Piston Slapping site

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Northstar Engines and System Technical Discussion Discussion, Piston Slapping site in Cadillac Engine Discussion; http://www.pistonslap.com/...
  1. #1
    carguy16's Avatar
    carguy16 is offline Cadillac Owners Enthusiast
    Join Date
    Jul 2004

    Piston Slapping site


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  3. #2
    carguy16's Avatar
    carguy16 is offline Cadillac Owners Enthusiast
    Join Date
    Jul 2004
    Thread Starter

    Re: Piston Slapping site

    oh, it mentions the Northstar for Piston slapping, there was a Caddy driver here, I believe she mentioned something similar to this...and it didnt go away.

  4. #3
    BeelzeBob's Avatar
    BeelzeBob is offline I'm a Cadillac Fanatic!
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    Dec 2002
    Fort Lauderdale, Florida

    Re: Piston Slapping site

    Most all "piston slap" complaints on Northstars end up being related to excessive carbon build up in the combustion chambers. The carbon in the squish areas of the chamber builds up and contacts the piston at TDC causing it to rock slightly (harmless) and make the piston slap noise. This is almost always more prominent when the engine is cold due to the increased clearances until the engine warms up. It is very easily prevented/fixed by a few good WOT blasts on the freeway to clean the carbon out. Much easier than any other possible fix. Just an occasionaly dose of WOT will keep the carbon and piston slap away.

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