Welcome to the North American Subaru Impreza Owners Club Tuesday July 28, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, 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 free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-26-2012, 01:25 PM   #1
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default Exhaust Leak - Fumes in cabin

2002 Wagon
Cold Air Intake. Everything else stock.

Bout 6 months ago I noticed that I was getting exhaust fumes in the cabin when the fan was on and at a stop. I did some searching around and found in most cases it was related to an exhaust leak in the area of the turbo.

I purchased and replaced all the exhaust gaskets from the graphite doughnut gasket forward this weekend. All of the gaskets were Grimmspeed at least 2x the OEM thickness. Except for the gasket that connects the downpipe to the midpipe, this one was Subaru OEM.

I cleaned all surfaces and torqued each connection per the service manual.

Sadly, the leak is still present. Exactly the same as before. If I lean over the passenger fender I can smell the exhaust and I can hear what sounds like an exhaust leak.

I'm not sure what to do next. Any suggestions would be appreciated.
* Registered users of the site do not see these ads.
RodentKJ is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-26-2012, 01:26 PM   #2
Danthrax
Scooby Newbie
 
Member#: 299368
Join Date: Oct 2011
Chapter/Region: Tri-State
Location: Pennsylvania
Vehicle:
2014 Impreza 2.0i
White

Default

I have the same problem, I'm swapping my exhaust for a turbo back because I'm almost certain it's the down pipe due to age.
Danthrax is offline   Reply With Quote
Old 11-26-2012, 01:39 PM   #3
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Quote:
Originally Posted by Danthrax View Post
I have the same problem, I'm swapping my exhaust for a turbo back because I'm almost certain it's the down pipe due to age.
So are saying that you think the downpipe from the turbo is cracked?

That damn heat shield around the downpipe can not be removed unless you cut the riots. So it makes it impossible to inspect.
RodentKJ is offline   Reply With Quote
Old 11-26-2012, 03:46 PM   #4
Danthrax
Scooby Newbie
 
Member#: 299368
Join Date: Oct 2011
Chapter/Region: Tri-State
Location: Pennsylvania
Vehicle:
2014 Impreza 2.0i
White

Default

Yeah, I sealed where my down pipe and invidia CBE join together with gasket maker and no difference. It's either between the turbo and down pipe or we both have a cracked or rusted through down pipe. Either way, an aftermarket one is my choice to fix this. I'm just a little sad about HAVING to tune afterwards ):
Danthrax is offline   Reply With Quote
Old 11-26-2012, 03:54 PM   #5
Tenament
Scooby Newbie
 
Member#: 246813
Join Date: May 2010
Chapter/Region: NWIC
Default

This advice is not directly related to your exhaust issue, but pleeeease take that CAI off. Please please please please. Don't ruin your car.

As for tuning with a downpipe, our EJ205's do not need a tune after installing turbo-back exhaust. It is recommended, and I saw a very healthy increase when I flashed a stage-2 tune with turbo-back, MBC (boost controller), and stock everything else.

I used XPT's $50 off-the-shelf tune and am very happy with the money spent.
Tenament is offline   Reply With Quote
Old 11-26-2012, 04:05 PM   #6
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Quote:
Originally Posted by Danthrax View Post
Yeah, I sealed where my down pipe and invidia CBE join together with gasket maker and no difference. It's either between the turbo and down pipe or we both have a cracked or rusted through down pipe. Either way, an aftermarket one is my choice to fix this. I'm just a little sad about HAVING to tune afterwards ):
I'm going to do the Seafoam trick tomorrow night so I can see exactly where the leak is coming from.
RodentKJ is offline   Reply With Quote
Old 11-26-2012, 04:32 PM   #7
Mulder
Trust no one
Moderator
 
Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

Default

Check the EGT sensor, it could have come out or gotten loose.
Mulder is offline   Reply With Quote
Old 11-26-2012, 04:35 PM   #8
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Quote:
Originally Posted by Mulder View Post
Check the EGT sensor, it could have come out or gotten loose.
1. Wouldn't I get a check engine light?
2. Can you point me to where this is located on the engine?

