E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

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!

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 9 votes, 5.00 average. Display Modes
Old 10-27-2009, 11:17 PM   #1
eweis
Registered User
 
Join Date: Dec 1969
Location: Hilliard, Ohio
Posts: 147
My Ride: 1999 328i
Secondary air pump noise

Anyone else have the secondary air pump making a screeching noise? Here's the part number: 11 72 1 435 364. It's the canister type thing on the passenger side of the engine compartment.

It makes the noise for a minute or so at start up then stops.

Anyone know if there's anything complicated about replacing it. Just unbolt or do you have to pull a vacuum on any lines or anything like that??
eweis is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-28-2009, 01:37 AM   #2
ThatGuy_JZ
Registered User
 
Join Date: Jul 2008
Location: CLT, NC
Posts: 995
My Ride: '02 Steel Blue 325Ci
Send a message via AIM to ThatGuy_JZ
Is it screeching loud, like really loud, sounds like something broken? Some do produce a slight whine, which is fairly normal, kinda like a jet engine sound from inside the cab. Pretty sure this is just the pump working to push air. Check the hose that runs from it to the check valve for cracks or damage. Also if you have an early e46, prior to 03/04 w/ an m54 motor, take the top cover off it, it unclips. Check the little foam filter in their to make sure it's in tact. It's simple to replace. I have a used pump for sale with about 50k miles on it if you're interested.
__________________
- 2002 Steel Blue 325Ci -

ThatGuy_JZ is offline   Reply With Quote
Old 10-28-2009, 09:19 PM   #3
eweis
Registered User
 
Join Date: Dec 1969
Location: Hilliard, Ohio
Posts: 147
My Ride: 1999 328i
No, it's not screeching very loudly. Just a noticeable whining.

I've got a '99 328i with the m52 engine but the same type of component. I opened it up and the filter is disintegrating but the hose to the valve is what is in worse shape so I'll replace those and maybe that will resolve the whining problem.

But, I hate to order that simple hose (11727555680) online for $15 especially since that doesn't include shipping.

Can I just get general use automotive hose from my local auto parts dealer?
eweis is offline   Reply With Quote
Old 10-29-2009, 09:57 PM   #4
ThatGuy_JZ
Registered User
 
Join Date: Jul 2008
Location: CLT, NC
Posts: 995
My Ride: '02 Steel Blue 325Ci
Send a message via AIM to ThatGuy_JZ
No, I work at a auto parts store, we don't have anything with the pre-molded bends that you need. Call a local dealership and get a price, it really can't be that expensive from them. And you'll save on shipping. You should definitely replace that hose those, it's very common for them to disintegrate with age, if you don't eventually you'll get a check engine light.
__________________
- 2002 Steel Blue 325Ci -

ThatGuy_JZ is offline   Reply With Quote
Old 11-12-2009, 03:41 AM   #5
thefrog1394
Registered User
 
Join Date: Jul 2009
Location: Columbus, Ohio
Posts: 1,007
My Ride: e46- 1999 323i
Quote:
Originally Posted by ThatGuy_JZ View Post
No, I work at a auto parts store, we don't have anything with the pre-molded bends that you need. Call a local dealership and get a price, it really can't be that expensive from them. And you'll save on shipping. You should definitely replace that hose those, it's very common for them to disintegrate with age, if you don't eventually you'll get a check engine light.
Yup, mine disintegrated. Wtf does this secondary air pump thing do? I think I remember reading it was some emissions-related deal, but what exactly is it pumping and to where and why? And whats the primary airpump?
__________________

Photo in Cleveland, Ohio
1999 323i - 210,000 miles and counting.
Rear Wheel Bearing Tool (SitTools B90) Rental, ~$60
thefrog1394 is offline   Reply With Quote
Old 11-12-2009, 03:43 AM   #6
ProchaineStation
Registered User
 
Join Date: Oct 2008
Location: Montreal, Canada
Posts: 4,208
My Ride: Metro, Bus, Bike
Send a message via MSN to ProchaineStation
^ werd.
__________________
Next Stop: ProchaineStation™

Montreal, world transit & infrastructure enthusiast.
www.youtube.com/AntoDamicoShow
ProchaineStation is offline   Reply With Quote
Old 11-16-2009, 02:46 PM   #7
agb1976
Registered User
 
Join Date: Sep 2009
Location: Chino, Ca
Posts: 43
My Ride: 325i
It helps pump more air into the engine to help with cold starts I think. The hose from the pump to switch was 41 BUCKS AT the dealership by me. Got it online for 26.00 shipped and have to wait a day.
agb1976 is offline   Reply With Quote
Old 11-16-2009, 06:16 PM   #8
eweis
Registered User
 
Join Date: Dec 1969
Location: Hilliard, Ohio
Posts: 147
My Ride: 1999 328i
As I may have mentioned earlier, I have gotten Peake Table 15 codes 92 and 8. I've also got a whining, coming from the air pump for the first couple minutes of a cold start.
I noticed that my air pump smog hose was quite brittle so I ordered and just received it today. So, I'm replacing tonight and let you all know if it resolved the problems or not.
My hose was only $14.59 and since I ordered a few other items, shipping was free. Got it from AutohausAZ.
eweis is offline   Reply With Quote
Old 11-16-2009, 08:18 PM   #9
ThatGuy_JZ
Registered User
 
Join Date: Jul 2008
Location: CLT, NC
Posts: 995
My Ride: '02 Steel Blue 325Ci
Send a message via AIM to ThatGuy_JZ
Quote:
Originally Posted by thefrog1394 View Post
Yup, mine disintegrated. Wtf does this secondary air pump thing do? I think I remember reading it was some emissions-related deal, but what exactly is it pumping and to where and why? And whats the primary airpump?
The check valve is vacuum operated to open at cold starts, with the check valve open, the air pump feeds air through ports in the head and into the exhaust manifolds. This fresh air helps to warm up the cats faster and improve their ability to filter emissions on cold starts.

