11 37 005 Removing and installing/replacing eccentric shaft (N52)

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Special tools required:

11 4 481 .

Necessary preliminary work:

Remove CYLINDER HEAD COVER .
Remove INTERMEDIATE LEVER .

If necessary, move eccentric shaft (1) on mounting flats to minimum lift (2).

Fig 1: Moving Eccentric Shaft On Mounting Flats To Minimum Lift

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NOTE: All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).
Bearing cap 6 (1) is provided with a stop.

Release screws on bearing cap 6 (1).

Release screws on bearing caps 1 to 5 (2).

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

Fig 2: Identifying Bearing Caps

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Remove eccentric shaft with gentle tilting and swivel motion.

IMPORTANT: Screw is not magnetic and must be secured against falling down.

Release screw.

Remove magnet wheel (1).

Fig 3: Identifying Magnet Wheel

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IMPORTANT: Magnet wheel (1) is highly magnetic and must be protected against metal filings/borings.

After removing, place magnet wheel (1) in a plastic bag (2) with a seal.

Fig 4: Placing Magnet Wheel In Plastic Bag

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

Carefully pull needle bearing (1) apart at point of separation.

Remove all needle bearings (1) from eccentric shaft.

Installation:

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

Fig 5: Removing Needle Bearings From Eccentric Shaft

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Install bearing shells (1) as pictured.

NOTE: Always replace bearing shells (1) and needle bearings together.

Fig 6: Identifying Bearing Shells

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Install bearing shell (1) with tip facing down (see arrow) in cylinder head.

Install bearing shell (2) with tip facing up in bearing cap.

Fig 7: Installing Bearing Shells

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NOTE: All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).
Bearing cap 6 (1) is provided with a stop.

Insert eccentric shaft.

Adjust eccentric shaft on mounting flats to minimum stroke.

Fit all bearing caps (1 and 2).

Fig 8: Identifying Bearing Caps

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Insert all screws.

Tightening torque 11 12 7AZ .

Installation:

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

Assemble engine.