Ok I'm lookin for advice on how, why, or what's going on with my car. I have a 88 Supra turbo and i have a descent build (if you need specs let me know). My issue is that my compression drops after about 2 months of driving the car. This is the fourth time its happened and I'm getting tired of it. The block has been decked and head hot tanked and decked also. The first time i put the car together i used an OG gasket. Car lasted 2 months....no hard driving...and it started "missing" and a little smoke. Check compression and cylinders 2-3 were very low (60psi). Removed head and found the gasket was bad. Bought a new gasket and tried again. 2 months later same thing. Low compresion in 1-2 (85psi). Removed head and gasket bad. Head was torque to 85lbs both times. Bought a metal headgasket due to my power goals changing. Took head in again to verify the head was flat. Shop said it was fine. I don't have the means to verify deck on the block or knowledge at this time. Placed new metal gasket on. Car ran fine for about 2 months and devoloped a "miss". I checked compression and 1-2cylinders low (90psi). I have the head off again and can see that the metal head gasket is coated in and oil/coolant film. All leaks were in the exhaust side of the head. I've done everything possible to get the head gasket to seal other than using stuff like the copper spray. I also bought ARP studs that i used this last yime with the metal gasket torqued @ 85lbs. Sorry for the long post but where am i going wrong. I'm actually starting to think that i have an issue with the head its self as being soft under heat cycles. Please help.
