1rad280 Posted April 22, 2009 Share Posted April 22, 2009 After checking compression on my 280z, I found that the #1 cylinder had maybe 5 psi of compression. What should I do now?? Quote Link to comment Share on other sites More sharing options...
slown280z Posted April 22, 2009 Share Posted April 22, 2009 Do you burn coolant? Or oil? Or have milky coolant/oil? Do you have a loud "exhaust tick"? If so, it could definitely be a headgasket. Time to rip it apart. Quote Link to comment Share on other sites More sharing options...
1rad280 Posted April 22, 2009 Author Share Posted April 22, 2009 It has very little ticking in the exhaust, no milky coolant,no coolant off that I can tell.I did a wet compression test this morning and the compression jumped to 55 psi a couple of times so im guessing bad rings. This will be the 3rd time I have had this head off and yes I have replaced the head gasket each time and the head bolts the last time. Quote Link to comment Share on other sites More sharing options...
Gilli Posted April 25, 2009 Share Posted April 25, 2009 So, a bad head gasket can result in cylinder/cylinders not getting any compression at all? Quote Link to comment Share on other sites More sharing options...
1rad280 Posted April 25, 2009 Author Share Posted April 25, 2009 I will take the head off and see I hope its that but if I put oil in the cylinder and did a compression test and it pushed 55-75 psi unless it pushing the oil into the head and seal it?? I realy thing its rings but I hope maybe something like that is wrong I would be realy happy. Quote Link to comment Share on other sites More sharing options...
Gilli Posted April 25, 2009 Share Posted April 25, 2009 Yes it's most likely the rings if you did a leak down test and got higher numbers. Quote Link to comment Share on other sites More sharing options...
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