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Unread 07-09-2010, 06:00 PM   #1
n1ml
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Catalytic Converter Problems on 97 TJ

I'm getting a rattling sound on my 97 Jeep TJ Sahara, 4.0 Litre, I6. I replaced the manifold last year (with great help from the forum), and I did the exhasust about 4 years ago. I need to replace the Catalytic Converter. Where is a good place to get a stock type replacement? I know the front connection to the manifold will come off easily. I think the rear connection to the exhaust pipes is real rusted and compressed due to the U-Bolt. It has 80,000 miles. Should I also just put in a new exhaust?
Thanks


Last edited by n1ml; 07-09-2010 at 08:48 PM..
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Unread 07-09-2010, 06:03 PM   #2
ReformedTJr
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I've been looking around at that very set of parts. You can get a basic replacement cat for about $100. Given the recent 4wd.com sale and the rebate that Dynomax is offering, you can get a Magnaflow cat with front pipe and a Dynomax cat back for under $250. I'm probably going to be doing everything soon.
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Unread 07-09-2010, 06:42 PM   #3
n1ml
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Can you give me a few more details? I went to the site but only find a $75 rebate on the muffler/pipe. How do you get the front pipe/cat/muffler/tail pipe in a single package?
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Unread 07-09-2010, 06:52 PM   #4
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Quote:
Originally Posted by n1ml View Post
I'm getting a rattling sound on my 97 Jeep YJ Sahara, 4.0 Litre, V6.
V6?...
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Unread 07-09-2010, 06:59 PM   #5
ReformedTJr
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Sorry it was 4wheelparts, not 4wd hardware. But they have the same offers. There isn't package, just two items. These two (and they're for my 2.5L, you may need something slightly different) come out to $290 with free shipping, and a $75 rebate on the cat-back brings the final total down to $215.

http://www.4wheelparts.com/Direct-Fit-Catalytic-Converter.aspx?t_c=74&t_s=49&t_pt=3299&t_pl=9769&t _pn=M%2fF23227
DynoMax Exhaust Systems-RH2
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Unread 07-09-2010, 07:00 PM   #6
ReformedTJr
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Quote:
Originally Posted by Knuckelhead View Post
V6?...
I'm giving him the benefit of the doubt that it's a I6, cause they're aren't too many 97 YJs either.
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Unread 07-09-2010, 07:14 PM   #7
Knuckelhead
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Originally Posted by ReformedTJr View Post
cause they're aren't too many 97 YJs either.
I missed that one...
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Unread 07-09-2010, 08:47 PM   #8
n1ml
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I guess that is what I get for typing in the dark and not proof reading, sorry. Yes, it's a TJ and an Inline 6.
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Unread 07-09-2010, 10:02 PM   #9
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Magnaflow carries an inexpensive replacement cat. Easy repair.
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Unread 07-10-2010, 12:53 PM   #10
n1ml
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I saw the universal type. How, what tool do I use to cut thru the front Stainless Steel pipe just in front of the converter? Also, is the O2 sensor difficult to get out?
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Unread 08-11-2010, 01:32 PM   #11
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So taking advice from many Wheelers on here, I recently sold my YJ 2.5l and got me a TJ with the 4.0. Now a week later I am releazing it is sluggish and seems less powerful than the 4 cyl? No engine light on, but you can hear the rattle from the cat breaking up inside. I took it to a local muffler shop just to make sure this was the problem and they have confirmed it. However, they price quoted me for $600 for new cat muffler installed. This is rediculous and I am not paying it. My question is has anyone ever gutted there cat and straight piped it? My 1997 has a sensor on the cat so do u think if i did this i would be able to move the sensor right behind where the cat sits on the pipe itself? Would this throw codes? Please help if u have done this or have any advice.
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Unread 08-11-2010, 01:53 PM   #12
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See my response in your other thread.
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Unread 08-11-2010, 02:02 PM   #13
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I have a 97 TJ I6 also that had the same exact issue.... I used a torch and a ton of elbow grease trying to get the cat seperated from the muffler with no luck. I eventually went with the Magnaflow Cat (which includes the downpipe from the manifold) and the Dynomax cat-back. Simple install after taking the saws-all to the old exhaust to get it out. I ended up getting all my parts locally. Got the Magnaflow at Oreilly's and the cat-back at Advanced Auto. They matched the online price for me so it was a no brainer.

The $75 rebate is just the icing on the cake. I have had the system on a for a couple of months and couldn't be happier.

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Unread 08-11-2010, 03:30 PM   #14
n1ml
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I just replaced the cat and muffler on my 1997 TJ. I got a nice $75 rebate on the muffler. It was a simple job. I got all theparts delivered to a nearby store, free shipping. Around $250 for cat,muffler and all pipes.
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Unread 08-11-2010, 04:00 PM   #15
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TJ Cat

I just oredered a Magnaflow Cat replacement for 199.00 and that was for a California one. Then I took to a local muffler shop and they cut out the old one, put on the new one, welded it and replaced the O2 Sensor all for $80.00 So the total package cost me 279.00. And the Cat was expensive becasue of California Rules. I saw them as low as $79 for other 49 states.
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