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General E46 Forum
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Old 06-29-2016, 08:24 PM   #1
325ie4601
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Possible VANOS noise?

Recently I've noticed I slight grinding noise coming from my engine. I've had my BMW long enough to know this noise isn't normal and it hasn't always been there.. You might not be able to hear it but if you listen closely you can somewhat hear the grinding noise.. It almost sounds like a pulley but, I took the belts off and all the pulleys are fine.. I've already replaced the idler pulley as well as both tensioners.. Any idea what it could be?
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Old 06-29-2016, 09:47 PM   #2
BKMrSteel
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Sounds like lifters, and normal.
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Old 06-29-2016, 10:28 PM   #3
325ie4601
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Originally Posted by BKMrSteel View Post
Sounds like lifters, and normal.


I'm not talking about the ticking, I know that's normal. The best way I can describe the sound I'm hearing is what metal on metal sounds like


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Old 06-29-2016, 11:02 PM   #4
Sicily1918
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Quote:
Originally Posted by 325ie4601 View Post
I'm not talking about the ticking, I know that's normal. The best way I can describe the sound I'm hearing is what metal on metal sounds like
My car's doing the same thing -- it could be any of the following:
  1. Clutch fan (auto tranny).
  2. Pulley(s):
    • Water pump.
    • Power steering.
    • A/C.
    • Alternator.
In my case, it's not my water pump, as my mechanic replaced it when he heard that sound and it's still there.

I asked my mechanic if it was the seals and he said they make a different sound (VANOS rattle)... looks like he's right, as here it is:
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Old 06-30-2016, 03:06 AM   #5
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Quote:
Originally Posted by 325ie4601 View Post
Recently I've noticed I slight grinding noise coming from my engine. I've had my BMW long enough to know this noise isn't normal and it hasn't always been there.. You might not be able to hear it but if you listen closely you can somewhat hear the grinding noise.. It almost sounds like a pulley but, I took the belts off and all the pulleys are fine.. I've already replaced the idler pulley as well as both tensioners.. Any idea what it could be?
My vote is the fan clutch making that noise.
Here was my post with noise recording.

http://forum.e46fanatics.com/showthr...798&highlight=

Last edited by dslboomer; 06-30-2016 at 03:06 AM.
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Old 06-30-2016, 05:16 AM   #6
325ie4601
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Originally Posted by dslboomer View Post
My vote is the fan clutch making that noise.
Here was my post with noise recording.

http://forum.e46fanatics.com/showthr...798&highlight=


I did the electric fan conversion. Thanks any how!


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Old 06-30-2016, 06:49 AM   #7
BKMrSteel
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Its hard to tell in the video, unless its the bearings in the vanos, I don't think its your vanos. If you take the belts off, you should be able to feel if any bearings are bad in any in your serpentine assembly. You can also use a very long screw drivers as a stethoscope, just be careful!

The second video posted sounds like a bearing screaming.
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