Replacing all valve stem seals (B48 and B46 engine) (Cooper S and John Cooper Works)

Special tools required: 

• 11 1 480
• 11 1 960
• 11 6 380

Preliminary work needed: 

• Remove VALVE SPRINGS .

Removal: 

Disassemble the valve stem seal (1) with the special tool 11 1 480 in direction of arrow.

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Installation: 

Installation note: 

As an alternative to special tool 11 1 960, the assembly sleeves  delivered with the spare part can be used.

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Position special tool 11 1 960 or assembly sleeve on the valve (1).

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Position and guide in special tool 11 1 960 or assembly sleeve on the valve stem seal (1).

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Guide out and remove special tool 11 1 960 or assembly sleeves.

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Replace the valve stem seal (1).

Position the new valve stem seal (1) in special tool 11 6 380.

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Press on valve stem seal (1) to stop using special tool 11 6 380 in arrow direction.

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Required follow-up work: 

• Install VALVE SPRINGS .
• Assemble engine