TrailBlazer 4WD L6-4.2L VIN S (2002)
Rocker Arm Assembly: Service and Repair
Valve Rocker Arm and Valve Lash Adjuster Replacement
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Tools Required
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J 36660-A Torque Angle Meter
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J 44222 Camshaft Sprocket Holding Tool
Removal Procedure
1. Remove the camshaft cover.
2. Remove the exhaust and the intake sprocket bolts.
3. Install the J44222 onto the cylinder head and adjust the horizontal bolts into the camshaft sprockets in order to maintain chain tension and keep
from disturbing the timing chain components.
4. Carefully move the sprockets with the timing chain off of the camshafts.
Important: Place the camshaft caps in a rack to ensure the caps are installed in the same location from which they were removed.
5. Remove the camshaft cap bolts.
6. Remove the camshaft caps.