LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2009 >> 135i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Engine - Repair (N52K)) >> Water Pump With Drive >> 11 51 000 Removing And Installing/Replacing Water Pump (N52K)

11 51 000 Removing And Installing/Replacing Water Pump (N52K)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Danger 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 water pump that has already been operated is reused, it must be filled with coolant immediately after removal.
Mixture ratio, water: coolant = 1 : 1
Protect plug connections against coolant and contamination.
Cover plug connections with suitable materials.
IMPORTANT: Aluminum-magnesium materials. No  steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum screws/bolts exclusively. Aluminum screws/bolts must be replaced each time they are released.  Aluminum screws/bolts are permitted with and without color coding (blue). For reliable identification: Aluminum screws/bolts are not magnetic  . Jointing torque and angle of rotation must be observed without fail (risk of damage)  .

Necessary preliminary tasks: 

Unfasten hose clip (1).

Tightening torque. See 11 53 5AZ in THERMOSTAT AND CONNECT .

Remove coolant hose.

Unfasten hose clip (2).

Tightening torque. See 11 53 3AZ in THERMOSTAT AND CONNECT .

Remove coolant hose.

Disconnect plug connection (3).

Release screws (4).

Tightening torque. See 11 51 1AZ in 11 51 ELECTRIC WATER PUMP WITH DRIVE .

Fig 1: Identifying Hose Clip, Plug Connection And Screws
G04755034Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Replace aluminum screws. 

Remove electric water pump (x). See 11 51 000 REMOVING AND INSTALLING/REPLACING WATER PUMP (N52K) .

Installation: 

If the electric water pump is reused, it must be rotated one turn due to the breakaway torque at the blade wheels.

Assemble engine.

Venting instructions  must be observed without fail  . See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATER LEAKS (N52/ N52K/ N51/ N53) .

scientia non olet · About LEMON Manuals