Lifter / Lash Adjuster: Testing and Inspection

Hydraulic Lifters, Checking

Special tools

^ Feeler gauge
^ Wooden or plastic wedge

Note:

- Replace faulty lifter complete (cannot be adjusted or repaired).

- Irregular valve sounds during engine starting are normal.

Test sequence

- Start engine and run until radiator fan has switched on once.
- Increase engine speed to about 2500 rpm for approx. 2 min.
If lifter(s) are still noisy, locate faulty lifter(s) as follows:
- Remove intake manifold upper part:

Note:

- Seal the open portions of the lower intake manifold against dirt etc. with clean shop rags.

- Remove valve cover.
- Rotate crankshaft clockwise, until cam lobe of lifter to be checked is pointing upward.






- Push hydraulic lifter down lightly with a wooden or plastic wedge. If, when pushed down, a 0.2 mm thick feeler gauge can be pushed between the camshaft and lifter, replace that lifter.

Note:

- DO NOT start the engine for approx. 30 minutes after installing new lifters. Hydraulic compensation elements in the lifters must settle, otherwise the valves will strike the pistons.