gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Valve Clearance Specifications|Page 2021 > < Valve Clearance Specifications|Page 2019
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Valve Clearance: Adjustments

VALVE ADJUSTMENT

The 4.3L engine has screw-in rocker arm studs with positive stop shoulders. No valve adjustment is necessary. When the valve train requires service,
tighten the rocker arm nuts to 27 Nm (20 ft. lb.).

Valve Clearance Specifications|Page 2021 > < Valve Clearance Specifications|Page 2019