Removing and Installing/Replacing Exhaust Camshaft

11 31 025 - Removing and installing / replacing exhaust camshaft (M57T2)





Special tools required:
- 11 6 080 11 6 080 Plug Mandrel
- 11 6 252
- 11 6 254
- 11 6 321
- 11 6 322






Necessary preliminary tasks:
- Removing cylinder head cover Service and Repair
- Remove vacuum pump Service and Repair





Remove protective cap in direction of arrow.

Installation:
Reinstall protective cap with some grease.





Crank engine at central bolt.

Secure crankshaft at flywheel with special tool 11 6 080 11 6 080 Plug Mandrel.





Position (1) of inlet camshaft gear flush with cylinder head.

Position (2) of exhaust camshaft gear flush with cylinder head.





Evenly release bolts of camshaft bearing caps A1 to A7 in 1/2 turn steps from outside to inside.

Remove exhaust camshaft in direction of arrow.





Note:
Worn rockers may only be reused on the same grooves of the camshaft.





Important!
These screws must "not" be removed.





Note:
E - Inlet camshaft
A - Exhaust camshaft





Insert exhaust camshaft.

Position (1) of inlet camshaft gear flush with cylinder head.

Position (2) of exhaust camshaft gear flush with cylinder head.

If necessary, resecure camshafts.





Marking (1) on inlet camshaft must be between markings (2) on exhaust camshaft.

See illustration.





The exhaust camshaft bearing covers are marked A 1 ... A 7 from the exhaust side.

Oil all bearing points.

Fit bearing covers.

Insert all bolts and initially tighten without play.

Tighten down exhaust camshaft bearing caps in 1/2 turn increments evenly from inside to outside.





Cams of both camshafts must point to top right.

Place special tool 11 6 321 11 6 320 Locking Plug on exhaust camshaft.

Secure special tool 11 6 321 11 6 320 Locking Plug with special tool 11 6 322 11 6 320 Locking Plug.

Installation:
The exhaust camshaft only has to be checked, adjustment is not possible.





Secure special tool 11 6 254 to cylinder head with bolts (1).

Note:
See illustration.





Check exhaust camshaft axial clearance.

Set up special tool 11 6 252 with dial gauge.

Refer to Technical Data.

Note:
Illustration shows inlet camshaft.

Procedure for exhaust camshaft is identical.





If necessary, adjust valve timing Adjustments.

Assemble engine.