OEM GMC Terrain Lash Adjuster

GMC Terrain Lash Adjuster Parts and Q&A

• Valve Lifters, Green Line
  12686787
  Q: How to replace the exhaust camshaft and lash adjusters on GMC Terrain?

  A:

  The replacement process of an exhaust camshaft and valve lifters begins by taking off the exhaust camshaft position actuator first. Start by turning each bolt on each cap one time until no spring tension exists on the camshaft before you mark each bearing cap for future installation. Bearing caps should be extracted after unbolting their hardware and subsequently the exhaust camshaft needs to be extracted. The correct order of roller followers and hydraulic adjusters should be kept throughout reinstallation. The work sequence requires you to uninstall both the camshaft roller followers and hydraulic element lash adjusters. The installation process requires inserting each hydraulic element lash adjuster into its bore before lubricating it together with the valve tips. The original placement of roller followers on the camshaft must be maintained because replacing the camshaft requires replacement of its followed followers as well. Locate the roller followers of the valve stem tip and lash adjuster and then put on the exhaust camshaft before applying lubrication. For bearing cap bolt installation use hand power only to reach a torque rating of 10 nm (89 lb in) when tightening produced equally across each bolt starting with three initial turns before final attachment. The exhaust camshaft position actuator needs final installation as the last step.