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#1
04-20-2009, 03:07 PM
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Fan Clutch symptoms?
I get a raspy, kind of bad bearing sound at idle. Replaced fan belts and went away for awhile. As soon as you touch gas it goes away. One BMW svc advisor said I have a bad fan clutch. He grabbed the fan blades while it was running and was able to hold it still. I don't think I would grab that sucker while it was running! Has anyone replaced one of these fan clutches? Looks simple to do about $140 for part. I heard that overheating was one symptom. However BMW temp gauges don't really move with temp, just approximation as they are heavily damped to stay at "normal" temp. Any input on this would be appreciated! 
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#2
04-20-2009, 04:55 PM
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Fan clutch problems will usually present as getting hot at idle
I would change the belt idler to start with, thats the most common place I find noise.
__________________
- 335i E92 2007 [Sapphire Black/Coral Red] - X5 E70 2013 [Sparkling Bronze/Cinnamon] "Living the dream" 1981 Delorean #6489 
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#3
04-20-2009, 08:59 PM
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Agreed, those plastic idler pulleys are well known to shatter. Real nice ones available in alloy withy replaceable bearings at Home, ask for Tom, they are fitted religeously by the 8-series boys, or just replace with new plakky ones for the cheap temporary fix.
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#4
04-20-2009, 09:52 PM
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You can easily stop the fan at idle on just about any vehicle with a fan clutch when it is not engauged.... that is the point of a fan clutch, to release when not needed to lower load on the engine. Keep in mind service advisers are not techs.
Best bet is to pull the belts off and spin each pulley by hand looking for the culprit(s) with the bearing slack.
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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