Operation CHARM
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GMC Truck
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1991
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S15/T15 4WD P/U V6-173 2.8L
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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
VALVE SEATS
Face Angle (Intake & Exhaust)
45°
Seat Angle (Intake & Exhaust)
46°
Seat Runout (Intake & Exhaust)
0.05 mm (0.002 in)
Seat Width
Intake
1.25 - 1.50 mm (0.049 - 0.059 in)
Exhaust
1.60 - 1.90 mm (0.063 - 0.075 in)