AGB, Damn! $40 for a short pre-molded hose is a damn ripoff, I can't believe that.
__________________
- 2002 Steel Blue 325Ci -

ThatGuy_JZ is offline   Reply With Quote
Old 11-18-2009, 03:27 AM   #10
fdm68
Registered User
 
Join Date: Sep 2009
Location: Germany
Posts: 84
My Ride: 2003 325i
^
^
^

spot on, had to replace mine last year at about 50K.
fdm68 is offline   Reply With Quote
Old 11-19-2009, 11:51 AM   #11
agb1976
Registered User
 
Join Date: Sep 2009
Location: Chino, Ca
Posts: 43
My Ride: 325i
AGB, Damn! $40 for a short pre-molded hose is a damn ripoff, I can't believe that

The dealer wanted 40 plus tax. That's why I got it online. Was 17 bucks plus 6 bucks shipping plus good old California sales tax. I would have gotten it from Autohaus AZ but it would have taken a day longer to get it. So I bit the bullet and got the one close by.
agb1976 is offline   Reply With Quote
Old 11-24-2009, 07:48 AM   #12
tegboi
Registered User
 
Join Date: Sep 2008
Location: Emeryville
Posts: 735
My Ride: 323i.GROM.rhdDA9.cub
so, where's this website you guys get it for $24 shipped from?


im having a CEL for primary & secondary air pump, along with the intake cam sensor.


sensor should be here on wed

and have been wondering about the air pump.



the first year or so i had this E46, i never heard it much..

('99 323i)

after some time, i heard the whinning of the air pump much louder than before..


i'll remove the engine cover to see if i can find this hose from the air pump & filter tomorrow..
__________________
teamULTRASPEED
tegboi is offline   Reply With Quote
Old 11-24-2009, 06:42 PM   #13
eweis
Registered User
 
Join Date: Dec 1969
Location: Hilliard, Ohio
Posts: 147
My Ride: 1999 328i
Just wanted to report back here to say that I got the new hose, installed it and the screeching from the air pump has stopped. The nozzle from the aluminum air pump check valve was covered with crusty, grey, sooty junk which I had to scrape off before attaching the new hose. No noise and no more code (I believe it was P1478) so all good.

Note to previous poster: you don't have to remove anything to see this hose (at least the one I'm referring to p/n 11727555680). The one I replaced is the air pump smog hose and it's plainly visible between the air pump (11721435364) and the smog pump check valve/emission system control valve (11727553063).

The place I got the part from is AutoHausAZ.com. $14.59 + shipping. They have a $50 threshold for free shipping and I ended up buying some other stuff so $0 shipping.

Last edited by eweis; 11-24-2009 at 11:00 PM. Reason: Additional info, part#s
eweis is offline   Reply With Quote
Old 12-28-2009, 08:00 PM   #14
BMWDMD
Registered User
 
Join Date: Jul 2009
Location: Chicago/St. Louis
Posts: 26
My Ride: 2002 325CI
The Northfield BMW dealer in Illinois just quoted me $55.00 for that hose!?!?!? Gonna buy it online
BMWDMD is offline   Reply With Quote
Old 12-31-2009, 01:16 PM   #15
BigMikeE46
Registered User
 
Join Date: Dec 2009
Location: Greensboro, NC
Posts: 209
My Ride: 02 325i, 03 SC COBRA
Send a message via AIM to BigMikeE46
I hate to wake this one up... but my passenger side makes wierd noises but not only at start up but constantly, as long as i have the scroll thing turned to cold. Theres a whistle kind of too it. During the real real hot days, the right side refuses to blow out any cold A/C while the left side does. But when it gets cooler outside the passenger side begins to partially send out cold air. I'll make a vid of this ASAP. I'm new to this site, arent I suppose to get an email informing me that someone commented on the thread? thanks
BigMikeE46 is offline   Reply With Quote
Old 12-20-2010, 08:33 PM   #16
2003 325i
Registered User
 
Join Date: Mar 2009
Location: New Hamburg, Ontario, Canada
Posts: 1,637
My Ride: '03 Orient Blue 325i
Reviving an old thread here... how do you unclip the top of the secondary air pump to check the foam filter inside... I found 3 clips on the side but was afraid of breaking tabs off... any tips?
2003 325i is offline   Reply With Quote
Old 12-20-2010, 09:28 PM   #17
ThatGuy_JZ
Registered User
 
Join Date: Jul 2008
Location: CLT, NC
Posts: 995
My Ride: '02 Steel Blue 325Ci
Send a message via AIM to ThatGuy_JZ
just those clips, that's it. you can see each of them on top.
__________________
- 2002 Steel Blue 325Ci -

ThatGuy_JZ is offline   Reply With Quote
Old 04-13-2014, 05:09 PM   #18
Polanco00'328ci
Registered User
 
Join Date: Mar 2014
Location: Glendale, California
Posts: 9
My Ride: 2000 328ci
hey guys my 2000 328ci M52TU is making this god awful noise like rattle and i know the vanos has to be repaired but this is a different noise it sounds like a go-cart from inside the engine its on the passenger side. It really sounds like its coming from the secondary air pump. It makes the noise when i rev the car in nuetral and under load never at stand still. Idk if its the vanos projecting the sound because as we know the air pump is right next to the vanos. OR is it my tensioner pulleys? i have no idea ive been reading and reading but i cant seem to find somone having this problem or atleast describing it like a go-cart. Thanks
Polanco00'328ci is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 02:58 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use