GM 17120735
Valve Lifters

Associated with replacing the lash adjusters is the removal first the Intake Manifold. It should be ensured that the lash adjusters and the valve guides are installed at the same locations from where they were pulled out. Next, take away the valve push rods and the Lash Adjuster guide retainer, and also the Lash Adjuster guides. To ensure the oil stays in the lash adjusters, unload them in a rack in an upright manner. Remove any stuck lash adjusters using Lash Adjuster remover (J 3049-A) by removing them through the Cylinder Head. Change the engine oil and Oil Filter when installing new lash adjusters or a new engine Camshaft and add engine oil supplement gm p/n 1052367 or an equivalent to the engine oil. Replace the lash adjusters depending on the installation of a new engine Camshaft, and then the lash adjusters are installed one after the other, followed by the installation of Lash Adjuster guide retainer, valve pushrods and finally the Intake Manifold is installed.

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.

The necessary tools include the Valve Lifter Remover (J 3049-A).

Use the Valve Lifter Remover (J 3049-A) for extraction.

Unit Repair encompasses essential service procedures, machining, cleaning, inspection, and fitting necessary for engine overhaul.

Take out the valve lifter(s), guide bolts, and guide(s).

Install the valve lifters one at a time, followed by the valve push rods, and finally reinstall the intake manifold.

Replace all valve lifters and then install the valve lifters one at a time, followed by the valve push rods and finally, the intake manifold.