Chain Length, Checking

WARNING: This page is about a different car, the 2022 Audi A6 Quattro and 2021 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

-- Remove the noise insulation (front). Refer to OVERVIEW - NOISE INSULATION .

-- Remove the plug -arrow-.

Fig 1: Identifying Plug

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-- Turn the vibration damper 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

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-- 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 Vehicle Diagnostic Tester, 0001 - Chain Length Adaptation Diagnosis and delete the DTC memory.
If seven or more teeth are visible: replace the camshaft timing chain.

Tightening Specifications

Refer to OVERVIEW - NOISE INSULATION .