11 37 006 Removing And Installing/Replacing Left Eccentric Shaft (N73)

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Cylinders 7 to 12.

Necessary Preliminary Tasks:

Read out DME fault memory.
Remove left cylinder head cover. Refer to 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N73) .
Remove all spark plugs. Refer to 12 12 011 REPLACING ALL SPARK PLUGS (N73) .
Remove inlet and exhaust VANOS on left side. Refer to 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST VANOS ON LEFT SIDE (N73) .
Remove left inlet camshaft. Refer to 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INLET CAMSHAFT (N73) .

NOTE: Removal of eccentric shaft is described separately from installation.

IMPORTANT: Eccentric shafts (1 to 6) and (7 to 12) are different and must not be mixed up. Magnet wheel is highly magnetic and must be protected against metal chips with a plastic bag.

Carefully tilt bearing shell (1) to one side and simultaneously remove towards top.

NOTE: The work steps are only described on one eccentric shaft bearing.

The procedure is identical for the other eccentric shaft bearings.

Fig 1: Removing Bearing Shell (Left)

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Remove eccentric shaft (1).

(Illustrations show N62).

Fig 2: View Of Eccentric Shaft (Left)

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Release screw and remove magnet wheel (1).

IMPORTANT: Magnet wheel (1) is extremely magnetic. After removal, place magnet wheel (1) in a plastic bag to protect it against metal chips.

Fig 3: Identifying Magnet Wheel (Left)

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Removal of lever (2) with roller (if necessary):

Grip lever (2) with roller at dihedral.

Release screw (1) and remove lever (2) with roller from eccentric shaft.

IMPORTANT: Levers with rollers of cylinders 1 to 6 and 7 to 12 are different and must not be mixed up.

Fig 4: Locating Screw And Lever With Roller (Left)

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Carefully press needle bearing (1) apart at split position only to such an extent that it can be removed from eccentric shaft.

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

Fig 5: Removing Needle Bearing (Left)

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Designation:

Lever (1) for cylinders 1 - 6.

Lever (2) for cylinders 7 - 12.

IMPORTANT: Lever with roller is identical to (N62).

They are different and must not be mixed up.

Markings 1 to 4 are for cylinders 1 to 6.

Markings 5 to 8 are for cylinders 7 to 12.

Fig 6: Identifying Levers For Cylinders 1 - 6 And 7 - 12 (Left)

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Secure lever (2) with lug in eccentric shaft groove.

Tighten screw (1).

Fig 7: Aligning Lug In Eccentric Shaft Groove (Left)

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Secure magnet wheel (1) with lug in eccentric shaft groove.

IMPORTANT: Replace screws.

Only install original antimagnetic screw (2).

Insert screw (2) and tighten down.

Installation:

Tightening torque, refer to 11 37 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 8: Securing Magnet Wheel With Lug In Eccentric Shaft Groove (Left)

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Install bearing shells (1) in such a way that ends of bearing shells (1) face each other as shown in illustration.

NOTE: Always replace bearing shells and needle bearings together.

Fig 9: View Of Bearing Shells Installation Alignment (Left)

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Install bearing shell (1) in bearing bracket and secure in bore (2).

NOTE: Apply a light coat of engine oil to bearing shells (1) when installing.

Fig 10: Installing Bearing Shell In Bearing Bracket (Left)

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Insert eccentric shaft.

Installation:

Lever (2) with roller points upwards in assembly position. Machined curvature of eccentric points inwards.

IMPORTANT: Eccentric shafts 1 to 6 and 7 to 12 are different and must not be mixed up.

Fig 11: View Of Lever In Assembly Position (Left)

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Install bearing shells (1).

Installation:

Apply a light coat of engine oil to bearing shells (1) when installing.

Bearing shells (1) must snap audibly into place.

Check correct position of bearing shells (1).

Fig 12: Installing Bearing Shells (Left)

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Install left inlet camshaft (7 to 12).

Assemble engine.