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Exhaust donut Leaks 2002 Liberty 3.7


This is a discussion on Exhaust donut Leaks 2002 Liberty 3.7 within the KJ General Discussion forums, part of the Jeep Liberty - KJ (02 to 07) category!
Register to remove these ads. It's free! Hello! can somebody please help me find the part numbers & share some ...

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Old 02-12-2018, 11:15 AM   #1 (permalink)
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Default Exhaust donut Leaks 2002 Liberty 3.7


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Hello! can somebody please help me find the part numbers & share some info on what I need to replace the leaky donuts on my exhaust?

2002 Liberty Unlimited 3.7l 150k miles.

Looks like its leaking between the cat & the resonator. Im looking for a quick fix so I can pass NYS Emissions/safety test.

Could the clamp be loose? Do I need to change clamps as well or are they reusable?

are the aftermarket exhaust parts good to use?

thanks. Valery
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Old 02-12-2018, 12:14 PM   #2 (permalink)
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Hmm. I just replaced the Y pipe that has the 3rd catalytic converter on it.
The 2 donut gaskets I used was for the left and right side where it attaches to the downpipes The end of the y pipe attached to the muffler. The clamp was welded to the pipe. There was a smaller donut gasket there.
You will know the diffence because the front 2 are double the size of the rear one if not larger
I think fel pro calls it 5019149AA
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Old 02-12-2018, 01:16 PM   #3 (permalink)
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the mopar parts sites only lists the manifold gaskets parts numbers

still searching...
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Old 02-12-2018, 02:20 PM   #4 (permalink)
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Use rock auto or Advance auto. I was able to get all 3 of mine from them. Chances are they will give you the smaller ones because their system lists the small ones for front and rear. Which really screwed me up when I got back home.
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JBA UCAs
JBA .25" top plates and .25" rings
245-70-16 Cooper AT3s
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Old 02-12-2018, 02:49 PM   #5 (permalink)
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Originally Posted by Aceofspades View Post
Hmm. I just replaced the Y pipe that has the 3rd catalytic converter on it.
The 2 donut gaskets I used was for the left and right side where it attaches to the downpipes The end of the y pipe attached to the muffler. The clamp was welded to the pipe. There was a smaller donut gasket there.
You will know the diffence because the front 2 are double the size of the rear one if not larger
I think fel pro calls it 5019149AA
TOO many choices online! I guess there were many different setups for 2002.

I guess Ill have to take them out and then match them up.

there is a really large one listed. Is that the one you said I need for the top?
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Old 02-12-2018, 04:14 PM   #6 (permalink)
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I posted the felpro part numbers for the fronts before just can’t remeber where
https://www.rockauto.com/en/catalog/...et+/+seal,5836

Rock auto. 02 jeep 3.7 exhaust , pipe flange gasket seal section. Very bottom are the large ones for the front
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JBA .25" top plates and .25" rings
245-70-16 Cooper AT3s
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Old 02-13-2018, 10:29 AM   #7 (permalink)
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Default HELP -I need a patch product!

crawled under to have another look!

woops! the gasket is still holding pressure but the Cat exit pipe has the leak!

looks like someone once tested the pressure by making holes in the pipe then welded them up. One hole -the hardest one to weld on the bend near the flange is open again!

so I'll need to patch that up for the NYS Inspection. (replacement parts will be ordered later)

does anybody have a good exhaust patch to recommend??
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Old 02-13-2018, 11:06 AM   #8 (permalink)
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Depends. If you want to get by for cheap
https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds

Or have a muffler shop weld it up

I’ve used this tape to get me by until my new exhaust came in
It held up through a mud bog last summer and never came off
Just make sure you follow instructions

IMHO a cheap fix is just that... you usually get what you pay for even if it’s just until you can afford a proper fix or replacement
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Rear-OME 132L/OME 2948 springs
JBA UCAs
JBA .25" top plates and .25" rings
245-70-16 Cooper AT3s
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Old 02-13-2018, 11:43 AM   #9 (permalink)
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Originally Posted by Aceofspades View Post
Depends. If you want to get by for cheap
https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds

Or have a muffler shop weld it up

Iíve used this tape to get me by until my new exhaust came in
It held up through a mud bog last summer and never came off
Just make sure you follow instructions

IMHO a cheap fix is just that... you usually get what you pay for even if itís just until you can afford a proper fix or replacement
MUFFLER shops around here might cost as much as a new converter!
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Old 02-13-2018, 12:18 PM   #10 (permalink)
 
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You can also give JBWeld a try or the exhaust wrap listed above. Just whatever it says for the cure time (typically 24 hours) make sure you wait until its 100%. I also wouldn't expect it to hold more than a day or two so I would get it inspected right away after the cure period is over.
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