Compression PSI for 1997 Catera

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Cadillac Catera and Cimarron Forum Discussion, Compression PSI for 1997 Catera in Past Cadillac Vehicle Discussion; Does anyone know what the psi is for a compresstion test. I have to check one of my cylinders and ...
  1. #1
    poohjlg is offline Cadillac Owners Member
    Join Date
    Jul 2013

    Compression PSI for 1997 Catera

    Does anyone know what the psi is for a compresstion test. I have to check one of my cylinders and need to know the psi. Thank

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: Psi for 1997 catera

    Within 10% of the other 7 cylinders, engine warm, no spark plugs installed, throttle blocked wide open, ignition disabled, at least 3 full crank rotations. Probably around 155# or so.

    If a cylinder is low, squirt in a half teaspoon of engine oil. Now, if the compression comes up, it's ring problems; if the compression stays about the same it's a bad valve.

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