Got a question to ask
 

Yesterday I was driving my turbo 88 supra home, and forgot to turn on the rad fans friends like to turn the switch off when we get out of the car to go somewhere so the car doesnt run dead when they are with me. I noticed that I had smoke after driving it for a few minutes coming out of my hood. I turned the car off when I noticed it was just barely overheating and the radiator seal blew, spraying coolant everywhere. I had the car towed home that night, and let it cool off. I was wondering if i blew the head gasket or not, that why im here asking for advice. I pulled the rad and the coolant spilled out, and there was no oil in the coolant when it came out of the lower rad hose. I plan to put the new radiator in tonight, and run the car. If the car's temp gauge jumps around is that a sign of a bad head gasket with the supras, and should I still pressure test the cooling system. I know about water coming out of the exhaust, the milky oil cap and dipstick, is it a project to replace the head gasket difficult and should I attemp it. I called around its 12 1/2 hrs worth of labor at a shop. I might pay someone if I get the right price.

You could be overheating because you have air in the system.
Try burping your system and keep an eye on it.
If you oh it enough it could weaken and eventually blow the hg.
Try burping it first. And hope that helps.

Although this may not help since you haven't mentioned the waterfall noise.

I think I got the temp problem solved by adding a stop leak to the coolant, and it seemed to fix the problem. I dont smell coolant in the exhaust, dont see oil in the coolant, and the oil level stays the same. I do notice a milky oil cap though, but the oil level stays the same. Im going to change the oil, and add zmax and lucas to the oil to protect the internals. I also did a tune up and noticed that the 5 cylinder spark plug was coverd in oil, is that a valve cover gasket leak internally, and if not what could that be. I didnt pressure test the cooland system to see if the head gasket is bad. The turbo spoils, but the car does stumble when its near 8 psi. There is no shaft play on the turbo, and the vac at idle is -22 to -24 vac from the motor.

OIl in the galleyway is because of valve cover gaskets not secured.

do not use stop leak... it will only bit you in the ass down the line

Yep.
I agree.
Much larger problem when that crap breaks loose.
And the coolant will breake it loose.

Generally you put stop leak in a rad with the intention of running distilled water.

agreed

good luck, and the only real hard thing with doing head gaskets is purely doing it for the first time, you learn tricks as you do them, which way is faster/more efficient and what you actually need to remove instead of removing everything lol

Normally i unplug wiring harness from ecu, poke through the hole, undo water lines, knock sensors, fuel lines, earth strap and all that silly stock crap on top like 3000 pipe, the coil cover etc, unbolt head bolts and lift whole head off with manifolds (get someone to help you, it does weigh some lol)