Hydraulic Adjusting Elements, Checking: 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. For the left side. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING  and for the right side refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Rotate the crankshaft so the cam lobes on that adjuster that must be checked are at the top. To do this:

Vehicles With A Manual Transmission: 

-- Move the vehicle forward with 4th gear engaged and the ignition switched off.

Vehicles With Multitronic Transmission 0Aw/Automatic Transmission 0B6: 

Fig 1: Automatic Transmission Fluid Oil Pan

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-- Remove the front noise insulation -1-. Refer to NOISE INSULATION .

-- Insert the Crankshaft Socket:T40058  guide pins As Follows: 

Fig 2: Guide Pin And Adapter T40058

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• The large diameter -arrow 1- faces the engine.
• The small diameter -arrow 2- faces the adapter.

-- Rotate the crankshaft with the Crankshaft Socket:T40058  in the direction of engine rotation -arrow-.

Fig 3: Identifying TDC With Special Tool Adapter T140058

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Continuation For All Vehicles: 

Fig 4: Checking Play Between Cam Lobes & Roller Rocker Lever

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-- 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 hydraulic adjusting element. Refer to CAMSHAFT, REMOVING AND INSTALLING .

Final procedures 

-- Install the cylinder head cover. For the left side. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING  and for the right side refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Install the front noise insulation. Refer to NOISE INSULATION .