Lifter / Lash Adjuster: Testing and Inspection

Hydraulic Lash Adjuster, Checking

Special tools, testers and auxiliary items required

• Feeler Gauge

• The hydraulic lash adjusters cannot be serviced.

• Irregular valve noises are normal while starting the engine.

Procedure

- Start the engine and let it run until the coolant temperature is at least 80 °C (176 °F).

- Increase the engine speed for about 2 minutes to approximately 2500 RPM, perform a road test if necessary.

• If the irregular valve noises disappear but always appear when driving short differences, replace the oil check valve - arrow - on the rear face side in the affected cylinder head.






If the hydraulic lash adjusters are still noisy, determine which adjuster is defective as follows:

- Remove the left or right cylinder head cover. Refer to => [ Cylinder Head Cover ] Cylinder Head Cover.

- Rotate the crankshaft until the camshaft for the hydraulic adjuster to be checked is at the top. To do this:

• Remove the noise insulation and rotate the crankshaft clockwise using the vibration damper bolt.

- Determine the play between the camshafts and the roller rocker arms.






- Press the roller rocker arm down with a screwdriver - arrow -.

If a 0.20 mm feeler gauge can be inserted between the camshaft and roller rocker arm:

- Replace the hydraulic lash adjuster.