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Author Message   Jimmy77 Posted on Monday, October 02, 2006 - 04:35 pm:        What should the compression be on the 1203 engine?   Spiderman Posted on Monday, October 02, 2006 - 05:05 pm:        what color are the heads?   Blake Posted on Monday, October 02, 2006 - 11:16 pm:        If I recall correctly, a '97 Cyclone should be showing at least 150 psi during a hot compression test. Much more than 180 psi could be problematic.   Jimmy77 Posted on Monday, October 02, 2006 - 11:23 pm:        Not sure what color the heads are. Will see tomorrow when I'm buying it. I figured about 150 psi new from the factory, but I've never heard of and engine being higher than stock. Normally lower compression would be a sign of a worn engine, and a variance of more than 10 psi could mean a warped head.   Captainkirk Posted on Tuesday, October 03, 2006 - 12:51 am:        Compression can and will be higher with an excessive buildup of carbon on the head and/or piston dome.   Jimmy77 Posted on Tuesday, October 03, 2006 - 08:38 am:        Good to know...   Bomber Posted on Tuesday, October 03, 2006 - 09:43 am:        variance could also come from badly sealing rings, valve train issue, a leaky head gasket, and so on -- some expensive, some not . . . . .

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