gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Valve Clearance Adjustment - On Vehicle|Page 2247 > < Valve Clearance Adjustment - On Vehicle|Page 2245
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Valve Clearance: Adjustments
Valve Clearance Adjustment - Off Vehicle

Valve Clearance Adjustment

1. Rotate the crankshaft to bring the number 1 cylinder at the top dead center of the compression stroke. The number 1 cylinder is the front cylinder

on the right bank. The mark on the crankshaft balancer should be aligned with the mark on the engine.

2. Loosen the valve adjusting screws.
3. Insert a feeler gauge between the tip of the rocker arm and the valve bridge.

Valve Clearance Adjustment - On Vehicle|Page 2247 > < Valve Clearance Adjustment - On Vehicle|Page 2245