11 31 036 Removing and installing/replacing left exhaust camshaft (N63)

Special tools required: 

• 11 4 480

  (cylinder bank 5 to 8) 

Necessary preliminary tasks: 

• Remove LEFT CYLINDER HEAD COVER .
• Check TIMING .
• Remove LEFT INLET ADJUSTMENT UNIT .

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

Fig 1: Checking Locking Camshaft Adjusters

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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 .

Remove roller tappet from bearing cap (2 and 3) of high pressure pump and set down on special tool 11 4 480 .

Remove left exhaust camshaft and set down on special tool 11 4 480 .

Fig 2: Left Exhaust Camshaft Bearing Bolts Tightening/Loosening Sequence (N63)

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Fig 3: Identifying Rocker Arm

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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: Identifying Plain Rectangular Compression Rings

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Fig 5: Identifying Camshafts

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Align all rocker arms (1) straight.

Fig 6: Identifying Rocker Arm

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Coat all bearing positions with engine oil.

Install exhaust camshaft (1).

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

Fig 7: Identifying Exhaust Camshaft With Cams Pointing To Side At Cylinder 5

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Fig 8: Identifying Bearing Cap Markings

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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

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 .

Insert tappets for high-pressure pump.

Fig 9: Left Exhaust Camshaft Bearing Bolts Tightening/Loosening Sequence (N63)

Courtesy of BMW OF NORTH AMERICA, INC.

Install INLET ADJUSTMENT UNITS .

Adjust VALVE TIMING .

Assemble engine.