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E34 (1989 - 1995)

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  #1  
Old 05-22-2016, 12:10 AM
STUSSY1999 STUSSY1999 is offline
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Location: 5000
 
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Mein Auto: 1989 525i e34
My A/C high pitch noise

When I bought my car the A/C is making a high pitch noise and I know it's the A/C because when I take the fuse it doesn't make the noise Even when I'm not using the A/C and the fan is of it still makes the noise

Can anyone help me please
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  #2  
Old 05-22-2016, 05:57 AM
south26 south26 is offline
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Mein Auto: 535i 1989
Sounds like the compressor clutch might dyeing. You would either need to replace the compressor or just the clutch.


Andy
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  #3  
Old 05-22-2016, 07:05 AM
STUSSY1999 STUSSY1999 is offline
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Mein Auto: 1989 525i e34
Yeah but it still works it's just making that noise could it be the fan that needs oiling
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  #4  
Old 05-22-2016, 11:32 AM
ThoreauHD ThoreauHD is offline
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Mein Auto: 02/1994 530i 8cylinder
My A/C high pitch noise

Sounds like the blower motor if its making that noise when AC is off. Or could be AC belt slipping due to the spring loaded belt tensioner being worn out. But that sounds like a belt squeal, not a high pitched whatever.

Last edited by ThoreauHD; 05-22-2016 at 11:38 AM.
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  #5  
Old 05-22-2016, 04:11 PM
STUSSY1999 STUSSY1999 is offline
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Mein Auto: 1989 525i e34
Oh okay thank you look into it
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  #6  
Old 05-23-2016, 09:48 AM
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TheEinstein TheEinstein is online now
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Mein Auto: E34 540i
What fuse are you pulling that stops the noise?

Edit: # and name
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1995 E34 540ia
160,000 Miles
VIN# ...GF32404
Hellrot Red

Fuelly

My Basic Repair History (Edited 1/27/2015)

Ongoing comparison between two E34 540ia's

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Last edited by TheEinstein; 05-23-2016 at 09:49 AM. Reason: Edit...
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  #7  
Old 05-23-2016, 06:22 PM
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BMR_LVR BMR_LVR is offline
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Location: Asheboro, NC
 
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Mein Auto: 1992 525i
Not quite understanding the situation exactly, but be aware that it is not unknown for blower motors to burn up but not trip the fuse thereby causing a fire. Just something to chew on in case it is the blower motor itself making the noise ...
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It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 225K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
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  #8  
Old 05-24-2016, 02:32 AM
STUSSY1999 STUSSY1999 is offline
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Mein Auto: 1989 525i e34
Yeah I'm getting you I'm going to have a look this weekend thank you
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