11 51 000 Removing and installing/replacing coolant pump (N63)

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.

IMPORTANT: If a coolant pump which has already been operated is reused, it must be filled immediately after being removed with coolant (mixture ratio 1:1/water: coolant).

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:

Drain COOLANT .
Remove intercooler EXPANSION TANK .
Remove alternator DRIVE BELT .

IMPORTANT: Risk of damage.
Coolant emerges when the coolant hoses are detached from the coolant thermostat and coolant pump.
Cover surrounding components and plug connections with suitable apparatus

NOTE: For purposes of clarity, the graphic shows the auxiliary water pump removed.

Remove plug connections (2 and 3).

Installation note:

Plug connections (2 and 3) must snap audibly into place.

Unlock snap fastener on coolant hose (1).

Detach coolant hose (1) and lay to one side.

Fig 1: Identifying Plug Connections And Coolant Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (4).

Tightening torque 11 51 3AZ .

Detach pipe (3) and lay to one side.

Installation note:

Replace sealing ring .

Unlock snap fastener on coolant hose (5).

Detach coolant hose (5) and lay to one side.

Unfasten screws (2).

Tightening torque 11 51 1AZ .

Remove coolant pump (1) in upward direction with a tilting motion.

Installation note:

Replace gasket .

Fig 2: Identifying Coolant Hose, Snap Fastener, Screws, And Coolant Pump

Courtesy of BMW OF NORTH AMERICA, INC.

If reusing the coolant pump:

If a coolant pump is reused, it must be mechanically rotated once (breakaway torque at pump gears).

One coolant pump rotation will be sufficient.

If replacing the coolant pump:

Release screws on coolant thermostat.

Tightening torque 11 53 1AZ .

Remove coolant thermostat.

Installation note:

Replace sealing ring .

Assemble engine.

Top up COOLANT .

VENTING INSTRUCTIONS must be observed without fail.