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Old 03-04-2002, 10:25 PM   #1
Scooby Guru
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
MY00 RS/STi7
MY01 RS Both Silverthorne

Default Good way to check for exhaust leak

I'm sure alot of you have thought of this, but I remember reading alot of threads where people were looking for a way to find if there was a leak. I got in my car the other day and looked in the mirror and noticed the usual cold white exhaust smoke which is very visible right after startup during warmup. So the light bulb popped on in my head and I jumped on the ground to see tons of exhaust fumes shooting out from both ends of the midpipe and slamming into the ground. Probably pretty obvious, but might help some people out.
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Old 03-04-2002, 10:30 PM   #2
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Member#: 4461
Join Date: Feb 2001
Chapter/Region: NWIC
Location: Eugene, Oregon
02 2.slow


laser pointer in the dark works great too . I went out and bought one for 10 bucks or so. I had one....but it's attached to my s&w .40 Didnt think it'd be to smart waving that around.
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Old 03-05-2002, 11:16 AM   #3
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Member#: 9919
Join Date: Sep 2001
Location: Blacksburg, VA
1995 Legacy


I always just put my hand or a balled up rag over the tail pipe to block it. If the motor keeps running, chances are there is a leak somewhere. If you can try this and have somebody under the car, they are bound to hear where the exhaust is escaping, as it will now be the only place in the system where the exhaust can exit. I don't have a turbo though, so I don't know if this would apply since the blowoff valve might be the weakest link if you blocked the tail pipe off.
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Old 03-05-2002, 08:41 PM   #4
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Location: Hanover, MA, USA
2004 Forester XT 5sp


Park the car while it is running, get in and close all the doors and windows. See if you start to get tired.
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Old 03-06-2002, 01:28 AM   #5
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Location: Syracuse, NY

i dont feel so good!!!
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Old 03-06-2002, 01:53 AM   #6
Tim Sanderson
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Member#: 6486
Join Date: May 2001
Chapter/Region: MWSOC
Location: S.E. wisconsin
00 Impreza 2.5 RS
Blue Ridge Pearl


try taking a wet rag (really wet) & wrapping it around a connection & look for bubbles?
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Old 03-06-2002, 02:34 AM   #7
Eric SS
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Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2014 Q60S, 2016 Chevy SS
2000 2.5RS w/ EJ22T
swap and N20. gone. : (


I use a stethescope. You can hear exhaust leaks around the headers/exhaust manifolds very good even if you could barely hear them with only your ear. They are also good for checking for vaccuum leaks.

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Old 03-06-2002, 11:14 AM   #8
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Join Date: Oct 2000
Location: Charlotte, NC
2003 BMW Z4


I like the ideas of the stethscope but I don't have one so I use the good old fasion way of by the smoke on a cold morning start. But i might go pick up a stethscope since ylou can use them to listen to your motor to hear it making the weird noise you think you are hearing.
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