Thx
RodentKJ is offline   Reply With Quote
Old 11-26-2012, 06:07 PM   #9
Nick69
Scooby Newbie
 
Member#: 326043
Join Date: Jul 2012
Chapter/Region: NWIC
Location: Vancouver,Washington
Vehicle:
05 WRX

Default

Is there visible fumes/smoke coming through your vents? This was happening to me and it turned out to be a leak somewhere along the steering column that was having power steering fluid drip on to my downpipe and come through the vents.
Nick69 is offline   Reply With Quote
Old 11-26-2012, 06:10 PM   #10
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Quote:
Originally Posted by Nick69 View Post
Is there visible fumes/smoke coming through your vents? This was happening to me and it turned out to be a leak somewhere along the steering column that was having power steering fluid drip on to my downpipe and come through the vents.
No.
This is without question an exhaust leak.
RodentKJ is offline   Reply With Quote
Old 11-27-2012, 09:14 AM   #11
Yakattak
Scooby Newbie
 
Member#: 284332
Join Date: May 2011
Chapter/Region: NESIC
Vehicle:
2003 Impreza WRX
Platinum Silver Metallic

Default

OP, is it like fresh gas? After a cold start?
Yakattak is offline   Reply With Quote
Old 11-27-2012, 09:17 AM   #12
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Quote:
Originally Posted by Yakattak View Post
OP, is it like fresh gas? After a cold start?
No. As I mentioned before. It's exhaust.

And I know where you were going. It's not the know fuel leak issue experienced during cold temp start-ups.
RodentKJ is offline   Reply With Quote
Old 11-27-2012, 11:35 PM   #13
RodentKJ
Scooby Newbie
 
Member#: 225563
Join Date: Oct 2009
Vehicle:
2002 WRX Wagon
Midnight Black Pearl

Default

Update.

Using Seafoam I performed the smoke test. I about crapped myself when I saw how much smoke was leaking from the exhaust on the passenger side.

After further inspection it's the uppipe that is leaking. The smoke just pours out from the small space between the pipe and the heat shield where it connects to the exhaust pipe collector.

I did a little searching around and found that a cracked uppipe is not that uncommon.

So that is where I'm at. Looks like I need to replace the uppipe now. And hope that's all that is wrong.

How the hell does the uppipe crack or break?
RodentKJ is offline   Reply With Quote
Old 11-28-2012, 12:26 AM   #14
Patrick92
Scooby Newbie
 
Member#: 330541
Join Date: Aug 2012
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2004 STI
PSM (01G)

Default

Quote:
Originally Posted by RodentKJ View Post
How the hell does the uppipe crack or break?
Age...
Patrick92 is online now   Reply With Quote
Old 11-28-2012, 04:59 AM   #15
oguitar
Scooby Specialist
 
Member#: 206720
Join Date: Mar 2009
Chapter/Region: SWIC
Location: Albuquerque NM
Vehicle:
2002 WRX Wagon
Silver

Default

Quote:
Originally Posted by Patrick92 View Post
Age...
And heat.
oguitar is offline   Reply With Quote
Old 11-28-2012, 11:18 AM   #16
340Duster
Scooby Specialist
 
Member#: 52314
Join Date: Jan 2004
Chapter/Region: South East
Location: Following the green weenie
Vehicle:
2002 PSM WRX 16G-XT
'13 500 Abarth

Default

Quote:
Originally Posted by RodentKJ View Post
Update.

Using Seafoam I performed the smoke test. I about crapped myself when I saw how much smoke was leaking from the exhaust on the passenger side.

After further inspection it's the uppipe that is leaking. The smoke just pours out from the small space between the pipe and the heat shield where it connects to the exhaust pipe collector.

I did a little searching around and found that a cracked uppipe is not that uncommon.

So that is where I'm at. Looks like I need to replace the uppipe now. And hope that's all that is wrong.

How the hell does the uppipe crack or break?
There is a flex joint that breaks after significant time/ heat. Mine did the same thing, I replaced it with a catless one that had no joint. Ditch the EGT sensor and get a resistor for it.
340Duster is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump


All times are GMT -4. The time now is 01:58 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.