11 51 000 Removing and installing/replacing coolant pump (N55)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of scalding!
Only perform this work after engine has cooled down.

IMPORTANT: If a coolant pump that has already been operated is reused, it must be filled with coolant after removal.
Mixture ratio, water: coolant = 1: 1
Protect plug connections against coolant and contamination.

Recycling:

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste disposal regulations.

Installation note:

All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
Retaining elements on chassis and suspension and steering parts must be replaced.

Necessary preliminary tasks:

Follow diagnosis instructions.
Remove ENGINE SPLASH GUARD .
Drain COOLANT .
Remove THERMOSTAT .

Disconnect plug connection (1).

Release coolant hose (2).

Installation note:

Note installation hose clamps.

Tightening torque: 11 53 9AZ .

Fig 1: Identifying Plug Connection And Coolant Hose

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Release coolant hose (1).

Installation note:

Note installation hose clamps.

Tightening torque: 11 53 5AZ .

Fig 2: Releasing Coolant Hose

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Follow assembly instructions:

Installation note:

Hose clamps (1) must be installed in the center of the marked area (see Fig 3).

Fig 3: Identifying Hose Clamps

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Release screws (1).

Tightening torque: 11 51 2AZ .

Installation note:

Replace aluminum screws.

Fig 4: Identifying Aluminum Screws

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Unclip cable (1) from bracket.

Release screw (2).

Tightening torque: 11 51 2AZ .

Fig 5: Unclip Cable From Bracket And Screw

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Installation note:

If the electric coolant pump is reused, it must be rotated one turn due to the breakaway torque at the impellers.

Assemble engine.

BLEEDING INSTRUCTIONS must be observed without fail.