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W210 cat replacement or removal

Discussion in 'Engine' started by rgracin, Mar 25, 2012.

  1. rgracin

    rgracin Member

    Messages:
    49
    Joined:
    May 4, 2010
    Location:
    Essex/suffolk
    Car:
    2007 E63 AMG Estate
    Hi

    I have the dreaded rattle on one of my rear cats on me E430 estate. I'm looking at various options. One of which is just removing the rear cats as there are no sensors that far down the exhaust. Will this work, or would I have emissions problems at MOT time?


    Any advice would be appreciated on the best thing to do, and if that is replacement, what ones to get.


    Thanks


    R
     
  2. EndPoint

    EndPoint Banned

    Messages:
    212
    Joined:
    Mar 23, 2012
    Car:
    w203 M111 E20 ML EVO
    why dont u have it replaced instead ?
     
  3. andy27168

    andy27168 Hardcore MB Enthusiast

    Messages:
    4,190
    Joined:
    Nov 27, 2004
    Location:
    Southampton
    Car:
    1997 C230K, 1999 C43/55 AMG
    Hi,
    Is the rattling that noticable? One of the lower cats rattled on my 43 but before I could do anything about it the rattling stopped, the broken bits of the core of the cat probably got blown out of the exhaust system or jammed in the middle box. Unless the rattle is really loud or annoying leave it alone. You could remove the lower cats and the car should still pass the emissions. I have since removed my lower cats and middle resonator box and it passes the emissions ok.
     
  4. Dichtung

    Dichtung Hardcore MB Enthusiast

    Messages:
    267
    Joined:
    Oct 16, 2007
    Location:
    N.W.
    Car:
    W210 300td, W203 C180K
    If fitted originally, haven`t cats to be present (well at least visible) for the new MOT regs.?
     
  5. andy27168

    andy27168 Hardcore MB Enthusiast

    Messages:
    4,190
    Joined:
    Nov 27, 2004
    Location:
    Southampton
    Car:
    1997 C230K, 1999 C43/55 AMG
    The O/P still has his CATs there, hence my comments to leave them alone unless the noise was to obtrusive.
     
  6. Dichtung

    Dichtung Hardcore MB Enthusiast

    Messages:
    267
    Joined:
    Oct 16, 2007
    Location:
    N.W.
    Car:
    W210 300td, W203 C180K
    Agreed 100%, and hope that the innards blow out or jam as yours.

    But the OP is thinking that removing the cat/s completely is an option?
     
  7. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

    Messages:
    1,583
    Joined:
    Oct 1, 2011
    Location:
    Birmingham
    Car:
    2x c43 Amg clio 172 turbo 314bhp
    Cut open, remove "brick" weld back up, and it will fly through emissions.
     
  8. OP
    OP
    rgracin

    rgracin Member

    Messages:
    49
    Joined:
    May 4, 2010
    Location:
    Essex/suffolk
    Car:
    2007 E63 AMG Estate
    Thanks for the replies guys. I'll leave it a while and see if the noise stops. Fingers crossed.

    Regarding the removal, my car has four cats, so if I remove the rear two, the front two will still be there. I like the idea of removing the bricks and welding up again. Hadnt thought of that!
     

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