CAT Removal Procedure - JeepForum.com

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post #1 of 25 Old 09-20-2007, 04:42 PM Thread Starter
kdavis
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CAT Removal Procedure

Got my new CAT in today, went under there to start the install, only to realize...holy crap this things been on here for 180K miles...

Is there a method to this madness, or is it just brute force? I got the clamps loosened, just not sure how to remove the cat from the pipes.

Thanks.


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post #2 of 25 Old 09-20-2007, 04:46 PM
CLNinja
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BFH

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post #3 of 25 Old 09-20-2007, 04:48 PM Thread Starter
kdavis
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That took me a second...and I got it. Will the rear pipe retainer slide far enough out of the way, or do I have to unbolt it?

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post #4 of 25 Old 09-20-2007, 04:50 PM
indept
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a BIG DOG usually gets the cat out...Sorry couldn't resist

You need to heat the pipe red hot using oxy/ acetylene then bang the crap out of it.
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post #5 of 25 Old 09-20-2007, 06:17 PM
ArloGuthroJeep
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Screw that...cut it off with either a sawzall, dremell, or my favorite, a grinder

'04 WJ, 6" Clayton LA's, 242 SYE, 35" BFG MT KM2's, 4.56 gears, & D44a locked
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post #6 of 25 Old 09-20-2007, 06:18 PM Thread Starter
kdavis
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Do you guys think it would be easier to cut the cat then get the remnants off? I heated the thing up, didn't budge. I even tried taking my hydraulic jack sideways to it to see if I could get it off. I haven't given up yet, but if I could just cut it off with a sawzall, might be the way to go.

HA, that's funny, you were typing while I was...sawzall it is...

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post #7 of 25 Old 09-20-2007, 06:19 PM
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cut it


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post #8 of 25 Old 09-20-2007, 06:22 PM
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definitely cut it. I used a cutoff wheel to make a cut along the pipe, then peeled it back some and still had to beat the bag out of it. Then just welded it back up. Pickup one of those exhaust tailpipe expanders, that thing would work pissah compared to what I went thru.

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post #9 of 25 Old 09-20-2007, 06:39 PM Thread Starter
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I'm thinking if I can get it cut without getting into the exhaust, but leaving enough to grab onto, I can more or less beat the peices out after ward...just realized I'm out of metal sawzall blades, so off to the store tomorrow.

I'll report back later. I wish I had a cutting torch here.

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post #10 of 25 Old 09-20-2007, 06:40 PM
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buy a plasma cutter

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post #11 of 25 Old 09-20-2007, 06:49 PM
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tail pipe cutter

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post #12 of 25 Old 09-20-2007, 07:17 PM
gunthagunth
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Quote:
Originally Posted by kdavis
I'm thinking if I can get it cut without getting into the exhaust, but leaving enough to grab onto, I can more or less beat the peices out after ward...just realized I'm out of metal sawzall blades, so off to the store tomorrow.

I'll report back later. I wish I had a cutting torch here.
I tried cutting it back into tabs and peeling them back. It took forever and was definetly not worth it. I use one of these to expand it for a new pipe.
http://www.partsamerica.com/productd...egoryCode=3494

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post #13 of 25 Old 09-20-2007, 08:31 PM
sandman
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i cut slits in the cat where it overlaps the pipe then it slid right off.

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post #14 of 25 Old 09-20-2007, 08:42 PM
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cut mine off way up on the pipe toward the cat so that i woudnt cut my exhaust pipes -- then i took a sawzall and got the rest out of the exhaust pipes -- took a hour but it worked...

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post #15 of 25 Old 09-20-2007, 09:08 PM
indept
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Quote:
Originally Posted by gunthagunth
I tried cutting it back into tabs and peeling them back. It took forever and was definetly not worth it. I use one of these to expand it for a new pipe.
http://www.partsamerica.com/productd...egoryCode=3494
You used the guy & girl standing at the counter to cut it off
That link just goes to Partsamericas's front page, not a specific tool or anything.

Correction, they wanted my zip first, THOSE BASTAGES
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