Removing and installing/replacing intake camshaft (B48A/B46A) (Cooper S and John Cooper Works)

Special tools required:

Preliminary work needed:

Removal:

NOTE: The bearing caps are legibly labeled with (E1 - E4) on the intake side.
Bearing cap (E) is a thrust bearing.

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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: 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 motor oil.

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

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NOTE: Check adapter sleeves (1) for damage and firm seating.

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Coat intake camshaft and bearing shells with motor oil.

Position all bearing shells on cylinder head.

NOTE: The bearing caps are legibly labeled with (E1 - E4) on the intake side.
Bearing cap (E) is a thrust bearing.

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Installation note:

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

The illustration shows the screw with a tensile strength of 8.8.

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Installation note:

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

The illustration shows the screw with a tensile strength of 10.9.

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Press down on the bearing caps and hand tighten the screws incrementally in the sequence 1 - 10.

Join the screws in the sequence 1 - 10 in half turns.

Observe the joining torque 11 31 1AZ . .

Tighten all screws in the sequence 1 - 10.

Tightening torque 11 31 1AZ . .

Fig 2: Bearing Caps Screws Tightening Sequence

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Required follow-up work: