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11 31 032 Removing and installing/replacing left inlet camshaft (N63)

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Special tools required: 

IMPORTANT: The intake camshaft must first be rotated in such a way that the camshaft is free from tension when the bearing caps are released (risk of damage)  .

Necessary preliminary tasks: 

IMPORTANT: No cam on the inlet camshaft is permitted to press directly onto a roller cam follower.
With cylinder no. 1 at 150° before TDC firing position  there is no piston in the TDC position.

Rotate left inlet camshaft at dihedron with a fork wrench (1) into a suitable position.

Fig 1: Identifying Hexagon Head Of Camshafts
G10042780Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Intake camshaft

Fig 2: Left Intake Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)
G10042781Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Used rocker arms (1) may only be reused in the same position.
NOTE: Rocker arms (1) are freely accessible after inlet camshaft has been removed.

Do "not" remove rocker arm (1) on intake side.

Fig 3: Identifying Rocker Arms
G10042782Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Plain rectangular compression rings (1) can easily break.

If necessary, replace plain compression rings (1).

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

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

Ends of plain rectangular compression rings (1) point upwards.

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

Fig 4: Locating Plain Rectangular Compression Rings
G10042783Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: The intake camshaft of cylinder bank 5 to 8 is marked with "E 5-8".
Fig 5: Identifying Camshafts Markings
G10042784Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Rocker arms (1) 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 6: Identifying Rocker Arms
G10042785Courtesy of BMW OF NORTH AMERICA, INC.

Coat all bearing positions with engine oil.

Insert intake camshaft.

Fig 7: Locating Bearing Positions
G10042786Courtesy of BMW OF NORTH AMERICA, INC.

Insert inlet camshaft (1) so that cams point to side at cylinder 5 as shown in illustration.

Fig 8: Identifying Inlet Camshaft With Cams Pointing To Side At Cylinder 5
G10042787Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do not mix up the bearing caps of cylinders 1 to 4 and 5 to 8.
All bearing caps are coded and can only be installed in one position.

All bearing caps are marked:

L = Cylinders 1 - 4.

R= Cylinders 5 - 8.

E = Intake side

A = Exhaust side

1 = designation from 1 to 5

Fig 9: Identifying Bearing Cap Markings
G10042788Courtesy of BMW OF NORTH AMERICA, INC.

Insert all bolts.

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

Tightening torque: 11 31 6 AZ .

Tightening torque: 11 31 7 AZ .

Install INLET ADJUSTMENT UNITS .

Fig 10: Left Intake Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)
G10042789Courtesy of BMW OF NORTH AMERICA, INC.

Adjust VALVE TIMING .

Assemble engine.

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