User Manual

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200 SPECIFICATIONS
SPECIFICATIONS
Improved Design
Compared to earlier designs, the E7 engines
include improvements required to accommodate
higher horsepower ratings and future emission
standards. These changes require increased
displacement, higher peak cylinder pressures
and a superior engine cooling system. This was
all accomplished without a substantial change in
engine weight.
Engine General Specifications
Characteristic Description
Weight (wet*) 2300 lbs. (1043.3 kg)
Weight (dry) 2210 lbs. (1002.5 kg)
Displacement 728 cu. in. (12L)
Bore and stroke 4-7/8 x 6-1/2 in. (123.83 x 165.10 mm)
Engine oil capacity 33.5 qts. (32L)
Coolant capacity 13 qts. (12.3L)
Compression ratio 16.5:1 (up to 375 hp); 15.3:1 (375 hp and above)
Fasteners and threads Metric and English
*Wet includes oil and coolant
Engine Features
Component Description
Cylinder block Alloyed gray cast iron
Main bearing caps Ductile iron, intermediate supported with buttress screws to prevent bulkhead
movement
Flywheel housing Standard — Aluminum, standard SAE No. 1, precision doweled
Optional — Ductile iron
Cylinder sleeves Wet/dry, replaceable, centrifugally cast, alloyed cast iron
Cylinder sleeve seal Teflon-coated AFLAS/EPDM, intolerant of oil (use glycol for installation
lubricant)
Cylinder heads Alloy gray cast iron; four valves per cylinder, two cylinder heads per engine
Cylinder head gaskets
— Body Nonasbestos material with a steel core (two per engine)
— Fire ring Steel, six per engine
Piston assembly Refer to Tune-Up Specifications manual.
Pistons (1989–1990) Aluminum alloy, Ni-resist insert top two grooves, steel insert third groove, oval
and roll burnished pin bores, continuous oil cooling
Pistons (1991 and later) Two-piece, top crown material steel, aluminum alloy skirt, three-ring piston
Piston rings (1989–1990)
— Compression Chrome, three per cylinder
— Oil control Chrome, one per cylinder
Piston rings (1991 and later)
— Compression Plasma, top ring; chrome, second ring
— Oil control Chrome, one per cylinder
Piston pins Full-floating, 2.25 inch (5.72 cm) diameter, full-pressure lubrication through
rifle-drilled holes in connecting rods
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