Removing and installing/replacing intake camshaft (S55 engine)

Special tools required:

Necessary preliminary tasks:

NOTE: All bearing caps are identified with numbers from 1 to 6.

The front bearing cap is a thrust bearing and does not have an identification.

Release screws on thrust bearing cover.

Release screws on all bearing caps 1 to 6.

Set all bearing caps down in special tool 11 4 481 in a neat and orderly fashion.

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Remove intake camshaft (2) towards top.

Installation note:

Clean all bearing positions and lubricate with oil.

Check plain rectangular compression rings (1) for damage.

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Plastic plain rectangular compression ring:

Installation note:

The plastic plain rectangular compression rings are maintenance-free and do not have to be replaced.

Insert plastic plain rectangular compression ring (1) into groove of intake camshaft (2) (see arrow in illustration).

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Check the plastic plain rectangular compression rings (1 and 2) for freedom of movement.

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Attention!

Marks of intake and exhaust camshafts are different.

Mixing up the intake and exhaust camshaft will result in engine damage .

A Exhaust camshaft.

E Intake camshaft

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Insert intake camshaft so that data code (1) on mounting flats points upwards.

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Position intake camshaft so that the cams point diagonally upwards to the left.

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NOTE: All bearing caps are identified with numbers from 1 to 6.

The front bearing cap is a thrust bearing and does not have an identification.

Insert screws on all bearing caps 1 to 6.

Insert screws on thrust bearing cover.

Tightening torque 11 31 3AZ .

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Assemble engine.