Hydraulic Adjusting Elements, Checking

Special tools and workshop equipment required 

• Crankshaft SocketT40058
• Feeler Gauge

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.

-- 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  for RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Remove the front noise insulation -1-. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

Fig 1: Identifying Front/Rear Noise Insulation

Courtesy of AUDI OF AMERICA, LLC

-- Insert the Crankshaft SocketT40058 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 180° further in direction of engine rotation -arrow- using the Crankshaft SocketT40058 and ring 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-.

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

Courtesy of AUDI OF AMERICA, LLC

-- If a 0.20 mm feeler gauge can slide between the cam lobes and roller rocker lever, replace the hydraulic adjusting element. Refer to CAMSHAFTS, REMOVING AND INSTALLING .

Final Procedures

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

-- Install the front noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .