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

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. 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 .
Remove REINFORCEMENT PLATE (only E70, E71, E84).

Disconnect plug connection (1).

Release coolant hose (2).

Installation note:

Note installation hose clamps.

Tightening torque: 11 53 9AZ .

Fig 1: Identifying Coolant Hose Plug Connection

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Release coolant hose (1).

Installation note:

Note installation hose clamps.

Tightening torque: 11 53 5AZ .

Fig 2: Identifying 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 Coolant Hose Clamp

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Release screws (1).

Tightening torque: 11 51 2AZ .

Installation note:

Replace aluminum screws.

Fig 4: Identifying Coolant Pump Screws

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Unclip cable (1) from bracket.

Release screw (2).

Tightening torque: 11 51 2AZ .

Fig 5: Identifying Coolant Pump Cable And Screws

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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 .