Operation CHARM
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GMC Truck
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1998
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C 3500 Truck 2WD V8-454 7.4L VIN J SFI
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Repair and Diagnosis
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Specifications
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Mechanical Specifications
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Engine
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Cylinder Head Assembly
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Valve Seat
Valve Seat
Seat Angle (Intake & Exhaust)
46 degrees
Seat Runout (Intake & Exhaust)
0.051 mm (Maximum)(0.002 inch Maximum)
Seat Width Intake
0.762-1.524 mm (0.030-0.060 inch)
Seat Width Exhaust
1.524-2.413 mm (0.060-0.095 inch)