Removing and Installing/Replacing Right Exhaust Camshaft

Removing And Installing/Replacing Right Exhaust Camshaft (N62)
(Cylinder Bank 1 to 4)

Removal
Removal of exhaust camshaft is described separately from installation.

Remove servomotor for right eccentric shaft.

Remove ignition coils on cylinder bank 1 to 4.

Remove right cylinder head cover.

Remove spark plugs on cylinder bank 1 to 4.

Remove inlet and exhaust adjustment unit on right side.

Remove slide rail (1).

Rotate exhaust camshaft at hexagon head against direction of rotation until exhaust cam on cylinder (2) faces upwards.

Caution: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

Note: Bearing caps of exhaust camshaft are marked on cylinder bank 1 to 4 with L A1 to L A5 from inlet side.

Release nuts and remove bearing cap L A1.

Note:
Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Release nuts on bearing caps L A2 to L A5.

Remove bearing caps L A2 to L A5.

Remove exhaust camshaft (1).

If necessary, replace plain compression rings (1).

Caution: Plain compression rings (1) can easily break.

Plain compression rings (1 ) are engaged at joint.

Press compression ring (1) on one side into groove, pull up on other side and remove catch.

Carefully pull compression ring (1) apart and remove towards front.

If necessary, replace sensor gear (1).

Release screw (2) and remove sensor gear (1).

Installation
Installation of exhaust camshaft is described separately from removal.

Clean all bearings and cams of exhaust camshaft and lubricate with engine oil.

Note: Camshaft has a groove and sensor gear has a lug for fastening purposes.

Fit sensor gear (1) and align to groove in camshaft.

Insert screw (2) and tighten down.
Sensor gear to camshaft
M16 x 1.5 30 Nm

Installing compression rings (1):

Caution: Plain compression rings (1) can easily break.

Carefully pull compression ring (1) apart and install from front.

Press compression ring (1) on one side into groove, install catch on other side.

Note:
Rocker arms (1) of exhaust camshaft are of same design as rocker arms of inlet camshaft.
The classification 3 shown in the illustration has no affect on the function on the exhaust camshaft.

Caution:
Rocker arms (1) slip slightly when exhaust camshaft is fitted.

Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Used rocker arms (1 ) may only be reused in the same position.

Align rocker arms (1) straight.

Lubricate exhaust camshaft and bearing caps with engine oil.

Install exhaust camshaft (1).

Rotate exhaust camshaft (1) until exhaust cam on cylinder 2 is facing upwards.

Check adapter sleeves (2) for damage and correct installation position.

Ends of compression rings (1 ) point upwards.

Make sure compression rings (1) are engaged at ends.

Note:
Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Insert nuts and tighten by hand without play.

Tighten down nuts on bearing caps L A2 to L A5 in 1/2 turn increments evenly from inside to outside.
Camshaft bearing cap
M6 10 Nm
M7 14 Nm
M8 20 Nm

Caution: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

Fit bearing cap L Al in such a way that marking is legible from inlet side.

Install nuts and tighten down.
Camshaft bearing cap
M6 10 Nm
M7 14 Nm
M8 20 Nm

Note: A gasket (2) is installed between cylinder head and slide rail (1).

Replace gasket (2) and preinstall on slide rail (1).

Install slide rail (1 ) with gasket, insert screw and tighten down.

Rotate exhaust camshaft against direction of rotation until cam on 1st cylinder points upwards at an angle as shown in illustration.

Install inlet and exhaust adjustment unit on right side.

Install spark plugs on cylinder bank 1 to 4.

Install right cylinder head cover.

Install ignition coils on cylinder bank 1 to 4.

Assemble engine.