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  1. #1

    Default Clogged Catalytic Converter

    I noticed a gradual loss of power over the last two months. I had a completely clogged cat converter and my mechanic knocked metal shavings out of it.

    Could the increased back pressure have damaged the pistons, piston rings, or cylinder walls?

    When I say completely clogged...I mean COMPLETELY "No Air At All" Clogged.

    Current Daily Driver:
    2003 Chevrolet Silverado 1500 - 4WD - 4.8L V8 - True Dual Exhaust Setup, Cat Delete, Cherry Bomb Glass Packs

  2. #2


    The good news is this 'usually' causes no damage. To be sure perform a compression check. If there is any damage it will be from raw fuel washing the cylinder walls and causing premature ring wear.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3


    I had this happen on my old '97 Suburban at 150,000 miles, I sold it to a friend I work with at 205,000 and it has 223,000 on it now, so I think you'll be O.K.

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