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Message started by dave_d on 06/17/08 at 09:50:46

Title: exhaust leak
Post by dave_d on 06/17/08 at 09:50:46

Hello all. I've been reading all the post on this site for a few months, since i bought my 2006 s40 last september, love it and love this site.The snow starts flying at the end of november here in northwest Pa. so you can imagine what it was like waiting till May to ride. i did alot of reading and learning here. and again this site is great. My question is " can the slightest- littlelest exhaust leak between the muffler and header pipe cause backfireing when shifting".? i know theres a small leak between the header pipe and my jardine slip on. i tried to tightin it as much as i could and it still leaks . i was told a little leak wont cause the backfire. so im asking all the experts out there to please fill me in about what i can do. thanks and safe riding dave_d

Title: Re: exhaust leak
Post by meck on 06/17/08 at 10:08:17

I'm certainly not an expert, but here goes. How little is little? And does it really matter when you have a big pressure difference inside the pipe vs the outside world? My opinion is "Not really". A leak is a leak. You can try some ultra-copper RTV to seal up that area and still have it removable, or you can weld it and be sure it's airtight.

Title: Re: exhaust leak
Post by dave_d on 06/17/08 at 12:47:19

thanks meck for the reply. is that available at auto zone?and do i remove the slip on to apply it ?

Title: Re: exhaust leak
Post by rpgpgmr on 06/17/08 at 12:59:36

When I installed my muffler, the fitting that they sent wasn't wide enough so I had to cut a small slit in it. I clamped it down with all my might, but exhaust was escaping through that tiny slit ... causing backfires. I eventually found the right fitting at Advance Auto Parts. It was an exhaust fitting with 1 5/8 internal diameter. I slipped it on and bye-bye leak.

So, yes, a leak is a leak. Whether you use a sealant or a new fitting (that's what I'd try), that leak must be stopped.

Title: Re: exhaust leak
Post by meck on 06/19/08 at 04:55:51

5752455657330 wrote:

thanks meck for the reply. is that available at auto zone?and do i remove the slip on to apply it ?

Yes I got mine at AutoZone. I'm not sure about whether or not to remove the slip-on and apply it to the whole fitting. If the whole fitting doesn't have a thin smear of the stuff, you may be introducing small paths for air to enter. If it were me, I would apply a very thin, even layer on the fitting, put it together, then apply another line at the joint. Be sure to let it cure at least overnight, if not 24 hours, before exposing it to that heat.

Title: Re: exhaust leak
Post by T Mack 1 on 06/19/08 at 06:40:45

Dave_D,
I picked up my 2001 eBay special in Erie last July. It was a rolling frame with engine in pieces. It had died for the previous owner on I-90 on his way home from work on 2nd shift.

Even thought you don't get a lot of ride time during the year, make sure you change the oil.

T Mack