Removing and installing/replacing auxiliary water pump (B48 and B46 engine) (Cooper S and John Cooper Works)

Preliminary work needed: 

• Drain COOLANT .

Removal: 

Remove screw (1).

Pull the auxiliary coolant pump (2) slightly forwards.

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Unlock and disconnect the connector (1) of the auxiliary coolant pump.

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Unlock coolant hose (1) and detach auxiliary coolant pump.

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Unlock coolant hose (1) and detach auxiliary coolant pump (2).

Remove auxiliary water pump (2).

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Installation: 

Install auxiliary coolant pump (1).

Connect coolant hose (2) to auxiliary coolant pump (1).

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Connect coolant hose (1) to auxiliary coolant pump.

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Connect the connector (1).

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Fasten auxiliary coolant pump with screw (1).

Tightening torque 11 51 4AZ .

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Required follow-up work: 

• Top up COOLANT .
• Check cooling system for tightness.