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Posted: 10/12/11
01:22 PM
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my beamer is fine while driving temp gauge stays right at half. but if i stop and have to let it idle for mre than 10 mins. or so the gauge will raise all the way to max. at least very close to it. ive always shut car off before it got that high. what is the problem here? also from a cold start in morning it doesnt even take 2 min. for temp gauge to get up to 1/4 of the way.
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Posted: 10/12/11
05:18 PM
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warning.. operating the BMW engine in an overheating condition.. will put your wallet on a serious diet...
there are a lot of things it can be..
i am taking that you car as both a belt drive water pump mounted cooling fan and fan clutch....
the fan clutch could be bad....
there is also more than likely an electric cooling fan that looks like this..
the more i read .. the more i am thinking fan clutch failure..
seems there are also 2 different fan clutches possible..
one with 3 bolts holding the fan blade in place..
one with 4 bolts holding the fan blade in place..
Application: With 3 fan blade mounting bolts
Notes: Standard duty thermal. Thread on type. Loosen fan clutch clockwise for removal. Requires 32mm wrench (or adjustable crescent wrench).
32 MM is 1.259" ,, 1.312 is one inch and 5/16..most fan clutch wrench sets come with these sizes..
36, 40, 48, 54, 57, 68, 72, 76 and 83 mm.
there are 32Mm Bmw Fan Clutch Wrenches available.. i don't know if you can get an adjustable wrench down in the narrow area thats there usually...
sometimes you have to hold the water pump also.. usually with one of the big opening wrenches over the water pump pulley studs..
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Posted: 10/12/11
05:19 PM
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oh.. the fan clutch threads onto the threads at the top of this image on this picture of your water pump....
the fan clutch has a bimetallic spring on the front.. when the thermostat opens.. the water exchanges into the radiator.. the hot air changes the spring position.. this changes the circulation of the silicone oil inside the clutch to between the disc faces..
this causes the transfer of torque to the fan to increase it's speed and air movement..
when the coolant cools in the radiator.. the spring goes the other way and the fan clutch stops spinning as hard..
if you have overheated your motor... you really might want to think about changing your thermostat also...
the last question that i should have ask first..
have you checked the engine coolant level.. is it too the full mark???? does the system hold pressure????
when you have the engine running and you turn the AC to max cold.. does the electric cooling fan come on???
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