear set driven off two flats on the nose of the crankshaft. The gear set rides directly on the surface of the crankcase front cover. DOWEL PIN COVER • The gears are a matched set, and should be marked before disassembly so they can be reassembled with the same side facing out. • The oil pump front cover is located with two dowel pins and sealed with a press-inplace gasket.
LUBRICATION SYSTEM OIL COOLER COVER Oil Cooler • The stacked-plate type oil cooler is mounted to the bottom of the oil cooler cover. When the cooler cover is set in place on the crankcase, the cooler sets in the high-pressure oil reservoir. The water pump circulates coolant through the cooler to remove excess heat from the engine oil.
LUBRICATION SYSTEM Oil Filter FILTER LID • The VT 275 uses a cartridge style oil filter located on top of the engine. FILTER ELEMENT • When the oil filter is removed, the oil filter drain valve opens to allow oil to drain from the filter housing, through the adapter, and back to the oil pan. The oil filter element snaps onto the lid. This allows the filter element to be extracted without contact with the element.
LUBRICATION SYSTEM Oil Filter Base and Valves • Oil enters the filter base from the oil cooler through the anti-drain back valve. The valve is not spring loaded; instead the valve closes under its own weight when the engine is shut off. This keeps the oil in the filter housing from draining back into the lube system. • The oil cooler bypass valve is in the filter base. This valve allows the oil to bypass the cooler when cooler inlet pressure is 25 psi higher than the unfiltered side of the oil filter.
LUBRICATION SYSTEM Turbocharger Feed Line TURBOCHARGER OIL LINE SUPPLY • Pressurized oil from the filtered passage in the oil-filter adapter is supplied to each center section of the twin turbocharger. The oil is transferred through a hose to the turbocharger. • The turbocharger ends of the hose are sealed with face seals. The oil filter adapter end of the hose pushes into a cavity on the filter adapter and is sealed with O-rings and retained by a single cap screw.
® COOLING SYSTEM • • • • Modular water pump Stainless steel injector sleeves Stainless steel glow plug sleeves Extended life coolant System Features and Flow • The modular water pump mounts in the front cover and draws coolant from the radiator via the coolant inlet on the front cover. The water pump pushes coolant through two ports on the front cover to matching ports on the crankcase. Coolant flows through the crankcase and cylinder passages, then returns to the front cover.
COOLING SYSTEM Front Cover Flow • Coolant is drawn into the water inlet by the water pump. Coolant is discharged from the pump to the crankcase coolant jackets. Coolant is also routed from the front cover through a crankcase passage to the oil cooler cover. FROM THE INTAKE MANIFOLD HEATER SUPPLY TO RADIATOR HEATER RETURN • Return coolant from the crankcase coolant jackets is directed to the thermostat by the front cover. If the thermostat is open, coolant flows to the radiator to be cooled.
COOLING SYSTEM EGR Cooler Flow • Coolant flow from the oil cooler is directed through the cooler cover to the intake manifold. Coolant flows from the manifold into the EGR cooler then back into the manifold to return to the front cover. • The EGR cooler is used to reduce the temperature of the exhaust before it reaches the EGR valve. EGR Cooler Seal EGR COOLER SEAL O-RING • The intake manifold fits over the oil cooler cover outlet to receive coolant flow from the oil cooler.
COOLING SYSTEM Service Intervals • The VT 275 is designed to use Extended Life Coolants. Service Intervals for the VT 275 Engine • Extended life coolant can be identified by its red/orange color in contrast to conventional green or blue antifreeze. Change Oil and Filter • The service interval is 5 years, 300,000 miles or 12,000 hours if the chemical extender is added at 30 months, 150,000 miles, or 6000 hours. Primary and Secondary Fuel Filters Belt Routing 22,500 mi.
