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Old 08-12-2009, 12:56 PM   #1
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Default Best way to remove a catalytic converter.

Well I am rebuilding my exhaust system and I had no problem getting my muffler off. I would like to install a new high flow cat and I can't get the old cat off. Is there a trick? I have an OA torch and a propane torch. Thanks for any help.
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Old 08-12-2009, 01:03 PM   #2
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I had a hi-flow cat installed on my ZJ at a muffler shop. I don't like exhaust work. I took the cat, $25 bucks and a 12 pack, no receipt. Bob's your uncle.
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Old 08-12-2009, 01:05 PM   #3
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mines is an 89 and I just unbolt it at the square flange,if needed I use a sawsall to cut the pipe to get it out,then just make sure everything is lined up with the new one and weld it up,I like to use a clamp to get it back out if I need to.
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Old 08-12-2009, 01:15 PM   #4
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i just cut mine off took like ten minutes for the whole job
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Old 08-12-2009, 02:14 PM   #5
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sawsall the crap out of it and weld in or clamp in a new one.
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Old 08-12-2009, 02:46 PM   #6
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Quote:
Originally Posted by kitsapfreerider View Post
Well I am rebuilding my exhaust system and I had no problem getting my muffler off. I would like to install a new high flow cat and I can't get the old cat off. Is there a trick? I have an OA torch and a propane torch. Thanks for any help.

You have a 95 so you wont have the square bolt on flange. Easiest way to get it off is with a grinder.

Unbolt the downpipe from the exhaust manifold and unplug the 02sensor.Remove it all and move to workbench. Run the grinder along the cat's flange where it slides over the downpipe till you just cut through it. Once you get beyond the downpipe it'll loosen and be easy to pull off.

Or you can grind upside down laying on your back if thats your thing...
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Old 08-12-2009, 03:06 PM   #7
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Take an air cutting wheel and cut along pipe where it connects to the down pipe . Its just crimped on so it will pull right off. I have a 96 and replaced mine the same way 3 days ago. Easy fix
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