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Old October 13th, 2019, 19:17
blu3fan's Avatar
blu3fan blu3fan is offline
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Location: california
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xj downpipe to cat leak

Hey guys.
So Ive been battling with this for years. My frontpipe/downpipe where it connects to the cat. leaks.
I have the paper/metal square gasket that i have replaced over and over now they only seem to keep it sealed for a few months.
Does anyone else have a good fix for this aside from welding it?
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Old October 13th, 2019, 19:50
Runnin'OnEmpty's Avatar
Runnin'OnEmpty Runnin'OnEmpty is offline
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Join Date: Apr 2003
Location: Southeast USA
Posts: 1,111
Re: xj downpipe to cat leak

The union is probably slightly misaligned for some reason.

I'd try cutting my own gasket(s) out of thin steel or copper, using the
original gasket as a template. Two or three layers of cut-out gasket
should do the trick. A roll of roof flashing material from the big box
store would be a good source for the metal.
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