Quote:
Originally Posted by LuckyRabbit4
I found that compression should be about 150psi in a 250 chevy.
Mine is: 130/120/150/120/120/120
I did see antifreeze on the 1st and 2nd plugs and unfortunately a little discoloration on the oil dipstick. I'm not sure why there is such a variation in the compression PSI if it's all suppose to be 150 like I've read.
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I just found another forum saying that the compression should about 130 from the manual. So why is the 3rd piston at 150? clog? valves too tight and can't escape the cylinder? just bad timing?