Removing Timing Chain

Removing timing chain





Tools and materials

Removing timing chain

Caution: Never twist the crankshaft the direction of movement!
Proceed carefully while adjusting as otherwise the engine can become damaged!
Only turn the engine on the crankshaft and never on the camshaft as the timing chain can jump over!
When working on the engine, absolute cleanliness is essential! Even the smallest particles of dirt can block up oil bores!
Please observe general warning notes and working regulations!

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

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





4. Loosen the fastening screws of the camshaft wheels and camshaft adjusters (1 or 2 turns). To do this, hold the SW 32 hexagon of the camshaft adjuster and camshaft wheel against the corresponding camshaft with a ring wrench. Loosen pan-head screw M12 by 1 or 2 turns with socket wrench insert T60.
5. Pull guide rails between the camshafts away from the threaded pegs. To do this, let timing chain dangle between the camshafts.

Figure shows guide rail with fitted chain case lid and timing chain.





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

6. Mark running direction of timing chain. Remove timing chain off all chain sprockets, pulling it forwards.