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General E46 Forum
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Old 02-20-2012, 04:34 PM   #1
eerener
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both AC and Heater makes engine sound

They make sound when I turn on the AC or heather. The sound is like the engine sound. It's like there is a second mini engine in the hood and following the main engine sound. I hope I described it well. BTW, heather heats and AC cools well.
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Old 11-08-2012, 07:24 PM   #2
eerener
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like this sound




Noise coming from the AC system while compressor is ON. It ends ~1 sec after pressing the AC OFF button. It increases in intensity along with the engine RPMs.

Last edited by eerener; 11-08-2012 at 07:26 PM.
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Old 11-09-2012, 04:16 PM   #3
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No idea? anyone?

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Old 11-09-2012, 04:19 PM   #4
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Compressor on the way out maybe?
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Old 11-09-2012, 04:22 PM   #5
eerener
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it is a $1000 part, I don't know if it is worth to replace
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Old 11-09-2012, 04:26 PM   #6
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Read the description of the YT video. It posts a TIS link about this:

http://tis.spaghetticoder.org/s/view.pl?1/08/53/13
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Old 11-09-2012, 04:41 PM   #7
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Good find, im sure thats a fraction of the price of a compressor
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Old 11-09-2012, 04:43 PM   #8
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Here is a remanufactured compressor. Not as expensive as i thought. http://item.mobileweb.ebay.com/viewi...142&cmd=VIDESC
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Old 11-09-2012, 04:45 PM   #9
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If I read the opening post correctly, this noise also happens when the heater is on and the AC off. That doesn't jive with a compressor problem.
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Engineers do it with a torque wrench

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Old 11-09-2012, 04:47 PM   #10
eerener
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Quote:
Originally Posted by lcoleman View Post
Read the description of the YT video. It posts a TIS link about this:

http://tis.spaghetticoder.org/s/view.pl?1/08/53/13
According the TIS it is the "intake pipe from the evaporator to the air-conditioner compressor"

How can it causes this noise? Is it clogged?
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Old 11-09-2012, 04:53 PM   #11
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Straight from that TIS:
Cause: The vibrations of the engine are transmitted into the vehicle interior through the intake pipe of the air-conditioning compressor.

Honestly, if it happens with A/C on, I would tend to suspect the compressor as well. not sure about the heater, unless you're doing something with an automatic setting where the heat turns on the compressor as well.

I turned up this thread searching that part #, too:

http://www.e46fanatics.com/forum/sho...d.php?t=513153

Good luck.
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Old 11-09-2012, 05:01 PM   #12
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Thanks a lot everybody.
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Old 11-09-2012, 08:40 PM   #13
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No problem, post back and let us know! Do not buy an oem compressor you will get butt raped! Fcp euro ftw
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