® UNIQUE REPAIR PROCEDURES Consult service literature for latest information before attempting any repairs Removing Flywheel Adapter RREEAARR CCOOVVEERR • The flywheel adapter can be removed using the edge of a heel bar by using the adjacent rear cover bolt for support. The heel bar may also be inserted into the adapter opening and supported on a crankshaft flange bolt to push the adapter off. FLYWHEEL ADAPTER HEEL BAR Removing Seal • Drill two small holes to fit the screw end of a slide hammer.
UNIQUE REPAIR PROCEDURES Seal Installer Base • Place a 360° bead of Loctite® Hydraulic Sealant on the outer circumference of the crankshaft flange. Bolt the base of the rear main seal/wear sleeve installer to the crankshaft. Make sure the crankshaft dowel pin is in the recess provided in the face of the tool. Lubricate the outer diameter of the seal with a 50/50 mixture of soap and water (do not use any other lubricant). Side the seal over the base.
UNIQUE REPAIR PROCEDURES Turbocharger Removal • Remove the oil supply line at the turbocharger center sections and the oil filter adapter. Remove the air inlet duct clamp, duct mounting bolt and the breather tubing from the breather. Loosen and remove the four exhaust flange bolts. EXHAUST FLANGE Removing Mounting Bolts • Remove three turbocharger mounting bolts that mount the low-pressure turbocharger turbine housing to the high-pressure pump cover.
UNIQUE REPAIR PROCEDURES Replacing O-Rings • Before reinstalling the turbocharger, replace the oil drain O-ring and the oil supply line O-rings. TURBOCHARGER DRAIN O-RING Turbocharger Installation • Lower the Turbocharger onto the highpressure pump cover. Install the three pump cover mounting bolts and handtighten. Apply anti-seize compound to the four exhaust pipe flange bolts and install hand tight with a new gasket. Loosen the crossover tube clamp and the turbinemating clamp.
UNIQUE REPAIR PROCEDURES Replacing Turbocharger Crossover Seal • Place the holding fixture of the crossover tube seal installing tool into a vise. Clamp the crossover pipe into the fixture. Screw the threads of the removal tool into the seal. CROSSOVER TUBE HOLDING FIXTURE Removing Seal • Install a side hammer into the seal remover tool and pull the seal out. SEAL PULLER Installing Seal • Drive a new seal into the crossover tube using the seal driver and a hammer.
UNIQUE REPAIR PROCEDURES Removing EGR Valve • The EGR puller must be used when removing the EGR valve or the valve and intake manifold may be damaged. EGR VALVE PULLER • To remove the EGR valve, first remove the EGR valve mounting bolts that hold the valve to the intake manifold. • Rotate the valve counterclockwise until the pins at the ends of the EGR puller arms will slip under the EGR valve housing tabs and into the holes. Hook the other end of the puller arms to the puller beam.
UNIQUE REPAIR PROCEDURES O-Ring Replacement OIL INLET CONNECTOR O-RING • Carefully remove and replace the external O-rings. The injector nozzle gasket can be installed using a 12-point 9mm deep-well socket. The socket is used to apply even pressure around the gasket during installation. • The connector O-rings should be replaced each time the injector is removed from the cylinder head.
UNIQUE REPAIR PROCEDURES Position Crankshaft for Rocker Removal • Special Tool ZTSE4697 can be used to service the rocker arms, valve bridges or push rods. Rotate the crankshaft until the vibration damper dowel pin is in the twelve o'clock position. Wiggle the rocker arms for number 1 cylinder. If the rockers do not move freely, rotate the crankshaft one complete revolution. The rockers should now be loose on number 1 cylinder. Cylinders number 1, 2 and 4 can now be serviced.
UNIQUE REPAIR PROCEDURES Cylinder Head Removal: Rocker Carrier • The rocker arm carrier is held in place with six small bolts and eight cylinder head bolts. • Four additional small bolts at the top hold the cylinder head to the crankcase. • Note: When any of the eight large cylinder head bolts are removed the head gasket and the cylinder head bolts must be replaced.
