GMC Workshop Service and Repair Manuals

Valve Seat: Specifications

Valve Seat Angle ..............................................................................................................................................................................................  46 degrees
Valve Seat Runout ....................................................................................................................................  0.05 mm (Maximum)(0.002 inch (Maximum))
Valve Seat Width (Exhaust) ......................................................................................................................................  1.65 - 2.49 mm (0.065 - 0.098 inch)
Valve Seat Width (Intake) .........................................................................................................................................  1.14 - 1.78 mm (0.045 - 0.070 inch)