11 53 090 Removing and installing/replacing auxiliary water pump for exhaust turbocharger (N74)

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WARNING: Risk of scalding!

Only perform this work after engine has cooled down.

Recycling:

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste disposal regulations.

Necessary preliminary tasks:

Remove FAN COWL .
Remove STIFFENING PLATE
Drain COOLANT .

Unfasten snap fastener (1), pull off coolant hose (2) and lay to one side

Fig 1: Identifying Snap Fastener And Coolant Hose

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!

Coolant emerges when the coolant hoses are detached from the auxiliary water pump.

Cover surrounding components and plug connections with suitable apparatus

Fig 2: Identifying Coolant Pump Plug Connection, Hose Clamps And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Release hose clamps (2, 3) with a suitable tool.

Pull off coolant hoses and lay to one side.

Release screws (4) and remove coolant pump.

Installation note:

plug connection (1) must snap audibly into place!

Modify holder if replacing auxiliary water pump.

Assemble engine.

Top up COOLANT .

VENTING INSTRUCTIONS must be observed without fail .