Lifter / Lash Adjuster: Testing and Inspection

Hydraulic lifters, checking

Special tools and equipment
^ Feeler gauge
^ Wood or plastic wedge

Note:
^ Replace each faulty hydraulic lifter complete only (cannot be adjusted or serviced).
^ Irregular valve noises when starting engine are normal.

Work sequence
- Start engine and run until coolant fan has switched on once.
- Increase engine speed to about 2500 rpm and hold for approx. 2 minutes.

If the hydraulic lifters are still noisy, locate faulty lifters as follows:
- Remove intake manifold upper part.

Note: Seal the intake ports in the intake manifold lower section with clean cloths.

- Remove cylinder head cover.
- Rotate crankshaft clockwise, until cam of lifter to be checked is pointing up.
- Determine clearance between cam lobe and hydraulic lifter.

If the clearance is greater than 0.2 mm:
- Replace hydraulic lifter.

If clearance is less than 0.1 mm or no clearance exists, proceed with check as follows:





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

Note: When new lifters have been installed the engine must not be started for about 30 minutes. The hydraulic compensation elements must settle or the valves will strike the pistons.