Posted by Davidk on 04/30/08 - 4:23 PM
#9
Jeff...I have to put in my 2 cents on what you said about the compression changing when the engine is cold due to shrinking.
I would believe that the compression would be the same with a hot or cold engine. If there is shrinking in the metal, wouldn't the shrinking occur in both the block as well as the pistons/rings? If everything is shrinking (in the cold) or expanding (in the heat) it would be doing so in all parts, not just the block or piston. Therefore the compression would be the same regardless of the engine temp.