Timing Chain

Removing timing chain

Preliminary work

ATTENTION Damage to engine by turning crankshaft against the rotation direction of the engine (engine assembled)!
^ Never rotate crankshaft against the operating direction if the timing drive mechanism is mounted (timing chain jumps over).
^ Proceed carefully while working as otherwise the engine can be damaged.
^ Always turn the engine on the crankshaft and never on the camshaft as the timing chain may jump over.
^ After working on the camshaft wheels, the timing must be set.
^ Please observe the general warning notes and working regulations

1. Remove engine.
2. Remove cover for camshaft housing.
3. Remove chain case lid.

Information

Component overview











Removing timing chain

Note: If the timing chain has to be removed or replaced, check the guide and tensioning rails for wear and scoring and replace them if necessary.





Note:
^ The rolling direction of the timing chain must always be the same.
^ If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.

1. Loosen the fastening screws of the camshaft wheels and camshaft adjusters (1 or 2 turns). To do this, hold the a/f 32 hexagon of the camshaft adjuster and camshaft timing gear against the corresponding camshaft with a ring wrench. Loosen the M12 cheese head bolt by 1 or 2 turns with socket wrench insert T60.





2. Pull guide rails between the camshafts away from the threaded pegs. To do this, let timing chain dangle between the camshafts.

Note: If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.

3. Mark rolling direction of timing chain. Remove timing chain from all sprockets, pulling it forwards.