The easiest way for the system to suck air is through the overflow can.

The engine spits and sucks into and from this can. If you keep it empty there's your pirate air.

ARP states specs of 70 lbs of torque. So if your mechanic can't read or follow instructions. Get one that can.

I used a 2.mm HKS stopper gasket. I torqued to 85lbs. But that's me.

when i first got my 87 supra non-turbo I had overheating problems too. Although at the same time my fan exploded and punctured my radiator. I thought that it was my fan clutch so i replaced the fan clutch, fan, and radiator and three weeks later the same thing happened. It turned out that all the trouble was due to me removing the plastic engine undercover. It caused the airflow into the engine compartment and through the radiator to be out of wack. IE. excess air flow from under the car into the engine bay and insufficient air flow through the radiator. That lack of air flow through the radiator is what caused my overheating problem. The excess air from under the car into the engine bay caused the fan blades to bend when driving and they hit on something (most likely the radiator) and broke off spinning about in the engine bay puncturing the radiator. Once i put the undercover back on i never had another problem with it overheating.

Although my 91 turbo doesn't have the undercover on it and i've got no problems with it. Nor does it have a fan shroud.

thanks for all the help.

What about the small electric fan in the front? It hasn't been coming on and yesterday it only heated up to almost 3/4.

If the fan isn't it, I will be checking out the head gasket problems.

some one suggested to me yesterday that i need to replace the fan clutch with a "flex fan".. has any done this? I have never heard of a flex fan.. looked it up and couldn't find much on it.