How Do I Find The Leak? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 01-09-2005, 11:49 PM
n00b
 
Ferrahs's Avatar
 
Join Date: Jun 2004
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ferrahs is an unknown quantity at this point
(Thread Starter)
Its a 1996 328 and I know theres a vacuum leak, the symptoms are there...The infamous hissing noise, lack of power, etc. Now my issue is where is it, none of the hoses seem bad. The hissing noise is coming from the vicinity of the manifold which worries me cause that is not an easy job. I was also thinking the throttle body because when you rev the engine slightly the hissing noise goes away, but thats usually normal with all vacuum leaks( its either that or the engine dies) but whats peculiar about this one is that you only have to slightly rev it like only to 1200 rpms nothing high for the hissing to go away...What i wanna know is, am i missing or overlooking anything. Its perpexing because ive never heard a case where it comes from the manifold area but then i could be wrong.. Has anyone had experiance with this that can be of help please.
Ferrahs is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 01-09-2005, 11:57 PM
5th Gear Member
 
Rooz's Avatar
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,562
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rooz is an unknown quantity at this point
Quote:
Originally posted by Ferrahs@Jan 10 2005, 12:49 AM
Its a 1996 328 and I know theres a vacuum leak, the symptoms are there...The infamous hissing noise, lack of power, etc. Now my issue is where is it, none of the hoses seem bad. The hissing noise is coming from the vicinity of the manifold which worries me cause that is not an easy job. I was also thinking the throttle body because when you rev the engine slightly the hissing noise goes away, but thats usually normal with all vacuum leaks( its either that or the engine dies) but whats peculiar about this one is that you only have to slightly rev it like only to 1200 rpms nothing high for the hissing to go away...What i wanna know is, am i missing or overlooking anything. Its perpexing because ive never heard a case where it comes from the manifold area but then i could be wrong.. Has anyone had experiance with this that can be of help please.
[snapback]267904[/snapback]
This mind sound stupid, but my mom had a somwhat smiliar problem on her 1997 540, and it turned out it was just a dirty (greased up for some reason) air filter.


VIEW MOD LIST & PICS
I am worth $2,010,238 on HumanForSale.com

Quote:
Originally Posted by Gregg
Umnitza now provides a mechanic to install all parts ordered right in the box! It's their new "Total customer service program" that will eliminate all the haters and keep incompetents from breaking shit and blaming the vendor! When you are all set simply call INS and they will pick him up free of charge.
Rooz is offline  
#3 (permalink) Old 01-10-2005, 12:00 AM
n00b
 
Ferrahs's Avatar
 
Join Date: Jun 2004
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ferrahs is an unknown quantity at this point
(Thread Starter)
Thanks for the suggestion but i checked that and unfortunatly its not the air filter, you can hear the leak, its just a matter of finding it.
Ferrahs is offline  
#4 (permalink) Old 01-10-2005, 02:58 AM
5th Gear Member
 
Speedy-325is's Avatar
 
Join Date: Jun 2004
Location: Pole Position #1
Posts: 1,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Speedy-325is is an unknown quantity at this point
Send a message via AIM to Speedy-325is Send a message via MSN to Speedy-325is Send a message via Yahoo to Speedy-325is
get a can of starter fluid (BEST) or even wd 40 and LIGHTLY MIST (not spray!!!) but mist the areas you suspect and the hoses while the engine is idling. when you mist the area that does have a leak, the rpm's on your car will rise for a second cuz its pulling in the spray and burning it as extra fuel. you wont need to spray alot, but this is the best way to find it if it is there.

Mark
Speedy-325is is offline  
#5 (permalink) Old 01-10-2005, 08:35 AM
1st Gear Member
 
fredo 328's Avatar
 
Join Date: Sep 2004
Location: Richmond, VA
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
fredo 328 is an unknown quantity at this point
vent pipe tight at the connection with valve cover? maybe there is a leak along this system which would be an easy fix, and be the cause of the hiss and bad idle.
Attached Thumbnails
Click image for larger version

Name:	vent_pipe.JPG
Views:	91
Size:	14.9 KB
ID:	16221  

<img src='http://home.comcast.net/~farrieta/index_files/sig2b.jpg' border='0' alt='user posted image' />
********************************
&quot;staring at the world thru my rearview&quot; 2pac
fredo 328 is offline  
#6 (permalink) Old 01-10-2005, 09:44 AM
You Can Has A Custom Title!!
 
