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

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 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 .
Remove clean air pipe. See REMOVING LOWERING CLEAN AIR PIPE and REMOVING TOP CLEAN AIR PIPE .

Removal:

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

Fig 1: Identifying Screws On Bottom Of Coolant Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Release coolant hoses (1) and (2).

Unlock plug (4) and remove.

Release screw (3).

Remove coolant pump (5).

Fig 2: Identifying Coolant Pump, Coolant Hoses, Screw And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Follow assembly instructions:

Installation note:

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

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

Fig 3: Identifying Hose Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Position coolant pump (5).

Add screws (3).

Tighten coolant hoses (1) and (2).

Tightening torque 11 51 3AZ .

Insert connector (4).

Fig 4: Identifying Coolant Pump, Coolant Hoses, Screw And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten bolts (1) on the underside of the coolant pump.

Tightening torque 11 51 1AZ .

Fig 5: Identifying Screws On Bottom Of Coolant Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: