Lifter / Lash Adjuster: Testing and Inspection

Hydraulic Adjusting Elements, Checking

• The hydraulic adjusting elements cannot be repaired.

• Irregular valve noises are normal while starting the engine.

Special tools, testers and auxiliary items required

• Socket (T40058)

• 0.20 mm feeler gauge

Procedure

- Start the engine and let it run until the coolant fan switches on once.

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

- If the hydraulic adjusting elements are still loud, determine which one is faulty as follows:

- Remove the cylinder head cover, refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.

Vehicles Built through 05.10:

- Loosen the hose clamp - arrow -, remove the air duct hose and move it to the side.






All Vehicles:

- Insert the (T40058) guide pins as follows:






• The large diameter - arrow 1 - faces the engine.

• Small diameter - arrow 2 - points to adapter.

- Turn the crankshaft with the (T40058) in direction of engine rotation - arrow - until the cam on the balance element which is to be checked faces upward.






- To determine the play between cam lobes and roller rocker lever, press lever down - arrow -.






- If a 0.20 mm feeler gauge can slide between the cam lobes and roller rocker lever, replace the adjusting element. Refer to => [ Left Cylinder Head Camshaft ] Left Cylinder Head Camshaft.

Final Procedures

• The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing.

• Secure all hose connections with hose clamps appropriate for the model, refer to the Parts Catalog.

- Install the air duct hose and screw-type clamps. Refer to => [ Install the Air Duct Hoses and Screw-Type Clamps. ] Air Duct Pipes and Air Duct Hoses Overview, Vehicles Built Through 05.10.

- Install the cylinder head cover. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.