UNIQUE REPAIR PROCEDURES Installing Head and Carrier • Verify that the cylinder head dowel sleeves are installed in the crankcase. Install the new head gasket and two guide pins (locally made). Install the head and the four 8mm bolts across the top of the head. Install the push rods with copper ends to the rocker and the valve bridges in their proper location. INTAKE ROCKER EXHAUST ROCKER ROCKER LEVER CARRIER • Rotate the crankshaft until the damper dowel-pin hole is at six o'clock.
UNIQUE REPAIR PROCEDURES Cylinder Head Torque Sequence • Install new 14mm head bolts (lightly lubricated). Torque bolts 1 through 8 in sequence to 65 lb-ft (88 Nm). • Torque bolts 1, 3, 5, and 7 to 85 lb-ft (116 Nm). • Torque bolts 2, 4, 6, and 8 to 85 lb-ft (116 Nm). • Tighten all bolts 1 through 8 in sequence 90 degrees. • Tighten all bolts 1 through 8 a second time 90 degrees. • Tighten all bolts numbered 1 through 8 a third time 90 degrees. • Tighten all bolts 9 through 12 in sequence to 18 lb-ft.
UNIQUE REPAIR PROCEDURES Connecting Rod • The VT 275 engine uses fractured connecting rods. Do not alter the fractured mating surface of the rod or cap. Any alteration of the surface will result in severe engine damage. If the fracture surface is damaged by dropping the rod or by tightening the wrong cap to a rod, the connecting rod must be discarded.
UNIQUE REPAIR PROCEDURES Rear Cover Removal COOLANT DRAIN PLUG LOWER CRANKCASE REAR COVER • Remove the rear cover bolts. Use a rubber hammer to loosen the cover from the crankcase but do not remove. Separate the rear cover from the crankcase gasket and the high-pressure pump cover gasket. • Caution: Failure to separate the rear cover from the crankcase gasket and pump cover gasket could result in damage to both gaskets.
UNIQUE REPAIR PROCEDURES Balance Shaft Removal • The primary balance shaft rides within two bushings in the hollow camshaft. With the rear cover and the counterweight removed, the shaft can be extracted through the rear of the camshaft. The inner camshaft bushings are non-serviceable. CAMSHAFT GEAR PRIMARY BALANCER DRIVEN GEAR Balance Shaft Timing • The balance shaft is timed during reassembly by aligning the dot on the balance shaft gear with the dot on the crankshaft flange gear.
SPECIAL TOOLS ZTSE4687 ZTSE4690 • Crankshaft Timing Tool ZTSE4517 ZTSE4670 • Front Wear Sleeve Remover ZTSE4666 • Glow Plug Connector Remover/Installer ZTSE4698 • IPR Valve Socket Part No.
SPECIAL TOOLS ZTSE4676 ZTSE4669 • Turbocharger Crossover Seal Remover/Installer ZTSE4545 • EGR Valve Puller ZTSE4685 • EGR Cooler Test Plates ZTSE4559 • EGR Valve Puller Arm (offset) ZTSE4694 • Intake Port Magnetic Covers ZTSE4531 • Case-to-head Tube Removal Tool ZTSE4532 • Glow Plug Sleeve Remover ZTSE4528 • Glow Plug Sleeve Installer ZTSE4529 • Injector Sleeve Remover • Injector Sleeve Installer International® VT 275 V6 Engine 87
SPECIAL TOOLS ZTSE4681 ZTSE4525 • Fuel Pressure Gauge • Oil Cooler Test Plate / Pressure Adapter ZTSE4693 ZTSE4695 • Relay Breakout Harness ZTSE4664 ZTSE4696 • EGR Valve Breakout Harness ZTSE7559 • Fuel Pressure Test Adapter ZTSE4510 • Vacuum Pump and Gauge ZTSE4665 • Crankcase Pressure Test Adapter ZTSE4650 • 12-Pin Brakeout Harness 88 • MAF / IAT Sensor Breakout Harness International® VT 275 V6 Engine • Injector Connector Remover
SPECIAL TOOLS ZTSE4661 ZTSE4680 • Cylinder Head Lifting Bracket • Front Seal Installer / Wear Sleeve Installer ZTSE4557 ZTSE4526 • Oil Cooler Reservoir / High-Pressure Pump Magnetic Covers • Fuel / Oil Pressure Test Coupler ZTSE4542 ZTSE4682 • Intake Manifold Pressure Test Cap • Fuel Pressure Test Fitting (used for oil pressure measurement) ZTSE4409 ZTSE4594 • Gauge Bar Tool International® VT 275 V6 Engine • ICP System Test Adapter 89
HARD START NO START DIAGNOSTICS Technician Hard Start and No Start Diagnostics ® Date VT 275 Hours Unit No. VIN 4. KOEO Standard Test WARNING To avoid serious personal injury, possible death or damage to the engine or vehicle, read all safety instructions in the "Safety information" section of Engine Diagnostics Manual EGES-305 before doing procedures on this form. Do all tests in sequence unless otherwise stated. Doing a test out of sequence could cause incorrect results.
