Service manual

Engine Mechanical Specifications (5.7 L) (cont’d)
Application
Specification
Metric English
Piston Bore Clearance – Production 0.018–0.053 mm 0.0007–0.002 in
Piston Bore Clearance – Service 0.018–0.061 mm 0.0007–0.0024 in
Piston Pin
Clearance in Piston – Production 0.013–0.023 mm 0.0005–0.0009 in
Clearance in Piston – Service 0.013–0.025 mm 0.0005–0.0010 in
Diameter 23.545–23.548 mm 0.9270–0.9271 in
Interference Fit in Connecting Rod 0.012–0.050 mm 0.0004–0.0019 in
Piston Rings – End Gap Measured in Cylinder Bore
Piston Compression Ring Gap – Production – Top Groove 0.25–0.40 mm 0.098–0.015 in
Piston Compression Ring Gap – Production – 2nd Groove 0.038–0.058 mm 0.0015–0.003 in
Piston Compression Ring Gap – Service – Top Groove 0.25–0.50 mm 0.009–0.019 in
Piston Compression Ring Gap – Service – 2nd Groove 0.46–0.80 mm 0.018–0.031 in
Piston Compression Ring Groove Clearance – Production – Top
Groove
0.030–0.070 mm 0.0012–0.0027 in
Piston Compression Ring Groove Clearance – Production –
2nd Groove
0.038–0.080 mm 0.0015–0.003 in
Piston Compression Ring Groove Clearance – Service Limit – Top
Groove
0.030–0.090 mm 0.0012–0.0035 in
Piston Compression Ring Groove Clearance – Service Limit –
2nd Groove
0.040–0.100 mm 0.0015–0.0040 in
Piston Oil Ring Gap – Production 0.25–0.76 mm 0.009–0.029 in
Piston Oil Ring Gap – Service 0.25–0.90 mm 0.009–0.035 in
Piston Oil Ring Groove Clearance – Production 0.046–0.196 mm 0.0018–0.0077 in
Piston Oil Ring Groove Clearance – Service 0.046–0.200 mm 0.0018–0.0079 in
Valve System
Valve Face Angle 45 degrees
Valve Head Edge Margin 0.79 mm – Minimum 0.031 in – Minimum
Valve Lash
Rotate the Valve Rocker Arm Nut Clockwise
360 degrees from Zero Lash
Valve Lifter Hydraulic Roller
Valve Rocker Arm Ratio 1.5:1
Valve Seat Angle 46 degrees
Valve Seat Runout 0.05 mm – Maximum 0.002 in – Maximum
Valve Seat Width – Exhaust – Heavy Duty 1.50–2.56 mm 0.059–0.101 in
Valve Seat Width – Exhaust – Light Duty 1.65–2.49 mm 0.065–0.098 in
Valve Seat Width – Intake 1.02–1.65 mm 0.040–0.065 in
Valve Spring Free Length 51.3 mm 2.02 in
Valve Spring Installed Height – Exhaust 42.92–43.43 mm 1.67–1.70 in
Valve Spring Installed Height – Intake 42.92–43.43 mm 1.67–1.70 in
Valve Spring Pressure – Closed 338–374 N at 43.2 mm 76–84 lb at 1.70 in
Valve Spring Pressure – Open 832–903 N at 32.3 mm 187–203 lb at 1.27 in
Valve Stem Clearance – Exhaust – Production 0.025–0.069 mm 0.0010–0.0027 in
Valve Stem Clearance – Intake – Production 0.025–0.069 mm 0.0010–0.0027 in
Valve Stem Clearance – Exhaust – Service 0.025–0.094 mm 0.0010–0.0037 in
Valve Stem Clearance – Intake – Service 0.025–0.094 mm 0.0010–0.0037 in
Valve Stem Diameter 8.661–8.679 mm 0.3410–0.3416 in
Valve Stem Oil Seal Installed Height – Measured from the Top of the
Large Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal
1–2 mm 0.03937–0.07874 in
SIE-ID = 378556
Engine Engine Mechanical - 5.0L and 5.7L 6-7
2002 - Unit Repair (May 25, 2001)