Hydraulic Adjusting Elements, Checking

WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The hydraulic adjusting elements cannot be repaired.

Irregular valve noises are normal while starting the engine.

Special tools and workshop equipment required

Crankshaft Socket :T40058
Feeler Gauge

-- 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 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 CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Insert the :T40058 guide pins as follows:

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

-- Rotate the crankshaft in direction of engine rotation -arrow- using the :T40058 and offset open-end wrench.

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

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-- 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. Refer to CYLINDER HEAD COVER, REMOVING AND INSTALLING .