OEM Chevrolet Trailblazer Rocker Arm

Chevrolet Trailblazer Rocker Arm Parts Questions & Experts Answers

• Rocker Arms
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  Q: How to service and repair the rocker arm assembly on Chevrolet Trailblazer?

  A:

  The first step for repairing or servicing Rocker Arm assembly requires removing both the Camshaft cover and the exhaust and intake sprocket bolts. Insert the Camshaft sprocket holding tool j 44222 onto the Cylinder Head where horizontal bolts should be tightened to keep timing chain components stable. After removing the sprockets from the camshafts with their attached timing chains you should place the Camshaft caps in a rack for correct replacement later. The next step should be removal of Camshaft cap bolts and Camshaft caps along with the camshafts. Prepare value rocker arms together with valve lash adjusters for their proper reinstallation order. Before proceeding remove all valve rocker arms along with valve lash adjusters. Install the valve lash adjusters by first applying lubricating oil and then placing them in their original positions. Apply engine oil to the valve Rocker Arm roller before you put the valve rocker arms into their regular positions. The Camshaft journals require application of engine oil before reinstalling the camshafts into their original positions. Tighten the Camshaft cap bolts until they reach 12 nm (106 inch lbs.). Use caution to reinstall Camshaft sprockets onto the camshafts while removing the Camshaft sprocket holding tool (J 44222). Start by installing the intake Camshaft sprocket washer together with bolt and exhaust Camshaft actuator bolt. Tighten the intake Camshaft sprocket bolt to 20 nm (15 ft. Lbs.) for the initial application before finishing it with a 100 degree torque using the torque angle meter (J 36660-A). The torque wrench must first tighten the exhaust Camshaft actuator bolt to 25 nm (18 ft. Lbs.) on the initial rotation while subsequent tightening adds 135° of angle by torque angle meter (J 36660-A). Finally, install the Camshaft cover.