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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 09-09-2012, 10:58 AM   #1
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Join Date: Sep 2012
Location: denmark
Posts: 8
My Ride: bmw 320i e46
Exclamation this is a weird sound, any ideas someone?

I have this bmw e46 320 m52tub20. When i rev it this noise comes

I had my mechanic to look after it, but no results. Anyone who can help me?
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Old 09-09-2012, 11:59 AM   #2
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Join Date: Dec 2009
Location: Amsterdam
Posts: 166
My Ride: E46 330CI Cabrio
That's your CCV - Crankcase Ventilation Valve (oil Separator). Start car then remove oil cap and see if you can hear the noise again.

Last edited by E46-Cabrio; 09-09-2012 at 12:02 PM.
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Old 09-09-2012, 12:34 PM   #3
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Location: Omaha, NE
Posts: 5,684
My Ride: 2001 BMW 330xi
2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
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Old 09-10-2012, 01:24 AM   #4
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Join Date: Sep 2012
Location: denmark
Posts: 8
My Ride: bmw 320i e46

Thank you very much. I will order the parts needed and get on with it. I found an exellent DIY guide here on the site. I will get back when im done.... Again thanks fellow members

Kim Denmark
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320i, idle, sound

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