Hydraulic Adjusting Elements, Checking

WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. 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

SocketT40058
Feeler gauge

Procedure

-- Start engine and allow it to run until coolant fan has switched on once.

-- Increase RPM to approximately 2500 for 2 minutes and perform road test if necessary.

NOTE:

If irregular valve noises disappear but reappear during short drives, oil check valve must be replaced. Oil check valve location. Refer to OIL CHECK VALVE AND SPRAY NOZZLE VALVE OVERVIEW .

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

-- Remove the cylinder head cover. Refer to LEFT CYLINDER HEAD COVER , RIGHT CYLINDER HEAD COVER .

-- Insert the T40058 guide pins as follows:

Fig 1: Inserting T40058 Guide Pin

Courtesy of AUDI OF AMERICA, LLC

Small diameter -arrow 1- points to engine.
Large diameter -arrow 2- points to socket.

-- Rotate the crankshaft until the cam lobes on the adjusting element to be checked face upward.

Fig 2: Locating Torque Converter Bolts And Adapter T40058 To Counterhold Crankshaft

Courtesy of AUDI OF AMERICA, LLC

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

Fig 3: Checking Play Between Cam Lobes & Roller Rocker Lever

Courtesy of AUDI OF AMERICA, LLC

If a 0.20 mm feeler gauge can be inserted between cam lobes and roller rocker lever:

-- Replace the hydraulic adjusting element. Refer to CAMSHAFTS .

Final procedures

-- Install cylinder head cover. Refer to LEFT CYLINDER HEAD COVER , RIGHT CYLINDER HEAD COVER .