Genuine 2006 Pontiac G6 Lash Adjuster

2006 Pontiac G6 Parts Questions & Experts Answers

• Q: How can a noisy lash adjuster be isolated and what steps should be taken for removal and reinstallation in 3.5L,3.9L V6 engine on 2006 Pontiac G6?

  A: A noisy lash adjuster can be isolated when the engine is idling by using a mechanic's stethoscope or a length of hose near each valve while listening at the other end, or by removing the valve cover and touching each valve spring retainer with the engine idling to feel for shock if a adjuster is defective. Common causes of noisy adjusters include dirt trapped inside and insufficient oil flow, viscosity, or pressure, so it's important to check the oil for fuel contamination, correct level, cleanliness, and viscosity before concluding that the adjusters are at fault. To begin removal, take off the valve cover(s) and intake manifold, then remove the rocker arms and pushrods. Next, take out the bolts holding the roller adjuster guide to the block and remove the two guides, marking them for their original sides. Adjusters can be extracted using a special tool, a small magnet, or fingers, and a machinist's scribe can help pull them out by positioning the point under the retainer ring. Caution is advised against using pliers unless intending to replace the adjusters, as they may damage the precision machined components. Store the adjusters in a clearly labeled box to ensure they are reinstalled in their original locations, and clean them thoroughly with solvent, drying them without mixing them up. Inspect each adjuster for scuffing, score marks, or uneven wear, and check the rollers for wear or damage, ensuring they turn freely. When reinstalling used adjusters, place them back in their original bores, soak new adjusters in oil to remove trapped air, and coat all adjusters with moly-base grease or engine assembly lube before installation. Finally, install the push rods and rocker arms, and complete the installation in reverse order of removal, then run the engine to check for oil leaks.