Auto Parts Search
BMW 525XI Engine >> OVERHEATING OF ENGINES WITH ELECTRIC COOLING FANS
Overheating Of Engines With Electric Cooling Fans
Ever since gasoline prices have shot up, vehicle manufacturers have downsized cars and their engines. One of the best ways of making a car smaller is to turn the engine sideways under the hood. This has instituted the use of one or more electric cooling fans to move air through the radiator. Diagnosing overheating conditions on engines with electric cooling fans requires a few extra steps to ensure that the electrical control system for the fan is operating properly.
o Perform all of the tests associated with normal
installations, for example: check antifreeze level,
thermostat, water pump and hoses.
o Check that the cooling fan is moving air through the
radiator. With the fan turned on air should never blow out
through the front of the vehicle. If there is more than one
fan, be sure to check both. It's possible for the
electrical leads to be reversed during installation causing
the fan to move air in the opposite direction.
o If the vehicle is equipped with two fans, be sure that both
of them work. If the vehicle is equipped with air
conditioning, one of the fans may only operate when the air
conditioning is on. Consult the service manual if you are
o Fans are controlled by a temperature sending unit. Check a
suspected faulty sensor by bridging the two connections. If
the fan comes on, then the sensor is at fault.
o Verify that the fan comes on at the temperature listed in
the service manual. Replace the sensor if the proper
temperatures are not maintained.
For additional information see AERA Technical Bulletins: TB 706,
SB 158 & SB 137
The AERA Technical Committee
Looking for replacement BMW 525XI engines? Visit our online Rebuilt Engines Store. Need to fix your BMW 525XI engine? Access here the comprehensive online repair guide for your BMW 525XI engine. Click Here to find a used BMW 525XI engine.
Shop online for auto body parts, engines, wheels, lights...
|2007 BMW 525XI Bumper Washer Jet Bracket, Front, Driver Side, A high quality, OE replacement headlight washer nozzle cover; Backed by 1-year, unlimited-mileage warranty..||$7.48|
|2007 BMW 525XI Headlight Bulb, A high quality, OE replacement headlight bulb; With 1-year limited TruckEFX warranty..||$57.21|
|2008 BMW 3 Series Sedan Taillight Passenger Side Inner, Passenger Side Inner Tail Light Lens And Housing; For Sedan Models; Mounts On Deck Lid, , .||$62.50|
|2007 BMW 525XI L6, 3.0 L, 181 CID Rebuilt Engine, Warranty: 3-Year/100,000 Mile, .||Ad Hoc|
|2006 BMW 525XI Used Air Flow Meter/Sensor, 3.0, AUTO, AWD, Very Good.||$85.00|
|2006 BMW 525XI Used A/C Compressor, E60, 528I, 3.0L, RWD, SDN, Very Good.||$246.00|
Help me find
Search DIY repair manuals by VIN...
Need To Fix Your Car or Truck?
Try Our Repair Service Finder
Help me find