11 31 032 Removing and installing/replacing left intake 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 INTAKE ADJUSTMENT UNIT .

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

Fig 1: Checking Locking Of Camshaft Adjusters In Initial Setting

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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 .

Intake camshaft

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

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Fig 3: Identifying Rocker Arms

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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.

Fig 4: Identifying Plain Rectangular Compression Rings

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

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

Fig 5: Identifying Camshaft Markings

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Align all rocker arms (1) straight.

Fig 6: Identifying Rocker Arms

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Coat all bearing positions with engine oil.

Insert intake camshaft.

Fig 7: Locating Bearing Positions

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

Fig 8: Inserting Intake Camshaft

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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 Identification Markings

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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 10: Left Intake Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)

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Install INTAKE ADJUSTMENT UNITS .

Adjust VALVE TIMING .

Assemble engine.