Chain Length, Checking
If due to complaints (for example noises) an elongated camshaft timing chain is suspected, the chain length can be checked as described as follows.
Procedure
-- Remove the noise insulation, refer to NOISE INSULATION OVERVIEW .
-- Remove right front wheel housing liner, refer to FRONT WHEEL HOUSING LINER .
-- Remove the bolts -arrows-.
-- Disconnect the air guide pipe by lifting the clamps -2- and opening the hose clamp -3-.
-- Remove the plug -arrow-. The plugs must be replaced.
-- Turn the vibration damper in direction of engine rotation until the chain tensioner piston is extended the maximum distance in the direction of -arrow-.
-- Count the visible piston splines.
The visible splines are all of the splines that are located to the right of the chain tensioner housing -arrow-.
- If six or fewer splines are visible: the camshaft timing chain must not be replaced.
- If seven or more splines are visible: the camshaft timing chain must be replaced, refer to CAMSHAFT TIMING CHAIN .