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 a 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 Removing .

-- Join the tools as shown.

Fig 1: Identifying Crankshaft Turning Tool, Wrench - 21 MM And Adapter

Courtesy of AUDI OF AMERICA, LLC

1. Socket 21 mm for ¹ /₂ "-drive

Fig 2: Identifying Wrench - 21 MM T40263

Courtesy of AUDI OF AMERICA, LLC

-- Turn the crankshaft in direction of engine rotation until the cam on the balancing element being checked is at the top.

-- To determine the play between cam lobes and roller rocker lever, press the lever down with a plastic wedge in direction of -arrow-.

Fig 3: Identifying Play Between Cams With Screwdriver And 0.20 mm Feeler Gauge

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 adjusting element.

• Refer to CAMSHAFTS, REMOVING, USED CAMSHAFTS, REINSTALLING ON CYLINDER BANK 1 (RIGHT) 
• Refer to CAMSHAFTS, REMOVING, USED CAMSHAFTS, REINSTALLING ON CYLINDER BANK 2 (LEFT)