11 37 005 Removing and installing/replacing eccentric shaft (N55)

Special tools required:

11 4 481

Necessary preliminary tasks:

Remove CYLINDER HEAD COVER .
Remove SERVOMOTOR FOR ECCENTRIC SHAFT DRIVE .
Remove INTERMEDIATE LEVER .

NOTE: All bearing caps (1) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).

Release screws on bearing caps 1 to 6 (1).

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

Remove eccentric shaft with gentle tilting and swivel motion.

Fig 1: Identifying Bearing Caps

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Place eccentric shaft on special tool 11 4 481 .

IMPORTANT: Needle bearings (1) can break very easily.

Installation note:

Replace eccentric shaft.

Carefully pull needle bearing (2) apart at point of separation.

Slide on all needle bearings (1) of eccentric shaft.

Fig 2: Installing All Needle Bearings Of Eccentric Shaft

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Install bearing shells (1) as pictured.

NOTE: If bearing shells need to be replaced due to a defect, always replace bearing shells (1) and needle bearings together.

Fig 3: Installing Bearing Shells

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Installation note:

Any installation position may be selected for bearing shells (1 and 2).

If bearing shells (1) in cylinder head are inserted with tips pointing downward, the bearing shells (2) must be inserted in the opposite direction in the bearing cap (see example in illustration).

Fig 4: Installing Bearing Shells

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Installation note:

All bearing caps (1) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).

Insert eccentric shaft.

Coat all bearing positions with engine oil.

Put on all bearing caps (1) according to cylinder assignment.

Insert all screws.

Fig 5: Identifying Bearing Caps

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Tightening torque 11 31 2AZ .

Installation note:

Gearing of eccentric shaft must be greased with LONGTIME PD 1 (2.4) .

Check intermediate shaft for ease of movement.

Assemble engine.