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sort of complex and i really just need confirmation but...

long story short i over revved my 240sx a couple times and eventually the car wouldnt run so i compression tested it and found cylinder 3 to hold almost no compression. so i yanked the motor, replaced the piston rings(my first guess) and put it back in. no dice. motor still wont start and compression on cylinder 3 still bad. so i yanked the head off and took apart the valvetrain thinking i bent a valve or something so they wouldnt seat correctly. i havent replaced anything yet but the valves, springs, cam, ect. look fine(as fine as can be on a 140k motor). i will replace these anyways but if there is some idea that someone has that maybe im missing any help would be appreciated

im SICK of my car sitting in my garage so PLEASE find something im forgetting or doing wrong!!!
 

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KA24DET
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1,000 Posts
Is the head gasket okay? Are all the valves sealing properly? Make sure you check all three valves on #3 cylinder for proper actuation. You may have one of the weird occurances of a bad valve. Also, if you really beat the crap out of your engine, you could have a warped head. If all else fails, take the head to a machinist to have it remilled.
 
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