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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 04-27-2005, 10:24 AM   #1 (permalink)
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Can someone explain the system, I have heard it is a "bolt on system". Do the two cats come out together as one piece with some pipe on either end connecting them. Or do they each bolt up seperatly at their flanges? My cataylist has broken free and is rattleing to all hell. I want to remove them, bang them out (dont give a rats ass about emmisions i'm an american ). Just trying to save a few $$
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Old 04-27-2005, 07:33 PM   #2 (permalink)
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Quote:
Originally posted by tacroteau@Apr 27 2005, 11:24 AM
Can someone explain the system, I have heard it is a "bolt on system". Do the two cats come out together as one piece with some pipe on either end connecting them. Or do they each bolt up seperatly at their flanges? My cataylist has broken free and is rattleing to all hell. I want to remove them, bang them out (dont give a rats ass about emmisions i'm an american ). Just trying to save a few $$
[snapback]338280[/snapback]
Tacro -

From the postings i've read here and in Roadfly, replacing your cats with anything other than OEM can cause check engine light issues.

I have no first hand knowledge myself, so hopefully someone else with experience can chime in here. I've been reading this forum and Roadfly literally at least 1X per day every day since buying my 540 back in october, so I've picked up a lot of anecdotal 2nd hand knowledge like that.
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Old 04-27-2005, 07:35 PM   #3 (permalink)
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Quote:
Originally posted by tacroteau@Apr 27 2005, 11:24 AM
Can someone explain the system, I have heard it is a "bolt on system". Do the two cats come out together as one piece with some pipe on either end connecting them. Or do they each bolt up seperatly at their flanges? My cataylist has broken free and is rattleing to all hell. I want to remove them, bang them out (dont give a rats ass about emmisions i'm an american ). Just trying to save a few $$
[snapback]338280[/snapback]
BTW, was face-to-face with my cats this past weekend while changing my tranny oil and I saw nothing that looked bolted together - it all looked welded. Sorry. If your have been replaced once already , there's a chance yours are clamped on, but it's doubtful...
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Old 04-28-2005, 02:12 PM   #4 (permalink)
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Thanks for the help, you were right they are welded on. I took the car to Midas to have them checked out (really I just didnt want to jack it up and crawl under it, its free anyway) turns out the exhaust is perfect, I had a loose spare tire, and the bracket that holds it to the trunk well was rattling, what a dumbass. I didnt check the basics first. That was a cheap fix


Quote:
Originally posted by Eric S.+Apr 27 2005, 08:35 PM--><div class='quotetop'>QUOTE(Eric S. @ Apr 27 2005, 08:35 PM)</div><div class='quotemain'><!--QuoteBegin-tacroteau@Apr 27 2005, 11:24 AM
Can someone explain the system, I have heard it is a "bolt on system".* Do the two cats come out together as one piece with some pipe on either end connecting them.* Or do they each bolt up seperatly at their flanges?* My cataylist has broken free and is rattleing to all hell.* I want to remove them, bang them out (dont give a rats ass about emmisions i'm an american ).* Just trying to save a few $$
[snapback]338280[/snapback]
BTW, was face-to-face with my cats this past weekend while changing my tranny oil and I saw nothing that looked bolted together - it all looked welded. Sorry. If your have been replaced once already , there's a chance yours are clamped on, but it's doubtful...
[snapback]338560[/snapback]
[/b][/quote]
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Old 04-28-2005, 05:59 PM   #5 (permalink)
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Originally posted by tacroteau+Apr 28 2005, 03:12 PM--><div class='quotetop'>QUOTE(tacroteau @ Apr 28 2005, 03:12 PM)</div><div class='quotemain'>Thanks for the help, you were right they are welded on. I took the car to Midas to have them checked out (really I just didnt want to jack it up and crawl under it, its free anyway) turns out the exhaust is perfect, I had a loose spare tire, and the bracket that holds it to the trunk well was rattling, what a dumbass. I didnt check the basics first. That was a cheap fix


Quote:
Originally posted by Eric S.@Apr 27 2005, 08:35 PM
<!--QuoteBegin-tacroteau
Quote:
@Apr 27 2005, 11:24 AM
Can someone explain the system, I have heard it is a "bolt on system".* Do the two cats come out together as one piece with some pipe on either end connecting them.* Or do they each bolt up seperatly at their flanges?** My cataylist has broken free and is rattleing to all hell.* I want to remove them, bang them out (dont give a rats ass about emmisions i'm an american ).* Just trying to save a few $$
[snapback]338280[/snapback]

BTW, was face-to-face with my cats this past weekend while changing my tranny oil and I saw nothing that looked bolted together - it all looked welded. Sorry. If your have been replaced once already , there's a chance yours are clamped on, but it's doubtful...
[snapback]338560[/snapback]
[snapback]338854[/snapback]
[/b][/quote]
Gotta love the cheap wins when you can get them. The expensive stuff seems to sneak up all too often!
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