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Home >> GMC >> 1996 >> C3500 HD 7.4 J, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Engine Mechanical - 4.3L V6 - VIN W & ,X) >> Engine Specifications >> Cylinder Head Specifications

Cylinder Head Specifications

WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1997 Oldsmobile Bravada, 1997 GMC Sonoma, 1997 GMC Savana, 1997 GMC Safari, and 1997 GMC Pickup. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD

Application Specification
Valve Seats
Intake Valve
Seat Angle 46°
Seat Width .035-.060" (.88-1.52 mm)
Maximum Seat Runout .002" (.05 mm)
Exhaust Valve
Seat Angle 46°
Seat Width .062-.093" (1.58-2.36 mm)
Maximum Seat Runout .002" (.05 mm)
Valve Guide Oil Clearance .001-.003" (.03-.07 mm)
Warpage .004" (.10 mm)