Removing and Installing/Replacing Left Eccentric Shaft (N62 Up To 09/03)

11 37 006 - Removing and installing/replacing left eccentric shaft (N62 to 09/03)

(cylinder bank 5 to 8)





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 inlet and exhaust adjustment unit on left side.
Remove left inlet camshaft Removing and Installing/Replacing Left Inlet Camshaft (N62 Up To 09/03).





Important!
Eccentric shafts up to 02/03:
Eccentric shafts of cylinders 1 to 4 and 5 to 8 are different and must not be mixed up. The side of the eccentric shaft on which the lever for the torsion spring is fitted must not be mixed up.
Eccentric shafts from 02/03:
Eccentric shafts of cylinders 1 to 4 and 5 to 8 are identical parts.
Depending on the side on which the lever for the torsion spring and the magnet wheel are fitted, the eccentric shafts are used for cylinders 1 to 4 or 5 to 8.





Removal
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.





Lift out eccentric shaft (1).





Removal of magnet wheel (if necessary):

Note:
Roller (2) must not rest against vise.
Clamp eccentric shaft (1) with front jaws on dihedral in a vise.





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).





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

Important!
Levers with rollers of cylinders 1 to 4 and 5 to 8 are different and must not be mixed up.

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





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.





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.





Installation
Installation of eccentric shaft is described separately from removal.





Important!
Danger of mix-up:

Version up to 2/03 of cylinder bank 5 to 8:
In the version up to 2/03, the eccentric shafts are different for cylinders 1 to 4 and 5 to 8 and must not be mixed up.
The eccentric shaft of cylinder bank 5 to 8 has the part number 7 513 755 stamped between cylinders 5 and 6 and has no "flat area" on the collar between cylinders 5 / 6 and 7 / 8.





Important!
Danger of mix-up:

Version up to 2/03 of cylinder bank 1 to 4:
The eccentric shaft of cylinder bank 1 to 4 has the part number 7 513 754 stamped between cylinders 3 and 4 and a "flat area" on the collar between cylinders 1 and 2.





Important!
Danger of mix-up:

If none of the markings described above are present, then the eccentric shaft will be a new-version shaft.
The new-version eccentric shafts are identical parts.
Depending on the side on which the lever for the torsion spring and the magnet wheel are fitted, the eccentric shafts are used for cylinders 1 to 4 or 5 to 8.





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.





Important!
Levers with rollers of cylinders 1 to 4 and 5 to 8 are different and must not be mixed up.

Identification
(1) - Lever with roller for cylinders 1 to 4

(2) - Lever with roller for cylinders 5 to 8





Important!
The position of the eccentric (3) is crucial to fitting the lever (2) and the installation direction in the bearing bridge described later.
Incorrect assembly will result in engine damage.

Cylinder bank 5 to 8:
As shown in the illustration, the machined surface (3) on the eccentric must point upwards and the groove in the eccentric shaft must be pointed upwards at an angle.
Align lever (2) with digits 5-8 pointing to groove in eccentric shaft and insert. Insert screw (1).
Grip lever (2) with roller at dihedral.
Tighten down screw (1).





Installation of magnet wheel:

Note:
Roller (2) must not rest against vise.
Clamp eccentric shaft (1) with front jaws on dihedral in a vise.





Important!
The position of the eccentric is crucial to fitting the magnet wheel (1) and the installation direction in the bearing bridge described later.
Incorrect assembly will result in engine damage.

Magnet wheel (1) is secured with a lug in groove in eccentric shaft.

Important!
Only install original antimagnetic screw (2).

Insert screw (2) and tighten down.
Tightening torque, 11 37 1AZ 11 37 Variable Valve Gear.





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.





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





Lubricate bearing shells (1) with engine oil.





Cylinder bank 5 to 8:

Important!
There is a danger of mixing up battery leads:
Machined curvature of eccentric points inwards.
Lever (2) with roller points towards front.

Install eccentric shaft as shown in illustration.





Lubricate bearing shells (1) with engine oil.
Install bearing shells (1).





Bearing shells (1) must snap audibly into place.
Check correct position of bearing shells (1).





Install left inlet camshaft Removing and Installing/Replacing Left Inlet Camshaft (N62 Up To 09/03).
Assemble engine.