11 31 025 Removing and installing or replacing the exhaust camshaft (M57T2-SCR)

Special tools required

11 6 080
11 6 252
11 6 254
11 6 321
11 6 322

Necessary preliminary work

Remove protective cap in direction of arrow.

Installation note:

Reinstall protective cap with some grease.

Fig 1: Removing Protective Cap

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Crank engine at central bolt.

Secure crankshaft at flywheel with special tool 11 6 080 .

Fig 2: Securing Crankshaft At Flywheel With Special Tool (11 6 080)

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

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

Fig 3: Identifying Marking On Intake And Exhaust Camshaft

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Evenly release bolts of intake camshaft bearing caps A1 to A7 in 1/2 revolution increments from outside to inside.

Remove exhaust camshaft in direction of arrow.

Fig 4: Identifying Exhaust Camshaft Bolts

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NOTE: Worn rocker arms may only be reused on the same grooves of the camshaft.

Fig 5: Identifying Rocker Arms And Compensating Elements

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IMPORTANT: These screws must "not" be removed.

Fig 6: Caution For Camshaft Screws

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NOTE: E Intake camshaft
A Exhaust camshaft

Fig 7: Identifying Inlet And Exhaust Camshaft Marks

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Insert exhaust camshaft.

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

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

If necessary, re-secure camshafts.

Fig 8: Identifying Marking On Intake And Exhaust Camshaft

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

See graphic.

Fig 9: Identifying Intake Camshaft Gear And Exhaust Sprocket Wheel Marks

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

Oil all bearing positions.

Fit bearing caps.

Insert all bolts and initially tighten without play.

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

Fig 10: Identifying Exhaust Camshaft Bolts

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Cams of both camshafts must point to top right.

Place special tool 11 6 321 on exhaust camshaft.

Secure special tool 11 6 321 with special tool 11 6 322.

Installation note:

The exhaust camshaft only has to be checked, setting is not possible.

Fig 11: Attaching Special Tool (11 6 321) To Exhaust Camshaft

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Secure special tool 11 6 254 on the cylinder head with screws (1).

NOTE: See graphic.

Fig 12: Securing Special Tool (11 6 254) Onto Cylinder Head With Screws

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Check exhaust camshaft side clearance.

Set up special tool 11 6 252 with dial gauge.

Refer to TECHNICAL DATA .

NOTE: Illustration shows intake camshaft.

Procedure for exhaust camshaft is identical.

Fig 13: Checking Camshaft Axial Clearance

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If necessary, adjust VALVE TIMING .

Assemble engine.