car wont start :(

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

long story short eventually my ka24e 240sx stopped running 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!!!

(and dont tell me to swap because if i had the money i would have done that by now)

have you done a leakdown? that may help to find the problem.. you may have a crack in your block

damn that would suck. i dont know how do do a leakdown test but i do have a spare ka24e block laying around so maybe ill just use that...

go get a leakdown done at your local dealership or your mechanic and find out first..