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 ...
- 07-02-13 03:08 PM #1Cadillac Owners Member
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- 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
- 07-07-13 02:51 PM #2
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.