11 37 005 Removing and installing/replacing eccentric shaft (N52K)

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Special tools required:

11 4 481

Necessary preliminary tasks:

Remove Cylinder Head Cover
Remove Intermediate Lever

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Fig 1: Eccentric Shaft, Minimum Lift And Removal Directions

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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 tidy and orderly fashion.

Remove eccentric shaft with gentle tilting and turning movements.

Fig 2: Eccentric Shaft Bearing Caps

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

Release screw.

Remove magnet wheel (1).

Fig 3: Magnet Wheel And Screw

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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.

Fig 5: Needle Bearings And Separation Points

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Install bearing shells (1) as pictured.

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

Fig 6: 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: Bearing Shells And Installation Orientation Direction

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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 dihedron to minimum stroke.

Fit all bearing caps (1 and 2).

Insert all screws.

For tightening torque refer to 11 12 7AZin 11 12 CYLINDER HEAD WITH COVER (1AZ-9AZ) [N52K] .

Fig 8: Eccentric Shaft Bearing Caps

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Assemble engine.