Camshaft: Testing and Inspection

11 31 005 - Checking camshaft timing





Special tools required:
- 11 0 300 11 0 300 Mandrel
- 11 4 281
- 11 4 282
- 11 4 283





Necessary preliminary tasks:
- Remove cylinder head cover Service and Repair.
- Remove front splash guard.





Remove fastener (1) in direction of arrow.

Installation:
Install fastener (1) with bore facing outwards.





Rotate crankshaft at central bolt into TDC position.
Slide in special tool 11 0 300 in direction of arrow and block crankshaft. 11 0 300 Mandrel

Important!
On engines with automatic transmissions, there is shortly before the special tool bore for the TDC position a large bore which can be confused with the special tool bore.

If the flywheel is secured in the correct bore with special tool 11 0 300, the engine can no longer be moved at the central bolt. 11 0 300 Mandrel





The timings are correct when the part number (2) can be read from above on the camshafts (1).





With 1st cylinder in firing TDC position, cams of inlet camshaft (1) at 1st cylinder point upwards at an angle.





With 1st cylinder in firing TDC position, cams of exhaust camshaft (3) at 6th cylinder point downwards at an angle.
Roller cam follower (1) is not actuated.

Note:
If the timing is checked while the engine is installed, the position of the camshaft can only be checked with a mirror.





Secure special tool 11 4 283 on cylinder head with screws (1).

Note:
Fit special tool 11 4 282 underneath on inlet side.

Mount special tool 11 4 281 on inlet and exhaust camshafts.





If necessary, adjust valve timing Adjustments.
Assemble engine.