Removing Catalytic Convertor
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Joined: Dec 2013
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Removing Catalytic Convertor
I'm trying to remove my catalytic convertor to see if it's bad on my V-10. I've disconnected the convertor from the head pipe and it's holding onto the exhaust pipe. The clamp that held the convertor to the exhaust pipe kinda crimped the outside pipe tight onto the convertor pipe and I am unable to separate them. I don't want to cut it out or damage either pipes. Any thoughts on how to pull this sucker out??
Thanks
Z
Thanks
Z
Fleet Mechanic
Joined: Sep 2013
Posts: 1,303
Likes: 84
Try to pull the O2 sensor ahead of the converter. It should allow enough pressure out to tell the difference. You can also listen and feel the exhaust at idle. I had my wife's C as t plug up on her car last April it got so bad we couldn't get the the Appalachian mountains to get home. I pulled over and piped out the sensor. It was loud but we could safely do highway stopped and got home without incident. The local dealer replaced both under warranty.
Lead Driver
Joined: Nov 2008
Posts: 8,450
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From: South Jersey
If you get the truck up to temp and use a lazer temp gun check the exhaust before and after the cat. That will show you if its restricted also, my gf pontiac g6 just had this problem, no power wouldn't shift and was throwing all kinds of dash lights. Dealer said it had a bad PCM...after a three second scan with my temp gun i found the problem CLOGGED CAT. brought it back to the dealer told them what I FOUND and the next morning everything was replaced under warranty
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FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
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From: Stephensville WI
Usually, if your pipes are rusted, you have to destroy them to get them apart.
A torch, plasma cutter, sawzall with a metal cutting blade....all work well as implements of mass destruction.
Popping the O2 sensor will be enough relief to know if the cat is bad. If it is, replacing it all with aluminized pipe is fairly inexpensive and easier than trying to patch together a rusted rusty ball of rust.
A torch, plasma cutter, sawzall with a metal cutting blade....all work well as implements of mass destruction.
Popping the O2 sensor will be enough relief to know if the cat is bad. If it is, replacing it all with aluminized pipe is fairly inexpensive and easier than trying to patch together a rusted rusty ball of rust.
Posting Guru
Joined: Jan 2003
Posts: 1,719
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From: PA
You might be able to get them apart if you have access to an oxy aceteline torch. I have seperated mufflers this way. heat the area of the cat and wiggle, wiggle wiggle. sometimes it works, sometimes is doesnt.
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