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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-29-2012, 06:00 PM   #1
s.zep
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Join Date: Oct 2012
Location: Orange County, CA
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My Ride: 2003 325ci
Exclamation Jet-like noise coming from under hood

First post, first BMW, sorry if I posted in the wrong area. (and if it drags on..)

Just purchased a 03' 325ci 2 months ago w/120,000 mi. at purchase. Everything with the car is running great and I have no check engine light on, but about a month ago when the temperature dropped at night in my area my car would make a whiney jet-like noise the next day. It would only last for about 10 seconds then go away.
But 2 weeks ago the noise has started to prolong and now goes on for about 2-4 minutes (or until my car is fully warmed up). I've done some research and the symptoms point to the Secondary Air system, but I have no clue

Car is a manual trans..

Anyone know where the secondary air pump is located so I can check it for rips or holes? I know it's only getting worse. Will post a video later tonight
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Old 10-29-2012, 07:39 PM   #2
TrippinBimmer
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CCV with 4 new hoses...
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Old 10-29-2012, 08:54 PM   #3
E46-Cabrio
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Quote:
Originally Posted by s.zep View Post
Anyone know where the secondary air pump is located so I can check it for rips or holes? I know it's only getting worse. Will post a video later tonight
There it is...
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Old 10-29-2012, 10:02 PM   #4
E46_330_Ci
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happen to me today ill post a video

Last edited by E46_330_Ci; 10-29-2012 at 10:45 PM. Reason: adding link
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Old 10-29-2012, 11:22 PM   #5
BiMMeR07AtX
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My Ride: 2001 325i
ive been getting the same exact noise on my 01 325i. have u found the culprit yet?
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Old 10-29-2012, 11:43 PM   #6
TrippinBimmer
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what im i watching?
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Old 10-30-2012, 12:11 AM   #7
E46_330_Ci
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Originally Posted by TrippinBimmer View Post
what im i watching?
Just hear the noise nothing too watch
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Old 10-30-2012, 12:14 AM   #8
E46_330_Ci
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Originally Posted by BiMMeR07AtX View Post
ive been getting the same exact noise on my 01 325i. have u found the culprit yet?
That noise is from the secondary air pump my rubber hose torn of while i was changing my vcg from yesterday will report tomorrow when i fix the problem
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Old 12-11-2012, 04:37 PM   #9
TEAMAFLCON
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Is this the sound you hear?



at the .21 sec mark:
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