BMW 7 Series: Removing And Installing/Renewing Right Exhaust Camshaft (N63)

Notes

Cylinders 1-4:

IMPORTANT: Risk of damage! The exhaust camshaft must first be rotated in such a way that the camshaft is free from tension when the bearing caps are released.

Necessary preliminary work

• Remove right HIGH-PRESSURE PUMP
• Remove right CYLINDER HEAD COVER
• Remove right EXHAUST CAMSHAFT ADJUSTER

IMPORTANT: No cam on the exhaust camshaft is permitted to press directly onto a roller cam follower.

With cylinder no. 1 at 150º before TDC firing position there is no piston in the TDC position.

Rotate exhaust camshaft (2) at dihedron with a fork wrench into a suitable position.

Fig. 228: Rotating Exhaust Camshaft At Dihedron With Fork Wrench Into Suitable Position

NOTE: The intake camshaft of cylinder bank 5-8 is marked "E 5-8".

Fig. 229: Identifying Camshaft Of Cylinder Bank Mark

Release bolts of camshaft bearings in sequence (10 to 1) in 1/2 turns.

Set all bearing caps down in special tool 11 4 480 in a neat and orderly fashion.

Remove roller tappet from bearing caps (2 and 3) of high pressure pump and lay down in special tool 11 4 480.

Remove left exhaust camshaft and lay down in special tool 11 4 480.

Fig. 230: Identifying Camshaft Bearings Bolts Releasing Sequence

IMPORTANT: Rocker arms (1) of can slip slightly when inlet camshaft is fitted.

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

Align all rocker arms (1) straight.

Fig. 231: Identifying Rocker Arm

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

If necessary, replace plain compression rings (1).

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

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

Fig. 232: Locating Compression Ring End

Ends of compression rings (1) point upwards.

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

Coat all bearing positions with engine oil.

Fig. 233: Locating Bearing Positions

Install exhaust camshaft (1).

Turn exhaust camshaft (1) until cams point to side at cylinder no. 1 as shown in graphic.

Fig. 234: Identifying Exhaust Camshaft

IMPORTANT: Bearing caps of cylinders 1-4 and cylinders 5-8 must not be interchanged.

All bearing caps are coded and can only be installed in one position.

All bearing caps are marked with letters and numbers:

L= Cylinder bank 1-4.
R= Cylinder bank 5-8.
E= Intake side
A= Exhaust side
1= Marking, bearing point, from 1 to 5

Fig. 235: Identifying Bearing Caps Marks

Insert all bolts.

Tighten down bolts in sequence (1 to 10) in 1/2 turns.

Tightening torque 11 31 6AZ.

Tightening torque 11 31 7AZ.

Fig. 236: Identifying Camshaft Bearings Bolts Tightening Sequence

Install right INLET AND EXHAUST CAMSHAFT ADJUSTERS.

Adjust VALVE TIMING.

Assemble engine.

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