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Home >> BMW >> 2014 >> M5 Automatic DCT Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine - Variable Valve Timing Control System (VANOS), Intake Plenum, Turbocharger, Water Pump, Thermostat, Coolant Lines, EGR Valve, EGR Cooler, Oxygen Sensors - Repair >> Water Pump >> N55 Hybrid Engine >> 11 51 000 Removing and installing/replacing coolant pump (N55 Hybrid)

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

WARNING:

High-voltage hazard!

The following must be strictly observed prior to starting work  :

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: 

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

Necessary preliminary tasks: 

IMPORTANT: To avoid the need for axle/wheel alignment, mark position of steering box (1) to front axle support (2).
To do so, draw a wide white stripe on the front bolting points (left and right) and apply a thin black marking (3) to this stripe.
Fig 1: Marking Position Of Steering Box To Front Axle Support
G08470376Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and tie anti-roll bar (2) to front axle support.

Tightening torque 31 35 1AZ .

Fig 2: Identifying Anti-Roll Bar And Screws
G06889610Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Release coolant hose (2).

Installation note: 

Note installation position of hose clamps.

Tightening torque 11 53 9AZ .

Fig 3: Identifying Plug Connection And Coolant Hose
G09846160Courtesy of BMW OF NORTH AMERICA, INC.

Release coolant hose (1).

Installation note: 

Note installation position of hose clamps.

Tightening torque 11 53 5AZ .

Fig 4: Identifying Coolant Hose
G09846161Courtesy of BMW OF NORTH AMERICA, INC.

Follow assembly instructions: 

Installation note: 

Hose clamps (1) must be installed in the center of the marked area (see Fig 5).

Fig 5: Identifying Hose Clamp
G09846162Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 11 51 2AZ .

Installation note: 

Replace aluminum screws  .

Fig 6: Identifying Screws
G09846163Courtesy of BMW OF NORTH AMERICA, INC.

Unclip cable (1) from bracket.

Release screw (2).

Tightening torque 11 51 2AZ .

Fig 7: Identifying Cable, Bracket, and Screw
G09846164Courtesy of BMW OF NORTH AMERICA, INC.

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.

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