Put a new head gasket in my 1990 Toyota Supra. ARP Bolts...Torqued at 90 FT PDS. Had the head machined. Put her all back together but could not get her started. Finally got her timed perfectly. (Very touchy timing) apparantly on tooth off on the Distributor and your screwed. Anyway finally got it right. But was still overheating and throwing codes. Fixed the sensors and bought a new radiator. Flushed the system...and finally (about 2 mos. of screwing around off and on) got her up and running. Running like a champ and NOT overheating!!! Im a happy camper and learned a hell of a lot (after about 50 hrs. of research and reading. I feel like I really know this car now!! Did it all myself (Im kinda just a back-yard mechanic) so I am very PROUD. Took her for a spin...Just got back...and shes purrrrring like a kitten. YES...I got my baby back and lovin' it!!!!!!!!!!!!!