11 31 038 Removing and installing/replacing right exhaust camshaft (S63)

Special tools required: 

• 11 4 480 .

Cylinders 1-4: 

Necessary preliminary tasks: 

• Remove right HIGH-PRESSURE PUMP .
• Remove right CYLINDER HEAD COVER .
• Remove EXHAUST CAMSHAFT ADJUSTER on right side.

Rotate exhaust camshaft (2) at dihedron with a fork wrench into a suitable position.

Fig 1: Checking Locking Of Exhaust Camshaft Adjusters In Initial Setting

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Release screws in sequence (10 to 1) in 1/2 turns.

Set all bearing caps down in special tool 11 4 480 in a neat and orderly fashion.

Remove roller tappet from bearing caps (2 and 3) of high pressure pump and lay down in special tool 11 4 480 .

Graphic shows N63.

Fig 2: Right Exhaust Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (S63)

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Remove right exhaust camshaft right and place in special tool 11 4 480 .

Fig 3: Identifying Exhaust Camshaft

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Plastic rings (1) are maintenance-free and must not be replaced.

Check plastic rings for damage.

Fig 4: Identifying Plastic Rings

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Plastic plain rectangular compression ring: 

Plastic plain rectangular compression rings are already pre-installed on a new camshaft.

Plastic plain rectangular compression rings (1) are maintenance-free and must be replaced if damaged.

Insert plastic rectangular compression ring (1) into groove of exhaust camshaft (2) (see arrow).

Fig 5: Inserting Plastic Rectangular Compression Ring Into Groove Of Exhaust Camshaft

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Lightly oil plastic rectangular compression ring (1) and rotate in direction of arrow until compression ring (1) is positioned on the exhaust camshaft.

Align all rocker arms (1) straight.

Fig 6: Aligning Rocker Arms

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Coat all bearing positions with engine oil.

Insert exhaust camshaft (1) with identification (2) A 14  towards top.

Fig 7: Identifying Exhaust Camshaft

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Position all bearing caps by number.

Tighten down bolts in sequence (1 to 10) in 1/2 turns.

Tightening torque 11 31 6AZ .

Tightening torque 11 31 7AZ .

Fig 8: Right Exhaust Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (S63)

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Use an open-end spanner (1) at hexagon head with to twist camshaft (2) into position.

Fig 9: Checking Locking Of Exhaust Camshaft Adjusters In Initial Setting

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Exhaust cams at cylinder 4 of exhaust camshaft must point inwards crosswise (see Fig 10).

Fig 10: Identifying Correct Cam Positions

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Install right INTAKE AND EXHAUST CAMSHAFT ADJUSTERS .

Adjust VALVE TIMING .

Assemble engine.