Question about 2006 BMW 750Li

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2006 bmw 750li, radiator cooling fan not running when engine hot, I have replaced the sensor or switch, in the lower radiator hose with new, fan will not come on still. is there a fuse that might be preventing it from running, if so where is it?

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  • BMW Master
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The cooling fan fuse is located in the main fuse panel,location of which should be in your owners manual if you have one if not call the dealer and ask.it could be the cooling fan motor itself not working or the cooling fan relay.to check the cooling fan if you disconnect the plug on the back of the motor and feed direct power and ground to the terminals of the motor.if the fan starts to work then it is okay.to change the cooling fan it is a job for a shop to do as it entails alot parts removal to get to the fan itself

Posted on Mar 30, 2011

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  2. On Canadian models, disconnect the relay block that controls the day time running lights.
  3. Detach the upper radiator hose.
  4. Remove the lower radiator hose from the water outlet pipe.
  5. On vehicles with an automatic transmission, remove the transmission oil cooler hoses from the cooler pipe.
  6. Detach the cooling fan connectors.
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  8. To remove the radiator cooling fans, detach the 2 bolts and 2 upper supports.
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  10. Remove the lower supports.
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  12. Remove the lower radiator hoses from the radiator if they are still attached.
  13. Remove the No.1 ECT switch.
  14. Detach the cooling fans from the radiator.
Remember, SAFETY FIRST...never open, service, or drain radiator when hot. Serious burns or injury can occur. Always drain coolant into a sealable container. Cats and dogs are attracted to coolant and can be fatal to them if consumed. Coolant should be re-used unless it's contaminated or several years old.
Sure hope this helps you and good luck.

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RADIATOR REPLACEMENT


  • At the time of installation, please refer to the following items.
  • Start the engine, and check for coolant and A/T fluid leaks.
  • Check the A/T fluid level.
  1. Drain engine coolant.
  2. Canada: Disconnect relay block (for daytime running light system) from battery hold-down clamp.
  3. Disconnect upper radiator hose from radiator.
  4. Disconnect lower radiator hose from water inlet pipe.
  5. Disconnect A/T oil cooler hoses from oil cooler pipes.
  6. Disconnect No.1 and No.2 cooling fan connectors.
  7. Disconnect No.1 Engine Coolant Temperature (ECT) switch wire connector.

  8. Remove radiator and cooling fans assembly.
    1. Remove the 2 bolts and 2 upper supports. Torque: 12.8 Nm (9 ft. lbs.)
    2. Lift out the radiator, and remove the radiator and cooling fans assembly.
    3. Remove the 2 lower supports.
  1. Remove A/T Oil cooler hoses from radiator.
  2. Remove lower radiator hose from radiator.
  3. Remove No.1 ECT switch.

  4. Remove No.1 cooling fan from radiator. Remove the 2 bolts and cooling fan. Torque: 5.0 Nm (44 inch lbs.)
  5. Remove No.2 cooling fan from radiator. Remove the 3 bolts and cooling fan. Torque: 5.0 Nm (44 inch lbs.)
INSTALLATION
Installation is in the reverse order of removal.

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