thekid's Avatar
 
Join Date: Jan 2004
Location: Jackson MS
Posts: 3,445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute thekid has a reputation beyond repute
but you do not have a bad/rough idle correct?
thekid is offline  
#7 (permalink) Old 03-29-2005, 01:21 PM
3rd Gear Member
 
kyle_baker's Avatar
 
Join Date: Jun 2004
Location: Raleigh, NC
Posts: 692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
kyle_baker is an unknown quantity at this point
Send a message via AIM to kyle_baker Send a message via MSN to kyle_baker Send a message via Yahoo to kyle_baker Send a message via Skype™ to kyle_baker
i have a problem fairly similar, when i start my car after letting it sit over night i hear a squeeking noise sometimes, when i take the rpms up to alittle about 1000rpms it stops squeeking, but when they fall below again it squeeks, the noise goes away once the car has warmed up to running temps but its really annoying. I'm thinking it may be a loose fan belt or something but haven't looked close yet, any suggestions?

oh yeah, my idle is kinda rough when first started, like bouncing from 500-900 until it warms up. sometimes if you rev it a few times after starting it the idle smooths out alittle.

anyone?
kyle_baker is offline  
#8 (permalink) Old 03-29-2005, 07:31 PM
3rd Gear Member
 
kyle_baker's Avatar
 
Join Date: Jun 2004
Location: Raleigh, NC
Posts: 692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
kyle_baker is an unknown quantity at this point
Send a message via AIM to kyle_baker Send a message via MSN to kyle_baker Send a message via Yahoo to kyle_baker Send a message via Skype™ to kyle_baker
kyle_baker is offline  
#9 (permalink) Old 03-29-2005, 08:33 PM
1st Gear Member
 
Join Date: Oct 2004
Posts: 332
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
3serbmdubya is an unknown quantity at this point
that squeak could be your pulley on the alternator. while its running just spray some wd-40 on it (the pulley) and dont worry it wont harm your alt because wd-40 is electronics safe and squeaking should go away. otherwise i'd say its your belt

<img src='http://img73.exs.cx/img73/8618/post-4-1069548360.jpg' border='0' alt='user posted image' />
3serbmdubya is offline  
#10 (permalink) Old 03-29-2005, 09:08 PM
3rd Gear Member
 
kyle_baker's Avatar
 
Join Date: Jun 2004
Location: Raleigh, NC
Posts: 692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
kyle_baker is an unknown quantity at this point
Send a message via AIM to kyle_baker Send a message via MSN to kyle_baker Send a message via Yahoo to kyle_baker Send a message via Skype™ to kyle_baker
ok, i'll try this tomorrow and let you know how it goes
kyle_baker is offline  
#11 (permalink) Old 03-30-2005, 06:19 PM
3rd Gear Member
 
kyle_baker's Avatar
 
Join Date: Jun 2004
Location: Raleigh, NC
Posts: 692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
kyle_baker is an unknown quantity at this point
Send a message via AIM to kyle_baker Send a message via MSN to kyle_baker Send a message via Yahoo to kyle_baker Send a message via Skype™ to kyle_baker
well sprayed the pulleys, think it helped alittle, we'll see as time goes by.
kyle_baker is offline  
#12 (permalink) Old 04-01-2005, 06:36 PM
2nd Gear Member
 
Join Date: Jul 2004
Location: NYC
Posts: 449
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
NeverLeaned is an unknown quantity at this point
Send a message via AIM to NeverLeaned
First, A question..... Why use starter fluid for this test??? All I keep thinking is its the equivlant of pouring gas all over your hot engine

Now the "easy" vaccum test. Grab some vaccum tube from your local autoparts store (you can even use some of that fish tank hose for testing)

Remove on end of the hose from the car, trace out where it goes and remove that end too.... then in its place use the hose you bought at the autostore. (Don't route it nice and neat) Your gonna repeat this process with each hose until your troubles disappear....... then replace the bad hose.

Shouldn't take more then 30 minutes to test every hose.

Good luck
NL

1996- BMW 328IS
<img src='http://img.photobucket.com/albums/v242/gws226/TEX/neverleanedsig.jpg' border='0' alt='user posted image' />
Performance: Zimmerman Cross Drilled Rotors-- PBR Deluxes-- Cosmos CAI---- Turner Pulley Kit--- Fan Delete mod---
Beauty: 18 polished M-Parallel replicas, Inpro Euros w/ Enchanced Angel eye kit, 20% tint
Clear corners/sidemarkers ---- Eurospec (Depos)

To do list:
Suspension--- researching
UUC System U TDM- 3/05
M50 manifold converstion 3/05
off to the tuning shop for custom software 4/05
Cams/lightened flywheel, throttlebody........ well lets see what happens
NeverLeaned is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
97 540ia, Coolant leak, but cant find the source! ///Matt 5-Series (E12,E28, E34, E39, E60) 7 11-08-2005 11:25 AM
Oil Leak htp.bmw 3-Series (E21, E30) 6 09-07-2005 12:15 AM
Oil Leak By Filter Housing. Wtf?? victorgallas 3-Series (E36) 12 03-08-2005 02:22 PM
Oil leak... Regnout 3-Series (E36) 21 11-07-2004 09:06 PM
faster leak when cold. dubumb 5-Series (E12,E28, E34, E39, E60) 12 02-02-2004 09:42 PM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome