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Old 06-24-2010, 10:49 PM   #1
nate9
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noisy fan

Hi everyone

I have a small problem. it seems like when the fan is on level 1 or 2 there is an annoying squeaking noise. I think either there are junks stuck inside or the fan need some luburcation. anyone has any idea how i can get access to the fan or the tube where junks might need stuck in there.

I am very new to this model of car therefore I am just learning.

Thanks\

Nathan
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Old 06-24-2010, 11:12 PM   #2
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I'm assuming you're talking about the aux fan. the sqealing is probably dirt. The bearings would be in the electric motor and are sealed so you wouldn't be lubing anything up.

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Old 06-25-2010, 01:08 AM   #3
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I think he's talking about the heater blower motor. Normally non-serviceable, but some people have had luck coating it in WD-40 at the bushings. IMO, if you go through the work of getting at it, just get a known good one from the junker and change it.

Mine squeaks on 1 or 2 occasionally too.
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Old 06-25-2010, 04:11 AM   #4
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Sounds like the bushings are gone on the blower motor. The bearings are sealed, WD40 will do nothing but attract more dirt and potentially make the problem worse. Your best bet is to bite the bullet and replace it, as everlast said.
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Old 06-25-2010, 09:19 AM   #5
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Sounds like the bushings are gone on the blower motor. The bearings are sealed, WD40 will do nothing but attract more dirt and potentially make the problem worse. Your best bet is to bite the bullet and replace it, as everlast said.
I can't say that's entirely true. I had a brand new blower motor put in from the dealership and it start squealing not to long after on speed 1 or 2 but went away on 3-4. now unless the fan was faulty? I lubed mine and it did the trick. works sometimes, and sometimes it doesn't. :-)
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Old 06-25-2010, 10:45 AM   #6
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Yeah, I don't see why or how, but lubrication does quiet them sometimes. It must creep into the sealed area. I'd still replace if it was bad enough.

On a side note, the clips that hold the blower motor in defy the laws of physics. Once removed, they can never be used again. Anyone learned the secret?
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Old 06-25-2010, 11:07 AM   #7
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Yeah, I don't see why or how, but lubrication does quiet them sometimes. It must creep into the sealed area. I'd still replace if it was bad enough.

On a side note, the clips that hold the blower motor in defy the laws of physics. Once removed, they can never be used again. Anyone learned the secret?
yeah I often thought about that one...I just use zip ties to fasten it back on.
I don't know why bmw designed it that way..
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 06-25-2010, 11:23 AM   #8
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I actually think its a similar machine to the one that does the clamp on hose fittings. A machine crushes the 'loop' of the ring to tighten the clamp, which looks to be the same process required for the ones on the blower motor. Probably efficient at the factory. Also probably a special BMW tool for it. :p
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Old 06-25-2010, 11:29 AM   #9
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I actually think its a similar machine to the one that does the clamp on hose fittings. A machine crushes the 'loop' of the ring to tighten the clamp, which looks to be the same process required for the ones on the blower motor. Probably efficient at the factory. Also probably a special BMW tool for it. :p
yours has the loop crushed fitting? I only recall the plastic tab type strap they used. So I guess they had two different systems at some point.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 06-25-2010, 11:37 AM   #10
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Maybe a drop or two of machine oil (solvent free) on the bearings can help. Same should be done with almost every moving part when you replace it, they seem to dry up during storage. But I've always found that spraying WD40 on electric motors causes nothing but trouble, especially on the bushings.
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Old 06-25-2010, 12:42 PM   #11
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I tend to use Krown for everything, since I have it handy anyway.
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Old 06-25-2010, 12:58 PM   #12
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I tend to use Krown for everything, since I have it handy anyway.
ditto! Krown is way better.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 06-25-2010, 11:21 PM   #13
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I had this same problem, i tried lubing it, i did it twice with different oils, came back about two weeks after, both times, so i bought a new motor and fan assembly, and then hurt my hand installing it as it is a tight fit.
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Old 06-27-2010, 03:14 PM   #14
nate9
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Just wondering if anyone knows about a DIY write up for change the the blower motor? It would be great if there are pictures with it.

Thanks for the help guys and gals
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Old 06-27-2010, 03:36 PM   #15
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Just wondering if anyone knows about a DIY write up for change the the blower motor? It would be great if there are pictures with it.

Thanks for the help guys and gals
Not aware of any; but it's really not that hard to do. sure you gotta fight with it a bit to get the motor out. once you pull the wireharness free from the firewall its pretty straight forward. Now what I would really like is a DIY for the wiperlinkage and motor. now that is a bitch!
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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