Overhaul and Machining Specifications

Engine Liter/CID 4.3L/V6-262

All specifications given in inches.

Stem Diameter Std.
Intake 0.3410-0.3417
Exhaust 0.3410-0.3417
Maximum Tip Refinish [03]
Face Angle 45 deg.
Margin [01]
Intake 0.0315
Exhaust 0.0315
Valve Lash [07]

[01] Minimum.
[03] Grind only enough to provide true surface. After grinding valve stems, ensure sufficient clearance remains between rocker arm & valve spring cap or rotator.
[07] Torque rocker arm nut to 20 ft. lbs.