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: Identifying Hexagon Head Of Camshafts

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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 Cap Bolts Tightening/Loosening Sequence (N63)

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Do "not" remove rocker arms (1) on exhaust side.

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.

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

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Fig 5: Identifying Camshafts 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.

Install exhaust camshaft (1).

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

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

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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

Fig 8: Identifying Bearing Cap Markings

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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 .

Insert tappets for high-pressure pump.

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

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Install INLET ADJUSTMENT UNITS .

Adjust VALVE TIMING .

Assemble engine.