Valve Rocker Arm and Hydraulic Valve Lash Adjuster Cleaning and Inspection for Chevrolet Colorado Pickup - 4WD 2004

1. Clean the valve rocker arms and valve lash adjusters in cleaning solvent.
2. Dry the valve rocker arms and valve lash adjusters with compressed air.
3. Inspect the valve rocker arms for the following conditions:

•	Excessive wear at the valve contact or valve lash adjuster socket area

•	A loose or damaged pin

•	A worn or damaged roller. The roller should rotate freely with no binding or roughness.





Important: Keep the valve rocker arms and valve lash adjusters in the order from where they where removed.

4. Inspect the valve lash adjusters for the following conditions:

•	Excessive wear

•	Clogging of the oil passage

•

Damage

•	Collapsed or spongy