11 31 025 Removing and installing/replacing intake camshaft (B48B)

Special tools required: 

• 11 4 480

Necessary preliminary work: 

• Check TIMING 
• Remove INTAKE ADJUSTER 
• Remove INTERMEDIATE LEVER 

Removal: 

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Release all screws on bearing caps in the sequence 10 - 1  in 1/2 turns.

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

Fig 1: Intake Camshaft Bearing Caps Screws Loosening Sequence

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Take intake camshaft (1) out of cylinder head.

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Installation: 

Moisten all bearing positions (1) with engine oil.

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Engage intake camshaft in cylinder head so that data code (1) is pointing upwards.

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Coat intake camshaft and bearing shells with engine oil.

Position all bearing shells on cylinder head.

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Installation note: 

Check the tensile strength of the screws for the bearing caps.

The figure shows the screw with the tensile strength of 8.8  .

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Installation note: 

Check the tensile strength of the screws for the bearing caps.

The figure shows the screw with tensile strength of 10.9  .

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Press down the bearing caps and gradually tighten the screws in the sequence 1 - 10  so that they are hand-tight.

Join  screws in sequence 1-10  in half turns.

Observe jointing torque 11 31 1AZ

Tighten  all screws in sequence from 1 - 10  .

Tightening torque 11 31 1AZ .

Fig 2: Intake Camshaft Bearing Caps Screws Tightening Sequence

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Required follow-up work: 

• Installing INTERMEDIATE LEVER 
• Install INTAKE ADJUSTER 
• Check TIMING