Timing Chain, Checking: Procedure

Preliminary work may be required depending on the model. Refer to TIMING CHAIN COVER [CNSB, CNTC, CYFB] .

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

Courtesy of AUDI OF AMERICA, LLC

Courtesy of AUDI OF AMERICA, LLC

-- 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 direction of -arrow-.

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 teeth are visible, the timing chain must not be replaced.
• If six or fewer teeth are visible and there is an entry in the DTC memory: adjust the chain length using the :VAS5570  , 01 - Chain Length Adaptation Diagnosis  and delete the DTC memory.
• If seven or more teeth are visible: replace the camshaft timing chain. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .

There are additional procedures depending on the model. Refer to TIMING CHAIN COVER [CNSB, CNTC, CYFB] .