Pontiac Workshop Service and Repair Manuals

Valve: Specifications

Stem Diameter Intake

0.3425-0.3432 in 

Stem Diameter Exhaust

0.3420-0.3427 in 

Valve Installed Height

[23] in 

Note: Measured with gauge J-25289 or equivalent. Minimum

clearance between gauge and tip of valve stem, .015 inch;

minimum clearance between gauge and rotator, .030 inch.

After refinish, valve tip must project at least.005 inch

above rotator.

Face Angle

44 deg 

Note: Exhaust -- 30 degrees.

Margin

0.025 in