OEM GMC Savana 2500 Lash Adjuster

GMC Savana 2500 Lash Adjuster Parts and Q&A

• Valve Lifters
  17122490
  Q: How to replace the Lash Adjusters on GMC Savana 2500?

  A:

  To replace the valve lifters, remove the Cylinder Head and the gasket first. Next, remove valve lifter guide bolts and then pull the valve lifters and guide out keeping in mind that there may be some lifters that are stuck because of gum or varnish deposits. In case of necessity, it is possible to use j 3049-a (Valve Lifter Remover) to help remove the valve lifters. After removal, categorize or label them in order to reinstall them correctly, then clean and check the valve lifters. During the installation process, when reinstalling, use the used valve lifters back in their original positions. Encourage valve lifters and engine block valve lifter bore with clean lubricated oil engine, and valve lifters subsequently be introduced into the guide bore lifter establishing flat area of the valve lifter's upper part to-route working in association with the lifter guide bore's flat area and press all the way into the guide bore. Bolt the valve lifter and guide onto the engine block while observing the fastener precautions, and then bolt on the valve lifter guide bolt with 12 nm (106 lb in). Lastly, replace the Cylinder Head and gasket.
• Valve Lifters
  17120735
  Q: How to service and repair the lifter/lash adjuster using the Valve Lifter Remover (J 3049) on GMC Savana 2500?

  A:

  In order to service and repair the lifter/Lash Adjuster, the necessary tool is the valve lifter remover (J 3049). First, remove the lower Intake Manifold, valve Rocker Arms and valve Pushrods, taking care to take them and put them on a rack to install them back in their original positions. Then unbolt and remove the valve lifter Pushrod guide leaving careful to put valve lifting to the rack upright to keep oil in it. Continue using the remove valve lifters, some of which may be gummed up with gum and varnish deposits that may require the use of the valve lifter remover (J 3049). Clean any varnish from the valve lifter long bores with a bucket containing a cleaning solvent and a shop towel, and examine the bores for unusual wear or scoring, changing the engine block if required. Also eye the Camshaft for wear or damage, putting it out if the camwear is questionable. Clean and verify the valve lifters and valve Pushrod guide prior to installing. Apply lubricant gm p/n 12345501 or other viscous injector oil tail to valve lifter rollers, and when replacing the valve lifters, put them back from the original. Install the valve lifter Pushrod guides with a final thread of guide bolts to 16 nm (12 ft. Lbs.), then install the valve rocker arms and pushrods and have the lower Intake Manifold reinstalled. It is normal during the perspective lifting to create a little ticking noise while it is the first time when the engine is started. The oil pressure could be increased slightly by raising rpm of the engine to remove the noise.