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Unread 10-06-2009, 05:45 PM   #1
abadjay
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best way to fix exhaust leak without welding? quick dirty fix

hey guys I need some advice for patching an exhaust leak without welding. To make a long story short my exhaust severed right before my cat because the previous owner decided to ghetto rig a new cat on. so now I need to ghetto rig ghetto rigging... ugh...

anyway i managed to track down an adapter to put the exhaust back together. when all said and done there is a small, but noticeable leak. not a big deal for my standards and this quick dirty fix, but It wont pass inspection/emissions.

I need a cheap dirty fix. I would love to do this the right way but Im unemployed right now and money is tight. I plan to get a whole new downpipe when I get a job. (mine is pretty rusted, it will probably be shot in a year) Iv tried JB Weld on exhausts before and it never holds more then a day, is there any decent product out there that I could slap on there and have it hold for at least a few months?

By the way before anyone says bring it to an exhaust place to weld it for 20 bucks, I wish I could but your not going to be able to weld where this leak is (top of pipe inside the cross-member.)

Thanks in advance!

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Unread 10-08-2009, 01:13 PM   #2
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so by the lack of replies Im guessing nobody has had any good luck with patching a leaky exhaust. A friend suggested furnace cement. Im going to give that a try and if I have good results Ill post it for other people possibly looking for a quick temp fix.
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Unread 10-08-2009, 01:16 PM   #3
93jeepyj
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Auto parts stores sell an exhaust patch kit for around 10 bucks thats basicly some kind of heat tape and probably something very similar to the furnace cement. I'd weld it up for you if you were closer, also ive had midas weld an exhaust doing the same thing on a junk car I had years before I started welding, the guy did it for 20 bucks cash I think and it was in it out in 10 mins.
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Unread 10-08-2009, 01:16 PM   #4
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Is it leaking from a clamped together joint?
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Unread 10-08-2009, 01:47 PM   #5
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band clamp
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Unread 10-08-2009, 01:52 PM   #6
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Get some exhaust cement at your local auto parts store. Apply it around the areas with leaks and it will harden up and seal it up. Just make sure to get it off your fingers right away before it dries.
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Unread 10-08-2009, 02:07 PM   #7
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Originally Posted by B2CARPEN View Post
Get some exhaust cement at your local auto parts store. Apply it around the areas with leaks and it will harden up and seal it up. Just make sure to get it off your fingers right away before it dries.
yea, you can buy this wrap stuff with some kind of epoxy/cement in it. I tried it once, never worked...just fell off and was a mess to work with. you might be able to make it work in a pinch.
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Unread 10-08-2009, 02:12 PM   #8
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Exhaust bandages. Very inexpensive and just require you to wrap it like you would wrap an ankle. All of the wraps I've seen are white wrap, but if you don't care about the color... that is your best bet.

Most discount auto parts stores will carry it.
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Unread 10-08-2009, 02:12 PM   #9
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yea, you can buy this wrap stuff with some kind of epoxy/cement in it. I tried it once, never worked...just fell off and was a mess to work with. you might be able to make it work in a pinch.
And it looks like complete **** as well... but worked for me.
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Unread 10-08-2009, 03:26 PM   #10
Max-Q
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I had the same problem you are having. My exhaust was rotted out just before the cat and nobody could weld it because the skid plate was in the way. I used a 2-3 inch band clamp to cover it until I could afford a complete exhaust. It worked fine and I even passed the state safety and emissions inspections with the band in place.

I think I bought it from AutoZone.
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Unread 12-31-2013, 01:49 PM   #11
Brutus1983
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Another exhaust leak...

Ok, I've isolated my leak at the manifold. There's a small crack right where they bolt onto the block. What can I use to stop this leak without taking the manifold off? It's a 258 ci with the manifold bolted onto the driver side of the block.

Any help would be appreciated.
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Unread 12-31-2013, 02:16 PM   #12
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There's a better thing than the bandages (which don't last long) available from some parts stores. It's basically thin stainless sheet which you wrap several turns around the pipe and clamp. Only works on straight sections of pipe though.
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Unread 12-31-2013, 02:24 PM   #13
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Originally Posted by Brutus1983 View Post
Ok, I've isolated my leak at the manifold. There's a small crack right where they bolt onto the block. What can I use to stop this leak without taking the manifold off? It's a 258 ci with the manifold bolted onto the driver side of the block.

Any help would be appreciated.
That's a tough one. There is a steel filled high temperature compound that I've used to seal small leaks but I doubt you'll be able to do it with the manifold in place.
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