Catalytic converter
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Catalytic converter in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; My 04 cts with the 3.6 through a code 420 yesterday which I read as being catayst system effiency below ...
  1. #1
    Jaxle67's Avatar
    Jaxle67 is offline Cadillac Owners Member
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    Catalytic converter

    My 04 cts with the 3.6 through a code 420 yesterday which I read as being catayst system effiency below threshold bank one. Im assuming that means its converter time. My quedtion short of going to dealer is there any bolt in options say from rock auto or are they going to a universal type fit. I g
    Havent had access to a lift yet to check theconnections out..Do they have bolt on flanges or w hat kinda of arrangement am I looking to find jesse

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    Iceman_jd's Avatar
    Iceman_jd is offline Cadillac Owners Fanatic
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    Re: Catalytic converter

    Not necessarily a bad cat check these websites out> http://www.obd-codes.com/p0420 and http://www.p0420.com/

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    Jaxle67's Avatar
    Jaxle67 is offline Cadillac Owners Member
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    Yeah it drove and felt no different at all performance wise and hasnt come back on since i reset . I was driving it very heavy footed when it popped on. I might give it a few days and see what happens. If it does come back on i may go ahead and change both.im a welder by trade and can get magnaflows for 80 apiece with my company discount so welding on the flanges isn't no biggie then i know what i have. Jesse

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    Jaxle67's Avatar
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    Latest update is 420 popped back on. Im gonna order the magna flows and tig the flanges and what not on. The car has 150kmiles and had been babied since it was picked up at the dealership. Certainly could bennefit from a nice shiney new set anyway

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    Freeflyer is offline Cadillac Owners Member
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    Re: Catalytic converter

    Holy cow! 80 bucks?

    I can't find a Magnaflow cat for my cts for less than $400. Are they seriously marking it up that much?

    I am looking at buying the ones at gmpartsdirect.com, they are just under $300 each.

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    Re: Catalytic converter

    Quote Originally Posted by Freeflyer View Post
    Holy cow! 80 bucks?

    I can't find a Magnaflow cat for my cts for less than $400. Are they seriously marking it up that much?

    I am looking at buying the ones at gmpartsdirect.com, they are just under $300 each.
    You can if you buy the ones without flanges.

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    Jaxle67's Avatar
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    Yrah i think the cheapest i could find that bolt right in were in the neighborhood of 300 a piece iuse a auto parts store for the business ie work for so we get a nice discount plus for that price you get a converter and a box but I'm a mechanic welder by trade so I'm good at adding the flanges and the gaskets and a couple other things while I'm there

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    Freeflyer is offline Cadillac Owners Member
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    Re: Catalytic converter

    I wish I could weld them. That would save me a ton of money.

  10. #9
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    It might be worth talking to a welder but If its a dude at home with a small mig or even worse just a buzz box it might be better for you to buy the bolt ins a welder capable of doing the job that needs to be done properly isn't exactly cheap but sometimes you can find one willing to take on a small side job at a considerable savings. Its not really that big of a job to weld up .but certainly a bad weld job is nothing but trouble down the road

  11. #10
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    Quote Originally Posted by Freeflyer
    I wish I could weld them. That would save me a ton of money.
    What year is your car? The ECM and catalytic converters are warrantied for 8 years/100,000 km up here in Canada. US should be the same.

    Edit: just realized you specified 04. 1 year too late

  12. #11
    Kael's Avatar
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    Re: Catalytic converter

    have your car checked out first and make sure that you need the cats instead of a just a sensor.
    if you need the cats then you need to replace both at the same time.
    Davico makes them for us.
    http://www.ebay.com/itm/2004-2007-Ca...296c00&vxp=mtr

    I have two of these on my 2004 3.6L for a couple of years now. work great and bolted right in.

  13. #12
    Jaxle67's Avatar
    Jaxle67 is offline Cadillac Owners Member
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    I appreciate your reply and advice Kael and that's not a bad price for a bolt in option.I'm familiar with the magniflows and had good service out of them. Like i said i make a living for the last 30 + years working on cars trucks heavy equipment military equipment and i an also a certified welder for3 separate processes. Really the biggest reason i want to do it this way is the fact that i enjoying doing it plus the fact that i can and saving a few bucks is a plus

    ----------

    And yes i intend on doing both good insurance

  14. #13
    Kael's Avatar
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    Re: Catalytic converter

    Oh I just said it because the weird angles that the cat has.
    You would probably just build a jig and weld up the new cat into the old pipes.

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