OEM 2002 Chevrolet Trailblazer Valve Stem Oil Seal

2002 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: What tools are required to service and repair the valve guide seal, specifically for valve stem oil seal and valve spring replacement on 2002 Chevrolet Trailblazer?

  A: Service and maintenance of the Valve Stem Oil Seal requires three essential tools for Valve Stem Oil Seal and valve spring replacement jobs: valve stem seal remover and installer (J 38820) and Camshaft sprocket holding tool (J 44222) and valve spring compressor (J 44228). Technical tool requirements for this task consist of valve stem seal remover and installer (J 38820) along with Camshaft sprocket holding tool (J 44222) and valve spring compressor (J 44228). Start by removing the cam cover and spark plugs before moving on to exhaust and intake sprocket bolts. The Camshaft sprocket holding tool (J 44222) goes onto the Cylinder Head to keep timing chain components stable while you should thread the two horizontal bolts through the Camshaft sprockets to secure chain tension. Use a Camshaft sprocket holding tool (J 44222) to move the sprockets with chain out of position from the camshafts before you detach the Camshaft cap bolts for organized reinstallation placement. Follow this sequence of tasks: first remove Camshaft caps and camshafts, add suitable adapter pressure to the cylinder and finally insert the valve spring compressor (J 44228). Remove the valve spring compressor (J 44228) between the valve keys before lifting off the valve spring retainer and valve during the operation. Use the valve stem seal remover and installer (J 38820) to extract the seals before thoroughly cleaning and examining the Cylinder Head. Installation requires clean engine oil to lubricate valve stems followed by a valve stem seal remover and installer (J 38820) to seal the valves before installing the valve spring along with the valve spring retainer. After using the valve spring compressor (J 44228) to compress the valve springs a second time install the valve keys before removing the valve spring compressor (J 44228). After reducing air pressure to the cylinder system apply clean engine oil to both Camshaft journals alongside thrust face and lobes before reinstalling the shafts in their original orientation. Release the Camshaft sprocket holding tool (J 44222) after tightening cap bolts to 12 nm (106 inch lbs.) while carefully installing camshafts with sprockets back on. After installing the intake Camshaft sprocket washer along with the exhaust Camshaft actuator bolt begin tightening the intake Camshaft sprocket bolt to 20 nm (15 ft. Lbs.) for the initial round before performing the final adjustment with torque wrench (J 36660-A) to achieve an extra 100°. The first torque specification for the exhaust Camshaft actuator bolt is 25 nm (18 ft. Lbs.) followed by a second torque of 135° using torque wrench (J 36660-A). The installation process ends with the plug-in of spark plugs along with the Camshaft cover.