11 37 006 Removing and installing/replacing left eccentric shaft (N62 from 9/03): Removal

WARNING: This page is about a different variant/trim than selected.

Removal of eccentric shaft is described separately from installation.

NOTE: The work steps are only described on one bearing position. The procedure is identical for the other bearing positions.

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

Fig 1: Tilting Bearing Shell

Courtesy of BMW OF NORTH AMERICA, INC.

Lift out eccentric shaft (1).

Fig 2: Lifting Out Eccentric Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Removal of magnet wheel (if necessary):

NOTE: Carefully clamp eccentric shaft (1) as illustrated with protective jaws (2) in a vice.

Fig 3: Clamping Eccentric Shaft With Protective Jaws In Vice

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Danger of mix-up:

It is very easy to mix up left and right or front and rear on the eccentric shaft.

If necessary, mark the side on which the magnet wheel is fitted.

NOTE: Magnet wheel (1) is extremely magnetic.

After removal, place magnet wheel in a plastic bag to protect it against metal chips.

Release screw and remove magnet wheel (1).

Fig 4: Removing Magnet Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Needle bearings (1) break off very easily when removed and installed.

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

Fig 5: Pressing Needle Bearings

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If the needle-roller bearings are replaced, the bearing shells must be replaced as well.

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

Fig 6: Pressing Bearing Shell

Courtesy of BMW OF NORTH AMERICA, INC.

Installation

Installation of eccentric shaft is described separately from removal.

NOTE: Lubricate eccentric shaft at bearing positions.

Replace needle bearing (1).

IMPORTANT: Needle bearings break off very easily when installed.

Carefully press needle bearings (1) apart at split position only to such an extent that they can be fitted over eccentric shaft.

Fig 7: Replacing Needle Bearing

Courtesy of BMW OF NORTH AMERICA, INC.

Eccentric shafts from 2/2003:

NOTE: Eccentric shafts of cylinders 1 to 4 and 5 to 8 are identical parts.

IMPORTANT: Note installation direction of eccentric shafts.
Depending on the side on which the magnet wheel is fitted, the eccentric shafts are used for cylinders 1 to 4 or 5 to 8.
Incorrect assembly will result in engine damage.

Installation of magnet wheel:

NOTE: Carefully clamp eccentric shaft (1) as illustrated with protective jaws (2) in a vice.

Fig 8: Clamping Eccentric Shaft With Protective Jaws In Vice

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Incorrect assembly will result in engine damage.

Assemble eccentric shaft for cylinder bank 5 to 8:

The machined curvature (3) and the groove in the eccentric shaft must point forwards as illustrated.

The unmachined surface on the eccentric points to the left.

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

IMPORTANT: Only install original antimagnetic screw (2).

Insert screw (2) and tighten down.

Tightening torque, see ENGINE - TIGHTENING TORQUES .

Fig 9: Installing Original Antimagnetic Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Replace bearing shells (1) of needle bearings.

IMPORTANT: Bearing shells (1) must be installed in such a way that ends of bearing shells (1) face each other as shown in illustration.

Fig 10: Identifying Bearing Shells Of Needle Bearings

Courtesy of BMW OF NORTH AMERICA, INC.

Insert bearing shells (1) into bearing bracket so that it is secured in bore (2).

Fig 11: Inserting Bearing Shells Into Bearing Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Lubricate bearing shells (1) with engine oil.

Fig 12: Lubricating Bearing Shells With Engine Oil

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

IMPORTANT: The machined curvature (1) of the eccentric points inwards.

Install eccentric shaft as shown in illustration.

Fig 13: Installing Eccentric Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Lubricate bearing shells (1) with engine oil.

Install bearing shells (1).

Fig 14: Installing Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.

Bearing shells (1) must snap audibly into place.

Check correct position of bearing shells (1).

Fig 15: Identifying Correct Position Of Bearing Shells

Courtesy of BMW OF NORTH AMERICA, INC.