OEM GMC Sierra 3500 Lash Adjuster

GMC Sierra 3500 Lash Adjuster Parts Questions & Experts Answers

• Valve Lifters
  17122490
  Q: How to replace the Lash Adjusters on GMC Sierra 3500?

  A:

  Begin the valve lifter replacement after the Intake Manifold removal and the subsequent removal of valve Rocker Arms and pushrods. Begin by removing the valve lifter guide retainer bolts before you remove both the retainer and valve lifter guides. Before removing valve lifters you must mark and arrange them according to their original placement. When valve lifters become trapped in their bore by gum or varnish deposits you should employ the valve lifter remover (J 3049-A). During valve lifter inspection following cleaning operations you need to replace all lifters if installing a new Camshaft. Use gm U.S. P/N 12345501 lubricant or canadian P/N 992704 or an equivalent product to coat valve lifter rollers. For valve lifter reuse install them back into their original location while checking that the valve lifter guide retainer makes full contact with all guides before installing new guide retainers if any show bending. Replace the retainer because it shows bending. The first step is to lay down the valve lifters before setting the valve lifter guides directly over the flat portions of each valve lifter. This alignment step must have the valve lifter rollers pointing directly at the Camshaft lobes. Install the valve lifter guide retainer first before installing the guide retainer bolts with a torque of 25 nm (18 ft. Lbs.). Finally, put back the valve rocker arms and pushrods.