HARD START NO START DIAGNOSTICS Ambient temperature Engine SN Coolant temperature Engine HP Complaint Engine Family Rating Code 11. Main Power Relay Voltage to ECM 14. Glow Plug System Connect breakout harness between ECM main power relay and distribution box Crank engine and use a DMM to measure voltage to ECM. (Min 130 rpm for 20 seconds) Check voltage between connector Pin 5 and ground Instrum ent S pe c E C M c al i b r a t i o n IDM calibration Injector No. Turbocharger No.
PERFORMANCE DIAGNOSTICS Technician Performance Diagnostics ® Unit No. 5. Fuel Supply System WARNING To avoid serious personal injury, possible death or damage to the engine or vehicle, read all safety instructions in the "Safety information" section of Engine Diagnostics Manual EGES-305 before doing procedures on this form. Notes See "Performance Diagnostics"- Section 6 in EGES-305. Use figures and additional information to do each test or procedure on this form. Record results on this form.
PERFORMANCE DIAGNOSTICS Ambient temperature Engine SN Coolant temperature Engine HP Complaint Engine Family Rating Code ECM calibration IDM calibration Injector No. Turbocharger No. 15. Test Drive (Full load, rated speed) 11. Air Management Use EST to set engine idle speed, monitor engine load, toggle EGR valve and monitor MAF. Idle speed MAF L oa d EGR close M AF Me ss ag e S e t EGR ope n MAF DTC Set EGR close MAF DTC Set Correct problem causing messages or DTCs before restarting.
DIAGNOSTIC TESTS* Measure Fuel Pressure FUEL PRESSURE GAUGE • The engine will not perform correctly with low fuel pressure. Fuel pressure can be measured at the secondary filter housing by removing the fuel pressure test port plug and install the ICP System Test Adapter (ZTSE4594). Connect the Fuel Pressure Gauge (ZTSE4681) to the ICP System Test Adapter. Turn the key switch to the ON position and measure the fuel pressure.
DIAGNOSTIC TESTS Measure Fuel Pump Discharge Pressure • Determine the ability of the fuel pump to develop pressure by isolating the fuel pump from the engine-mounted regulator. • Remove the banjo bolt on the pressure line at the secondary fuel filter and insert the bolt through the back of the fitting so that the bolt faces away from the engine. Install the Fuel Pressure Test Adapter (ZTSE4696) and tighten the bolt. Attach a 0-160 psi Fuel Pressure Gauge (ZTSE4681) to the test adapter.
DIAGNOSTIC TESTS Measure Crankcase Pressure • Crankcase pressure can be used to evaluate the condition of the power cylinders. Remove the oil fill cap and thread the extended Oil Fill Tube (part number 180971C91) into the valve cover fill cap opening. Thread the Crankcase Pressure Test Adapter (ZTSE4510) into the fill adapter. • Block off the crankcase breather. By blocking the breather, all of the crankcase gasses are forced through the Crankcase Pressure Test Adapter.
