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Old 06-11-2002, 01:58 PM   #1
rlavalle
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Member#: 18384
Join Date: May 2002
Location: Seattle 'burb (Kirkland)
Vehicle:
2004 STi: 580 AWHP
Java Black Pearl

Question Up-Pipe & Down Pipe installed... Interesting noises... Leak?

Hi folks,

I installed a PDE Up-Pipe and a ScoobySport Down Pipe last night.

Took a total of about 6 hours, though I still need to put the heat shields back on. One glitch was an exhaust manifold to up-pipe bolt that loosened a bit, then seized. I ended up twisting the bolt in half. Just glad it wasn't a stud! Used plenty of WD40 too.

My question is, what does an exhaust leak on a WRX sound like?

I know that a header leak on a Big Block Chevy sounds like a tap-tap-tap...

I hear lots of interesting noises now, but not sure if any signify an exhaust leak. I'm hoping it's all turbo whine and normal exhaust sounds. I don't really hear anything unusual at idle, but cruising around at 2k to 3k rpms, I hear somewhat more pronounced whining/whooshing than when I removed my silencer.

I followed the Vishnu instructions. Much, much more thorough than the PDE instructions!

There are a LOT of exhaust fittings that get disconnected and reconnected:
Head to exhaust manifold
Exhaust manifold to cross pipe
Exhaust manifold to up-pipe
Up-pipe to turbo
Turbo to down pipe
Down pipe to mid pipe

Too many areas prone to failure. I used the old gaskets since my car only has 1200 miles on it. Replacing all 6 gaskets would cost a fortune!

Any feedback would be great!

Thanks
Russ
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Last edited by rlavalle; 06-11-2002 at 02:49 PM.
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Old 06-11-2002, 03:23 PM   #2
BeavisNuke
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TurboXS Stage 2.5

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Uppipe exhaust leaks are a high-pitched shrieking.

"Shreeeeeeeeeeeeeeeeeeeeeeeee"

You should have at least replaced the up-pipe gaskets. You can get both of them for like $30. Those are the areas where people have had problems with leaks.
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Old 06-11-2002, 03:34 PM   #3
rlavalle
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Hmmm... I don't think I have a shrieking, though I wouldn't mind an expert taking a listen.

I get more of a whooshing that matches RPMs. I'm hoping that's normal turbo sound.

Thanks,
Russ
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Old 06-11-2002, 03:53 PM   #4
MackDaddy
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Desert Khaki - CVT

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Quote:
Originally posted by rlavalle
Hmmm... I don't think I have a shrieking, though I wouldn't mind an expert taking a listen.

I get more of a whooshing that matches RPMs. I'm hoping that's normal turbo sound.

Thanks,
Russ
What you're hearing is normal... welcome to the wonderful world of the turbo sounds!!

Jim

Edit: you really should have replaced the up-pipe gaskets, at the very least. I replaced all of the gaskets when doing my up/down combo, except the manifold to head and 3rd cat/mid doughnut. You might be o.k., time will tell.

Last edited by MackDaddy; 06-11-2002 at 04:00 PM.
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Old 06-11-2002, 04:21 PM   #5
rlavalle
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Thanks for the info...

It "sounds" like I may be OK.

Yeah, I should have replaced all gaskets, but if I need to later, it'll be a lot easier than it was getting the the old up-pipe & down-pipe off.

Thanks again,
Russ
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Old 06-11-2002, 06:23 PM   #6
MackDaddy
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Location: Lewis Center, OH USA
Vehicle:
2013 XV Crosstrek
Desert Khaki - CVT

Wink Word, my brother

Quote:
Originally posted by rlavalle
Thanks for the info...

It "sounds" like I may be OK.

Yeah, I should have replaced all gaskets, but if I need to later, it'll be a lot easier than it was getting the the old up-pipe & down-pipe off.

Thanks again,
Russ
Good luck, and enjoy the drive!!!

Jim
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Old 06-12-2002, 11:48 AM   #7
DaveyREX
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Hey Russ,

I just had a Brullen Up-ipe and full turbo back installed and had somewhat the same question. Basically I hear a loader than usual swoosh sound around 2500-3000 RPM and yes it is just the turbo and the new Up-pipe. Less restrictive now so more air going thru the up-pipe. If you had a leak it would be a hi pitch squeal. Hope that helps
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Old 06-12-2002, 12:14 PM   #8
MAD REX
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Quote:
Originally posted by BeavisNuke
Uppipe exhaust leaks are a high-pitched shrieking.

"Shreeeeeeeeeeeeeeeeeeeeeeeee"

You should have at least replaced the up-pipe gaskets. You can get both of them for like $30. Those are the areas where people have had problems with leaks.
I just got my Godspeed uppipe with new gaskets installed and that's what I get.

The noise doesn't really bother me but...since there is a leak am I losing performance?
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