E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Found a boost leak!!



Reply
 
Thread Tools Search this Thread
      04-01-2008, 03:05 PM   #1
turbotko
Lieutenant
turbotko's Avatar
67
Rep
527
Posts

Drives: 09 E90 M3
Join Date: May 2007
Location: georgia

iTrader: (3)

Found a boost leak!!

I had the car in the shop today to check out a bad ball joint in the front end, and noticed some oil residue around the intercooler inlet connector. Further inspection revealed the pipe that connects to the IC wasn't even connected, it was just chilling inside the IC inlet. I was able to pull it all the way out without pulling the metal clip out!!

It had to have come this way from the factory, no work has ever been done to the car in the front end or around the IC......I know because I'm the only tech that has ever worked on the car, even did the PDI myself. BTW, I've never had a limp or C/E light on and have been running V2 for 6 months.

Moral to the story, if any of you guys think you might have a boost leak it's worth checking out. I'm sure it was leaking, if oil can get out then so can boost. I've not driven the car since I fixed it, but it never did seem to pull as hard as I thought it should and would also ping on 93 octane and 15 psi of boost sometimes.
__________________
10 AW on fox E90 M3 with 2 pedals, gentleman’s ride
08 AW on fox E92 M3 also 2 pedals, a bit more rowdy
Appreciate 0
      04-01-2008, 03:10 PM   #2
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Yea it has to be a big leak, that's rather minor. After I got my charge pipe back on after it popped off and without the Oring it was leaking but didn't throw a code, but there was oil on the throttle body.
__________________
Appreciate 0
      04-01-2008, 09:49 PM   #3
Mr. Vapor
Private
7
Rep
48
Posts

Drives: still shopping...
Join Date: Dec 2007
Location: Rochester, NY

iTrader: (0)

how were you building boost if you blew off a charge pipe?
Appreciate 0
      04-01-2008, 09:55 PM   #4
Soni
Major General
Soni's Avatar
Canada
222
Rep
8,375
Posts

Drives: Just a car
Join Date: Feb 2007
Location: CANADA eh!

iTrader: (35)

Garage List
2007 335i Coupe  [9.00]
noobie question...how do we know if we have boost leak?
Appreciate 0
      04-01-2008, 10:04 PM   #5
asdflkijd
Aberry is a scammer
asdflkijd's Avatar
United_States
584
Rep
5,507
Posts

Drives: SGM E92 335i, AM E90 335i
Join Date: Jun 2007
Location: Seattle, WA

iTrader: (14)

Garage List
Quote:
Originally Posted by Soni View Post
noobie question...how do we know if we have boost leak?
boost gauge?
Appreciate 0
      04-02-2008, 03:10 AM   #6
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Quote:
Originally Posted by Mr. Vapor View Post
how were you building boost if you blew off a charge pipe?
He didn't blow it off it was just loose.

Quote:
Originally Posted by Soni View Post
noobie question...how do we know if we have boost leak?
Depends on the severity, either you cant boost at all, you wont know at all, or boost will spike and then dip and spike.
__________________
Appreciate 0
      04-02-2008, 08:26 AM   #7
turbotko
Lieutenant
turbotko's Avatar
67
Rep
527
Posts

Drives: 09 E90 M3
Join Date: May 2007
Location: georgia

iTrader: (3)

Quote:
Originally Posted by Soni View Post
noobie question...how do we know if we have boost leak?
I just happened to get lucky and find it. If the leak isn't bad enough you might not ever know. I've got a smoke machine in the shop and I think I'm going to cap the compressor inlets and throttle body pipe then pressurize the system with 15 psi of smoke to check for any more leaks. That's the best way IMO to find them.

I drove the car home last night and it does build boost faster now. It's a noticeable difference so it must have been leaking a decent amount.

Imagine trying to blow 15 psi of pressure into a pop bottle with your mouth.........now drill a small hole in the pop bottle and imagine how much harder it would be to build the same 15 psi of pressure. That's what a boost leak does to your poor snails!!
__________________
10 AW on fox E90 M3 with 2 pedals, gentleman’s ride
08 AW on fox E92 M3 also 2 pedals, a bit more rowdy
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 05:03 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST