Stomung midpipe donut gasket

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Mar 2, 2003 | 07:50 PM

blackbok

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Stomung midpipe donut gasket

I just slapped in my SS Stromung midpipe last week (car has 19,000) and I DID NOT replace the dreaded donut gasket with a new one. Noticed today it is dripping water where the cat and midpipe meet.

Also, I noticed that on the cat end of the midpipe, the flange seemed to only be "tacked" on in a few spots. I assume this is part of the design and not an oversight in production, right? Does the "donut" seal those holes?

What I'm saying is, are these water droplets coming from the cat to mid normal, or a sure sign of a leak? I know there's some play with the spring bolts, so I do not know if any of this is acceptable.

...And I tigtened those spring bolts good!

Edit:
ran the car again at night with a flashlight on the spot. I could see the water vapor blowing out of there, so it is definetly a leak. I have heard of people needing spacers to get the donut further into the bigger diameter Stromung pipe. That doesn't sound right, since Stromung makes these specifically for these cars. Please tell me all I need is a new donut! (No sprinkles!)

Mar 22, 2003 | 01:24 PM

13Devils

Registered User

Joined: Feb 2003

Posts: 63

From: northeast PA

Car Info: 98 legacy gt

I think i know what you are talking about. the donut gasket for your stock pipe should fit on the aftermarket exhaust... i did the same thing but i have a 1.8L impreza and a Tanabe cat back for a 2.5RS and i just went to a muffler shop and told them that i needed a donut gasket for a 95 impreza L and they got it for me and it fit perfectly. it sealed up the leak, and it soundds so much better now. so.... you probably only need the new donut gasket.

Mar 22, 2003 | 02:42 PM

N/ABeast

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I used the original gasket and no leaks here. Did you make sure the gasket was in the little grooves in the flange?

Mar 22, 2003 | 08:40 PM

Peaty

Registered User

iTrader: (2)

Joined: Nov 2002

Posts: 1,644

From: Lawrence, Kansas

Car Info: 19' Impreza Sport Manual / 99 Miata / 13' OB

I had a similar problem, I ended up using some high temp silicone sealant on the joints. Ended the problem

Mar 31, 2003 | 10:03 PM

Roo

Forester Specialist

iTrader: (3)

Joined: Jan 2003

Posts: 3,985

From: Sonoma County

Car Info: '98/'04 Foresters (S & XT)

Donuts.....Try Krispy Kreme

I had a Random Tech cat installed, and they had to go to the local Krispy Kreme to get the right one!!

You would need to get an oversized gasket to fit.

Mar 31, 2003 | 10:29 PM

blackbok

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So I took it to a couple of different exhaust shops. Bothe said it was fine, no leaks, and that the drip from a cold start is normal. I also spoke with Sean at Suby Specialties, and he also said that with the way the spring connection is designed (to flex) you could never get a 100% seal.

So, I guess everything is fine. Feels good, I was just uncomfortable with that dripping water.