DIAGNOSTIC TESTS ICP System Function Test • The Injection Control Pressure system must be able to build a minimum of 500 psi for the engine to start. During cranking, the ECM must command the IPR valve partially closed to create the pressure required for starting. Test this function by replacing the ECM signal with a direct connection between the IPR and battery power and ground. • Disconnect the IPR from the engine harness. Install the Actuator Breakout Harness (ZTSE4484) to the IPR only.
DIAGNOSTIC TESTS Under Valve Cover Leak Test • If the IPR function test reveals a massive air leak, remove the valve covers and apply shop air pressure to the ICP System Test Adapter (ZTSE4594). Attempt to isolate the location of the leak. The possible leak points are: -Rail to injector O-rings -Rail fittings -Case-to-head tube and port plug O-rings -Branch tube assembly -Pump housing • If the air leak is in the valve cover area, use a short length of rubber hose as a stethoscope to locate the air leak.
DIAGNOSTIC TESTS High Pressure Pump Test • The pump can be deadheaded by installing the ICP Leak Test Plug (ZTSE4690) in place of the rear left bank port plug, and the ICP Sensor Adapter ( also ZTSE4690) in place of the rear right bank port plug. Install the ICP sensor in the top of the ICP Sensor Adapter and connect the ICP sensor to the harness using the three-wire Pressure Sensor Breakout Harness (ZTSE4347) as an extension, if needed. Leave the valve covers off.
DIAGNOSTIC TROUBLE CODES Consult service literature for latest information before attempting any repairs CODE NUMBER CIRCUIT NAME CONDITION DESCRIPTION 111 112 113 114* 115* 121* 122* 123* 124* 125* 131* 132* 133* 134* 135* 143 145 146 147 148* 149* 152* 154* 155* 161* 162* 163* 221 222 225 231 237 238 241 251 268 311* 312* 313** 315* ECM ECM PWR ECM PWR ECT ECT MAP MAP MAP ICP ICP APS / IVS APS / IVS APS / IVS APS / IVS APS / IVS CMP CMP CKP CKP MAF MAF BAP IAT IAT MAT MAT EGR SCCS BRAKE EOP ATA FPC IA
DIAGNOSTIC TROUBLE CODES CODE NUMBER CIRCUIT NAME CONDITION DESCRIPTION 316 321** 322** 324** 325 331* 332* 333* 334 335 346 365* 368* 373 374 375 421-426 431-436 451-456 523 525* 533 534 543* 551 552 553 554 613* 614* 621* 622* 623* 624 626 631 632 655 661 664 665 EWPS EWPS EWPS IST EWPS ICP ICP ICP sys ICP sys ICP sys AMS EGR EGR IAH FPC GPC INJ INJ INJ IDM IDM IDM IDM ECM / IDM ECM / IDM ECM / IDM ECM / IDM ECM / IDM ECM ECM ECM ECM ECM ECM ECM PWR ECM ECM ECM ECM ECM ECM Engine Coolant Temperature
ENGINE & CHASSIS SCHEMATIC CKP EOT CMP EOP s w it ch MAT ECT IC P MAP MAF /I AT se nsor E D C B A 2 1 2 1 2 1 2 1 2 3 1 1 DB-LG LB-R GY-R BR-W LG-BK DB-LG BR-O R-W LG-R LG-R R O BK GY DB W-R P-O Y-R P-O W-LG P BR BK-PK 2 3 1 2 1 1 2 3 4 6 7 8 9 12 13 14 15 16 ACT PWR ACT PWR GND CAN 2 (+) CAN 2 (-) Valve Motor + (U Phase) Valve Motor + (V Phase) Valve Motor + (W Phase) Position Sensor Shield Drain Sensor Supply Position Sensor (U Phase) Position Sensor (V Phase) Position Sensor (W Phase)
