11 31 032 Removing and installing/replacing left intake camshaft (N63 O1)

Special tools required: 

• 11 4 480 .

(cylinder bank 5 to 8) 

Necessary preliminary work: 

• Remove the FRONT AXLE COMPLETELY WITH THE ENGINE AND TRANSMISSION .
• Remove LEFT CYLINDER HEAD COVER .
• Check TIMING .
• Remove LEFT INTAKE ADJUSTMENT UNIT .
• Remove the TORSION SPRINGS for Valvetronic.

Release screws of camshaft bearings in 1/2 revolutions.

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

Remove the intake camshaft "E 58".

Fig 1: Identifying Camshaft Bearings

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Fig 2: Identifying Rocker Arm

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Check plastic plain rectangular compression rings (1) for freedom of movement.

Fig 3: Identifying Plastic Rings

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Plastic plain rectangular compression ring: 

Installation note: 

The plastic plain rectangular compression rings are maintenance free and do not have to be replaced.

Insert plastic plain rectangular compression ring (1) into groove of intake camshaft (2) (see arrow).

Lightly oil plastic plain rectangular compression ring (1) and rotate in direction of arrow until plastic plain rectangular compression ring (1) is positioned on the intake camshaft.

Fig 4: Inserting Plastic Rectangular Compression Ring Into Groove Of Exhaust Camshaft

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Fig 5: Identifying Markings On Cylinder Bank 5 to 8 Camshafts

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Insert intake camshaft (1).

Illustration: Cylinders 1 to 4.

Fig 6: Inserting Intake Camshaft

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Attach all bearing caps from (E1 to E5).

Screw all bearing caps.

Tightening torque: 11 31 6AZ .

Fig 7: Identifying Camshaft Bearings

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Install all intermediate levers with TORSION SPRINGS .

Install INTAKE ADJUSTMENT UNITS .

Adjust VALVE TIMING .

Assemble engine.