Hydraulic Adjusting Elements, Checking

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NOTE:

The hydraulic adjusting elements cannot be repaired.

Irregular valve noises are normal while starting the engine.

Special tools and workshop equipment required

Feeler Gauge
Crankshaft Socket T40058

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:

WARNING:

There is a risk of injury if the radiator fan turns on by itself.

The coolant fan can come on even when the ignition is turned off, for example, caused by the heat still in the engine compartment.

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

-- Rotate the crankshaft until the lobes on the hydraulic adjusting element to be checked face upward:

-- Remove the front noise insulation -1-, refer to FRONT NOISE INSULATION .

Fig 1: Identifying Noise Insulation

Courtesy of AUDI OF AMERICA, LLC

-- Insert the Crankshaft Socket T40058 guide pins as follows:

Fig 2: Guide Pin And Adapter T40058

Courtesy of AUDI OF AMERICA, LLC

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

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

Fig 3: Counter Hold Crankshaft Using Socket T40058

Courtesy of AUDI OF AMERICA, LLC

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

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

Courtesy of AUDI OF AMERICA, LLC

Final Procedures

-- Install the front noise insulation, refer to FRONT NOISE INSULATION .

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