ENGINE & CHASSIS SCHEMATIC ELECTRONIC CONTROL SYSTEM DIAGNOSTICS International ® R WARNING VT 275 ECM Engine (gray) Notes X-1 X-2 IAT MAF Signal Ground VREFA MAP ICP EOP MAT ECT EO T CMP (+) CMP (-) CMP/CKP SHD CKP (+) CKP (-) BCS IPR PWR IPR GPC GPD IAHC IAHD OWL X1-7 X2-2 X1-6 X1-14 X2-3 X1-20 X1-13 X2-14 X1-8 X2-1 X1-9 X1-10 X1-11 X1-1 X1-2 X2-18 X2-24 X1-12 X1-17 X1-21 X1-18 X2-11 X1-23 CKPO CMPO CAN 2 (+) CAN 2 (-) CAN 2 SHD BOO BPS X1-19 X1-24 X2-6 X2-13 X2-12 X1-15 X1-16 BK GY R-Y Informa
POWER DISTRIBUTION CENTER Consult service literature for latest information before attempting any repairs 104 International® VT 275 V6 Engine
POWER DISTRIBUTION CENTER 31 BLANK STARTER 32 40A PWR WINDOW 20A PARK LAMPS 33 25A BODY BUILDER 4* 30A IDM / ECM 34* 20A A/C CLUTCH 5 30A HEAD LAMPS 35 20A CLUSTER 6 40A BLOWER MOTOR 36 20A FUEL XFER PUMP 7 25A WIPER 37 10A TURN 8 30A ELECTRIC BRAKE 38 BLANK 9 20A DOOR LOCK 39 10A CORNERING LAMPS 10 20A STOP LAMPS 40* 10A IDM LOGIC PWR 11* 20A FUEL PUMP 41* 10A ECM PWR 12 20A RUN / ACC FEED 42 10A RADIO 13 20A RUN / START FEED 43 BLANK 14
GLOSSARY Accelerator Position Sensor (APS) A potentiometer sensor that indicates the position of the throttle pedal. Actuator A device that performs work in response to an electrical input signal. Catalytic Converter An antipollution device in the exhaust system that contains a catalyst for chemically converting some pollutants in the exhaust gases (carbon monoxide, unburned hydrocarbons, and oxides of nitrogen) into harmless compounds.
GLOSSARY Engine Oil Pressure Switch (EOPS) A switch that senses oil pressure. Mass Air Flow (MAF) Sensor A sensor that measures the air flow into the engine. Engine Oil Temperature (EOT) Sensor A thermistor sensor that senses engine oil temperature. Magnehelic Gauge A gauge that measures pressure in inches of water (in H2O). Exhaust Gas Recirculation A system used to recirculate a portion of the exhaust gases into the intake air charge in order to reduce oxides of nitrogen (NOx).
INDEX Cruise Control, 36 A Accelerator Position Sensor (APS), 36, 100, 106 Crankcase Pressure, 96 Actuator, 15, 26, 41, 43, 45, 97, 106 Crankpins, 5, 21 Air Conditioning (A/C), 39, 105 Crankshaft Position Output (CKPO), 23, 31, 38, 101 Air Filter Restriction Gauge, 42 Cylinder Head, 18, 49, 51, 80, 82, 98 Aeration, 94, 106 D Duty Cycle, 26, 106 Ambient Temperature, 106 American Trucking Association (ATA) Datalink, 38, 106 Analog Signal, 106 B Balancer Shaft, 21, 84 E Electronic Control Module (ECM), 22-
INDEX I Injection Control Pressure (ICP), 30, 54, 55, 96-99, 101, 107 S Secondary Fuel Filter, 48, 51 Sensors Barometric Absolute Pressure (BAP) Sensor, 36, 106 Camshaft Position (CMP) Sensor, 10, 31, 38, 100, 106 Crankshaft position (CKP) sensor, 14, 31, 100, 106 Engine Coolant Temperature (ECT) Sensor, 29 Engine Oil Temperature (EOT) Sensor, 16, 29, 100, 107 Hall-Effect Sensor, 37 Injection Control Pressure (ICP) Sensor, 30, 52, 55, 107 Intake Air Temperature (IAT) Sensor, 26, 29, 34, 40, 107 Manifold Ab
NOTES 110 International® VT 275 V6 Engine
NOTES International® VT 275 V6 Engine 111
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