dschock Posted December 18, 2008 Share Posted December 18, 2008 Hey guys, I just did a compression test on my 1971 240z. My results were 170 psi in five of the cylinders and 150 in one of them (cylinder 4). Is this anything to worry about? Also, what sort of results should I expect from my car? My engine has 156k original miles, and as far as I know it hasn't been rebuilt. Thanks! Quote Link to comment Share on other sites More sharing options...
gwnwar Posted December 18, 2008 Share Posted December 18, 2008 10% between clys is ok you're close.. might be tight valve adjustment.. Did you try it after alittle bit of oil put in plug hole.. Quote Link to comment Share on other sites More sharing options...
dschock Posted December 18, 2008 Author Share Posted December 18, 2008 I'm going to do the oil thing first thing tomorrow. Quote Link to comment Share on other sites More sharing options...
theghosttanker Posted December 20, 2008 Share Posted December 20, 2008 If you didn't check your valve lash before you did the compression test, you should do that first. Quote Link to comment Share on other sites More sharing options...
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