11 51 000 Removing and installing/replacing coolant pump (N20)

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 dirt contamination.

Recycling:

Catch and dispose of drained coolant in a suitable collecting vessel.

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 instruction.
Drain COOLANT .
Notes COOLING SYSTEM .
Remove CLEAN AIR PIPE .
Remove UNDERBODY PROTECTION .

Release screws (1) and remove cover (2) (if installed).

Fig 1: Identifying Cover And Screws

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Release screws (1) on the bottom of the coolant pump.

Tightening torque: 11 51 2AZ .

Fig 2: Identifying Screws Of Coolant Pump

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Loosen hose clamps (1).

Installation note:

Note the installation position of the hose clamps.

Tightening torque: 11 51 3AZ .

Fig 3: Identifying Hose Clamps

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Release coolant hoses (1) and (2).

Unlock plug (4) and remove.

Release screw (3).

Tightening torque: 11 51 2AZ .

Remove coolant pump (5).

Fig 4: Identifying Coolant Pump, Coolant Hoses And Plug

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Follow assembly instructions:

Installation note:

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

Fig 5: Identifying Hose Clamps

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Installation note:

Attach coolant pump with screw (1).

Connector (2) must snap audibly into place.

Fig 6: Identifying Coolant Pump Screw And Connector

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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 impeller.

Assemble engine.

BLEEDING INSTRUCTIONS must be observed without fail .

Carry out wheel alignment check.