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Message: <blockquote data-quote="95-stang" data-source="post: 192668" data-attributes="member: 9031">I usually crank the engine until the gauge wont go any higher, a V8 is a lot of cylinders, you need to be sure you gave it a good turning over.What you are looking for are major differences, [if you were racing thats different again] say a new engine would give 180psi, a worn motor might be 150 all round. But if you have 7 cylinders that read 160, and 1 reads 110 [only examples btw] then you know there's a problem. Your figures dont look too horrendous, ok, theres a bit of difference , it could be the head gasket is not that good on the passenger side.Is this motor running bad, just wondered as to why you are having it tested?</blockquote>