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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E60 / E61 (2004 - 2010)

E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 05-13-2013, 09:25 AM
Mudspike Mudspike is offline
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Location: Ca
 
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Mein Auto: 2005 525i
E60, N52 engine, howling noise with A/C on

Hi.

2006, E60 525i with N52 Engine

My car just started developing a humming or howling noise from the hood.
I first thought that oil separator or related hoses are failing based on my web search.
But later I came across that this problem is A/C related because,
when the A/C is off, the noise is gone… and this symptom is intermittent FOR NOW

I am getting very concerned as A/C job might be vary pricy.
Can anyone shed a light on the part with potential problem so that I can be ready for the meeting with the stealer?

Thanks
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  #2  
Old 05-13-2013, 09:33 AM
schpenxel schpenxel is offline
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http://www.bimmerfest.com/forums/sho...877&highlight=

I changed mine in the driveway in an afternoon (and didn't start until lunch, and mine was on a V8 model, which I assume is more difficult).

I replaced with a low mileage used unit. It has worked fine. The new ones are like $600+ just for the compressor.

The replacement I installed still has a LITTLE bit of howl to it. The old one had a horrible "rattle" that sounded like something was about to come apart. I have seen it called the "death rattle" on other forums and that you need to replace it once it starts doing that. If you don't, when it finally does go, you end up with pieces of compressor throughout the AC system and it is next to impossible to clean it out.

Last edited by schpenxel; 05-13-2013 at 09:36 AM.
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  #3  
Old 05-15-2013, 03:59 PM
Mudspike Mudspike is offline
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Mein Auto: 2005 525i
Thanks for the input.
I left the car today to the A/C specialist to see what the real problem is or to see if he can repair compressor instead of replacing it.
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  #4  
Old 05-15-2013, 04:02 PM
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Kamdog Kamdog is online now
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Mein Auto: 2008 535i
Hopefully, it is only belts.
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535i, Monaco, Cream, Light Poplar, Comfort Seats, PP, Nav, ED.
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  #5  
Old 05-15-2013, 05:28 PM
Mudspike Mudspike is offline
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I suspect not.
Air from A/C is not same as usual recently :o(
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  #6  
Old 05-17-2013, 05:41 AM
schpenxel schpenxel is offline
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What's the verdict?
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  #7  
Old 05-18-2013, 09:00 AM
Mudspike Mudspike is offline
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Quote:
Originally Posted by schpenxel View Post
What's the verdict?
I got a call yesterday and told that it SEEMED to be compressor.
It SEEMED to be correct but I was not still certain whether it was due to compressor or because of leaks at somewhere else.
I told them not to touch it in that case.
I will have to get it re-checked with A/C specialist.

If it turned out to be a compressor issue, I will buy and supply the compressor and relevant seals to them
Prices of compressor range from 420~500 for the same Denso model … so I might grab the cheapest one.

I recall that I saw article that the drier should be changed with compressor.
It this absolutely necessary? Or did I misunderstood for part#2?
Part#1 is selling at $600 by someone while the other is selling at $120.. too good to be true..

Besides the mourning noise from the hood, I heard a hissing noise from passengers side, underneath of dashboard a night before A/C got less cold.
If that noise was related with A/C system, which part do I have to ask mechanic to take a close look at from the pic’?

Thanks in advance
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  #8  
Old 05-18-2013, 09:21 AM
schpenxel schpenxel is offline
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Location: Greensboro, NC
 
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Mein Auto: 2004 545i
Quote:
Originally Posted by Mudspike View Post
I got a call yesterday and told that it SEEMED to be compressor.
It SEEMED to be correct but I was not still certain whether it was due to compressor or because of leaks at somewhere else.
I told them not to touch it in that case.
I will have to get it re-checked with A/C specialist.

If it turned out to be a compressor issue, I will buy and supply the compressor and relevant seals to them
Prices of compressor range from 420~500 for the same Denso model …. so I might grab the cheapest one.

I recall that I saw article that the drier should be changed with compressor.
It this absolutely necessary? Or did I misunderstood for part#2?
Part#1 is selling at $600 by someone while the other is selling at $120.. too good to be true..

Besides the mourning noise from the hood, I heard a hissing noise from passengers side, underneath of dashboard a night before A/C got less cold.
If that noise was related with A/C system, which part do I have to ask mechanic to take a close look at from the pic'?

Thanks in advance
First, the only thing that would need to be replaced is item #2 (desiccant is BMW's term for it--seems to be common on German vehicles). #1 is the condenser core. No need to mess with that.

The desiccant can go either way. I did not replace mine.

The BMW documentation I found (ISTA/D) said to replace the desiccant if the system is left open for more than 24 hours. Mine was only open a few hours, so I left it alone.

However, I did purchase an aftermarket one on eBay for much less than the "BMW" one, and had intended to replace it, but at the end of the day I was tired and decided to go with the old one and see what happened. All has worked fine ever since.

Your howling sound sounds the same as what mine was doing, however, my new one still does that, just to a much lesser extent. I guess my point is, are you sure it has gotten louder? The biggest reason I changed mine is because it was beginning to rattle, especially when I turned the system off. I thought something was wrong with the transmission at first it was so loud.. then finally used a stethescope to trace it back to the compressor. It should be easy for a shop with one of these (hell, I used a long 3/8" extension and it worked fine) to figure out where the noise is coming from. Just push the end of the extension on to a piece of metal and put your ear to the other end. You will be able to hear the vibrations that part is experiencing. It will be obvious when you find the problem. You can hear bearings turning, etc. It's pretty cool and easy



Last edited by schpenxel; 05-18-2013 at 09:24 AM.
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  #9  
Old 06-19-2016, 11:43 AM
ey2001 ey2001 is offline
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Location: LA
 
Join Date: Jul 2008
Posts: 11
Mein Auto: 525
Quote:
Originally Posted by Mudspike View Post
I got a call yesterday and told that it SEEMED to be compressor.
It SEEMED to be correct but I was not still certain whether it was due to compressor or because of leaks at somewhere else.
I told them not to touch it in that case.
I will have to get it re-checked with A/C specialist.

If it turned out to be a compressor issue, I will buy and supply the compressor and relevant seals to them
Prices of compressor range from 420~500 for the same Denso model … so I might grab the cheapest one.

I recall that I saw article that the drier should be changed with compressor.
It this absolutely necessary? Or did I misunderstood for part#2?
Part#1 is selling at $600 by someone while the other is selling at $120.. too good to be true..

Besides the mourning noise from the hood, I heard a hissing noise from passengers side, underneath of dashboard a night before A/C got less cold.
If that noise was related with A/C system, which part do I have to ask mechanic to take a close look at from the pic’?

Thanks in advance

Did you end up changing the ac compressor??
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  #10  
Old 06-24-2016, 11:46 AM
Mudspike Mudspike is offline
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Location: Ca
 
Join Date: Nov 2012
Posts: 46
Mein Auto: 2005 525i
Quote:
Originally Posted by ey2001 View Post
Did you end up changing the ac compressor??
Yes I did and that took care of issue..
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