BMW 7 Series: Water Pump With Drive
Removing And Installing/Renewing 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 collecting vessel.
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).
Necessary preliminary work
- 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.
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Fig. 438: Identifying Plug Connections
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.
Release screw (4).
Tightening torque 11 51 3AZ.
Detach pipe (3) and lay to one side.
Installation note:
Replace sealing ring
Unlock quick-release coupling on coolant hose (5).
Detach coolant hose (5) and lay to one side.
Unfasten screws (2).
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Fig. 439: Identifying Pipe, Screws And Coolant Hose
Tightening torque 11 51 1AZ.
Remove coolant pump (1) in upward direction with a tilting motion.
Installation note:
Replace gasket
If reusing the coolant pump:
If a coolant pump is reused, it must be mechanically rotated once (breakaway torque at pump impellers).
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.
BLEEDING INSTRUCTIONS must be observed without fail.
READ NEXT:
Thermostat And Connections
REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N63)
WARNING: Risk of scalding!
Only perform this work after engine has cooled down.
Recycling
Catch and dispose of drained coolant in a suitable
Check BMW Diagnosis System For Excess Pressure And Vacuum (N63)
IMPORTANT: Excess pressure and vacuum lines are identified by the size of
the connection
fittings and color-coded red and blue and must not be mixed up with each
other.
Build up pressure with Blue c
SEE MORE:
Overview Of Heater - A/C System Components
Fig. 136: Overview Of Heater And A/C System Components
Condenser for air conditioner
Drier insert for air conditioner
Independent heater and attachment parts
Water valve
Heater - A/C system and attachment parts
Fan and attachment parts
Compressor
REMOVING AND INSTALLING OR REPLACING LEFT F
Notes On Handling Wiring Harnesses And Cables
The following applies in general
To avoid damage, observe the following instructions:
Avoid compressive and tensile loads
To ensure professional repairs, perform repair work only with
BMW-approved or recommended special
tools and spare parts
Make sure cables are laid without kinks or abrasion
