Blown headgasket?

[Awyman18]

OK, so i recently bought a 1990 toyota supra turbo. has about 98k miles and ran great, until i was spewing engine coolant, hearing bubbles behind dash, and loss of power. Im pretty confident the hg is blown. This thing is basically bone stock besides a k&n air filter. I plan on tearing it apart and buying a whole gasket kit but i dont kno which one to buy? i dont plan on modding it either, and its stil running stock boost. Help please????

[Green7mgte]

the HG is defective from the factory. too low torque specs.
do you have milky looking oil on your dipstick? do you have oil in your overflow? those are signs of a BHG. tons of info on what to look for in the faq, give it a browse.

The bubbles behind the dash is air in your heater core. The heater core is located behind the dash and is lower then your rad cap. so air will travel through the system and collect in the HC making that waterfall sound you hear. all other issues aside if you jack the front end up and remove the rad cap and let the car warm up for 15 minutes adding fluid it will "burp" your coolant system. also covered in the FAQ (or it should be)
as for your gasket kit. just get the one for the 7mgte.
Good luck man.

http://www.toyota-supra.info/forums/...-symptoms.html

[Awyman18]

hey no theres no milky oil, nothing in the radiator, so i caught it really really early, but idk if i should get the stock hg because ive heard its alot more forgiving? Instead of a metal one

[Green7mgte]

Originally Posted by Awyman18

but idk if i should get the stock hg because ive heard its alot more forgiving? Instead of a metal one

you don't need a metal HG. not unless your planning on running 30# or more of boost. A larger question you should be asking yourself is do I want bolts vs studs.. bolts are fine and thats what ive used. studs are better but not defiantly needed. just remember to torque them above spec.

[Awyman18]

hey and no i plan on keeping it at its 6-7# of boost, but i think im going to get studs, but ive seen like..stone Hg's, and graphite hg's and wondering..like wats the difference, etc etc, wat HG do u have ur supra by chance? and wat should i torque the bolts or studs to depending on wat i get?

[Green7mgte]

cosmetic hg w/ stock bolts torqued to..shit idk 85lbs? i dont recall. studs are what.. 95.. who said 112?

[Awyman18]

ok thanks for the help, i think im going to order some arp studs, and order a ishino head gasket kit for it. I heard ishino made the originals for toyota sooo thought i should go with that

[87hilux7mge]

if you plan on keeping boost stock, the ARP rod bolts are way enough for you. the problem with the studs is you cant just drop the head on and go cuz the nuts dont fit through the bolt holes, stuff gets in the way.

i have studs but i got a stupid good deal. they just take more finesse than the bolts. as for gasket kits, any full kit will work. personally fel-pro has good ones, and their hg's meet or exceed factory specs (definitely wanted) and are quality controlled.

go with the bolts unless you get a good deal, and when you install them, feed them through the head, then thread the nuts almost all the way down, then carefully set the head down, and use an allen key to thread the studs into the block until they are snugged. then tighten the nuts down to spec.

bolts are much easier, and in your case more than enough, just my opinion

[Awyman18]

yea i heard they are lol but we will see, depending on the price..like if its only a $10-$20 difference i might as well get the studs u kno? But ive heard fel-pro is good too, i just need to do some research...ive been so busy and the weather has been so perfect to take that targa top off and go cruising so im pumped to get it fixed. thanks for all the replies!

[Ranma]

I would rather not have "studs" in my Supra

Would it really make a difference for me? My guy has a gentle life and the fastest he goes is on the turnpike, lets call it 75 to 85 mph and I usually shift around 3500 rpm.

Oh should I torque the head bolts? The dealer put the reconditioned head on my guy and have no ideal what they did.