How To Replace The Electric Water Pump And Thermostat On A 2006-2013 BMW 335i

Brian Eslick from How to Automotive takes you step-by step through the process of replacing the electric water pump and thermostat on a 2006-2013 BMW 335i. N54 E90.

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PROCEDURE:

1) Safely and properly raise and support the front of the vehicle. This repair task can be performed with the vehicle on jack-stands or using drive-on ramps.

2) Remove the forward under-chassis splash panel.

3) Disconnect the power steering cooler hose assembly mount on the passenger side and move the hoses rearward and toward the driver side. Use a piece of wire or a cable tie to hold the hose assembly out of the way.

4) Remove the two mounting nuts on each swaybar mount and lower the swaybar. Move the bar toward the rear of the vehicle and tie it up with a section of wire or a cable tie.

5) Remove the water pump harness plug wiring connector plug.

6) Place the coolant catch pan under the water pump. Using the flexible hose clamp driver, loosen the hose clamp on the thermostat to water pump hose (the nipple that is facing the rear of the vehicle) and carefully pull the hose off the water pump inlet nipple. This will drain most of the coolant that is in the water pump, thermostat and local hoses.

7) Use the flex driver to loosen the water pump outlet (supply) hose. The hose nipple points toward the passenger side and is above and to the rear of the thermostat (look at the new water pump to help locate the nipple and hose). We cannot remove the hose as it is solidly mounted. We will pull the water pump from the hose, in step # 13.

8) Remove the two lower water pump mounting bolts, using an E12 Torx socket.

9) Place the coolant drain pan under the forward end of the thermostat and water pump. Disconnect the radiator to thermostat hose (large plastic hose elbow at the forward end of the thermostat) by pulling out the locking wire on the quick disconnect fitting and pulling the fitting off of the thermostat nipple. Allow the coolant to drain.

10) Remove the two thermostat mounting bolts.

11) Pull the ground cable from the mounting clip that is affixed to the water pump rib, just forward of the upper water pump mounting bolt. Look at the new pump and use a light to locate the ground cable and the clip. Pull the cable out of the clip and push the clip off the rib (toward the passenger side), using a long screw driver

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Disclaimer
Owing to factors beyond the control of How to Automotive/Brian Eslick, it cannot guarantee against unauthorized modification of this information, or improper use of this information. How to Automotive/Brian Eslick assumes no liability for property damage or injury incurred as a result of any information contained in this video. How to Automotive/Brian Eslick recommends safe practice when working with power tools, automotive lifts, lifting tools, jacks and jack stands, electrical equipment, blunt instruments, chemical lubricants, or any other tools or equipment seen or implied in this video. Because of factors beyond the control of How to Automotive/Brian Eslick, no information contained in this video shall express or imply warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or information contained in this video is the sole responsibility of the user and not How to Automotive/Brain Eslick. #howtoautomotive