BMW X5: Removing And Installing/Replacing Left Eccentric Shaft (N62 From 9/03 And N62TU)

(cylinder bank 5 to 8)

Necessary preliminary tasks:

• Remove servomotor for left eccentric shaft.
• Remove ignition coils on cylinder bank 5 to 8.
• Remove spark plugs on cylinder bank 5 to 8.
• Remove left cylinder head cover.
• Remove left inlet and exhaust adjustment units.
• Remove left inlet camshaft.

Eccentric shafts from 2/2003:

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

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. 610: Tilting Bearing Shell

Lift out eccentric shaft (1).

Fig. 611: Identifying Eccentric Shaft

Removal of magnet wheel (if necessary):

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

Fig. 612: Identifying Eccentric Shaft Clamp

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. 613: Identifying Magnet Wheel

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. 614: Pressing Needle Bearings

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. 615: Identifying Bearing Shell

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. 616: Pressing Needle Bearings

Eccentric shafts from 2/2003:

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

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. 617: Identifying Eccentric Shaft Clamp

IMPORTANT: Incorrect assembly will result in engine damage.

Assembling 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 11 37 1AZ.

Fig. 618: Identifying Machined Curvature And Magnet Wheel

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. 619: Identifying Bearing Shells

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

Fig. 620: Inserting Bearing Shells Into Bearing Bracket

Lubricate bearing shells (1) with engine oil.

Fig. 621: Identifying Bearing Shell

Cylinder bank 5 to 8:

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

Install eccentric shaft as shown in graphic.

Fig. 622: Identifying Machined Curvature Of Eccentric Points

Lubricate bearing shells (1) with engine oil.

Install bearing shells (1).

Fig. 623: Installing Bearing Shells

Bearing shells (1) must snap audibly into place.

Check correct position of bearing shells (1).

Fig. 624: Identifying Bearing Shells Position

Install left inlet camshaft.

Assemble engine.

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