Jet-like noise coming from under hood

s.zep · 10-29-2012, 06:00 PM

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

TrippinBimmer · 10-29-2012, 07:39 PM

CCV with 4 new hoses...

E46-Cabrio · 10-29-2012, 08:54 PM

Quote:

Originally Posted by s.zep

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...

E46_330_Ci · 10-29-2012, 10:02 PM

happen to me today ill post a video

BiMMeR07AtX · 10-29-2012, 11:22 PM

ive been getting the same exact noise on my 01 325i. have u found the culprit yet?

TrippinBimmer · 10-29-2012, 11:43 PM

what im i watching?

E46_330_Ci · 10-30-2012, 12:11 AM

Quote:

Originally Posted by TrippinBimmer

what im i watching?

Just hear the noise nothing too watch

E46_330_Ci · 10-30-2012, 12:14 AM

Quote:

Originally Posted by BiMMeR07AtX

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

TEAMAFLCON · 12-11-2012, 04:37 PM

Is this the sound you hear?

at the .21 sec mark:

10-29-2012, 06:00 PM	#1
s.zep Registered User Join Date: Oct 2012 Location: Orange County, CA Posts: 1 My Ride: 2003 325ci View My Garage	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

10-29-2012, 07:39 PM	#2
TrippinBimmer Registered User Join Date: Jan 2008 Location: Ridgeland, MS Posts: 5,342 My Ride: ZHP Custom Stage 3.5 View My Garage	CCV with 4 new hoses... __________________ ..::\|TrippinBimmer's Boost Build with Cool Parts\|::.. 4whp/3tq SAE Corrected \| Active Autowerke \| BimmerBrakes \| VMR Wheels \| ..::\| TrippinBimmer's New Project : 1988 e30 325e \|::..

10-29-2012, 10:02 PM	#4
E46_330_Ci Registered User Join Date: Oct 2011 Location: Rancho Cucamonga Posts: 43 My Ride: 330 Ci 2001 View My Garage	happen to me today ill post a video Last edited by E46_330_Ci; 10-29-2012 at 10:45 PM. Reason: adding link

10-29-2012, 11:43 PM	#6
TrippinBimmer Registered User Join Date: Jan 2008 Location: Ridgeland, MS Posts: 5,342 My Ride: ZHP Custom Stage 3.5 View My Garage	what im i watching? __________________ ..::\|TrippinBimmer's Boost Build with Cool Parts\|::.. 4whp/3tq SAE Corrected \| Active Autowerke \| BimmerBrakes \| VMR Wheels \| ..::\| TrippinBimmer's New Project : 1988 e30 325e \|::..

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10-29-2012, 11:22 PM	#5
BiMMeR07AtX Registered User Join Date: Oct 2012 Location: Austin, TX Posts: 11 My Ride: 2001 325i View My Garage	ive been getting the same exact noise on my 01 325i. have u found the culprit yet?

12-11-2012, 04:37 PM	#9
TEAMAFLCON Registered User Join Date: May 2008 Location: Los Fresnos Texas Posts: 118 My Ride: 2003 325i View My Garage	Is this the sound you hear? at the .21 sec mark: