Timing Chain, Checking

Special tools and workshop equipment required

Wrench - 21mm: T40263
Adapter: T40314

If an elongated camshaft timing chain is suspected based on complaints (for example noises), the timing chain can be checked as described in the following.

Procedure

-- Remove the right front wheel housing liner. Refer to FRONT WHEEL HOUSING LINER, REMOVING AND INSTALLING .

-- Remove the plug -arrow-. The plugs must be replaced.

Fig 1: Identifying Plug

Courtesy of AUDI OF AMERICA, LLC

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Risk of damaging the engine by the timing mechanism skipping.

- Only let the engine turn in the direction of engine rotation.

-- Turn the crankshaft with : T40263 , : T40314 and a 24 mm socket only in the direction of engine rotation -arrow-.

-- Turn the crankshaft in direction of engine rotation until the chain tensioner piston is extended the maximum distance in the direction of -arrow-.

Fig 2: Identifying Vibration Damper

Courtesy of AUDI OF AMERICA, LLC

-- Count the visible piston teeth.

TIP:

The visible teeth are all of the teeth that are located to the right of the chain tensioner housing -arrow-.

If six or fewer splines are visible: the camshaft timing chain does not need to be replaced.
If seven or more splines are visible: the camshaft timing chain must be replaced. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .

Tightening Specifications

Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .