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rusted y-pipe problem

This is a discussion on rusted y-pipe problem within the External Engine forums, part of the LSx Technical Help Section category; Hey guys, sorry to ask again, but i got the y pipe off the manifolds and now i can't get ...

  1. #1
    Member Z28LS1's Avatar
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    rusted y-pipe problem

    Hey guys, sorry to ask again, but i got the y pipe off the manifolds and now i can't get it off the cat back. It is already connected to a flowmaster catback and i can't get it off. it looks like its rusted on. i've been trying a lot of wd-40/liquid wrench and torching it. Has anybody been in this problem? And how do i do i get the y-pipe off? thank you

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    First of all what are you doing? Are you putting longtubes and an off-road y-pipe on? You may just want to hack it off!

    I just read your previous thread. Cut a slot in the pipe about an inch long. That should allow enough flex in the pipes. You might need a slot in the top and bottom.

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    Member Z28LS1's Avatar
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    I am just trying to take off the stock y-pipe from my flowmaster catback so i can remove my exhaust manifolds and put on my headers. My problem is the stock y-pipe is stuck to the catback by rust i think. sorry if im being confusing, did that clear it up?

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Yes, you cleared it up. Cut 2 slits in the pipe.

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    Member Z28LS1's Avatar
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    sorry but im having trouble following u. i need to cut two slits in the pipe so i can get it to flex.. then what?

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    You have 2 pipes connected together. The first pipe is larger than the other so that the mid-pipe(which is smaller) fits inside of it. Put a cut in the larger pipe. It will loosen the slip fit connection.
    Last edited by 9t8z28; 01-09-2007 at 05:02 PM.

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    Member Z28LS1's Avatar
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    haha ok i understand now, you mapped it out well lol, thank you very much.. i'll give it a try...

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    Member Z28LS1's Avatar
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    its still not working that well, i'm going to continue to make more cuts and elbow grease but if anyone has another idea, it would be also appreciated, thank you

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    We'll be back... GatorSS's Avatar
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    Use some ionic penetrating oil such as BG In-Force.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    After you make slits in the pipe, make sure when you reattach it to the new pipe that you use a band clamp instead of a c-clamp. Or weld the slip fit connection together.

  11. #11
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    Quote Originally Posted by Z28LS1 View Post
    its still not working that well, i'm going to continue to make more cuts and elbow grease but if anyone has another idea, it would be also appreciated, thank you
    Still haven't got that shit off yet..................?
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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