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 road test if necessary.

NOTE:

If Irregular Valve Noises Disappear But Return During Short Drives, Oil Check Valve Must Be Replaced. Oil Check Valve Location. Refer to OVERVIEW - OIL SPRAY JETS/VALVES .

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

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

Vehicles With A Manual Transmission

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

Vehicles With Automatic Transmission

Fig 1: Identifying Notch -Arrow A- On T40257 Must Face Color Dash -Arrow B- On Vibration Damper

Courtesy of AUDI OF AMERICA, LLC

-- Position the :T40257 onto the :T40263 .

-- Attach the :T40257 to the bolts on the vibration damper.

The notch -arrow A- on the :T40257 must face the color dash -arrow B- on the vibration damper.

NOTE:

Ignore The Semi-Round Countersink On The :T40257 .

Continuation For All Vehicles

Fig 2: Checking Play Between Cam Lobes & Roller Rocker Lever

Courtesy of AUDI OF AMERICA, LLC

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

Final Procedures

-- Install the cylinder head cover. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING . Refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .