Blown head gasket?

[h8z2luze]

Hello, I have a 89 Supra N/T. I got it from an auction. The guy said there was nothing wrong with it but there is. It misses really bad. When I pulled the plug wires off the valley where the plugs screw into the head was full of oil. I have never worked on one of there straight sixes before. What does this mean? I hear it could be a blown head gasket or a craked head. How mush is a rebuld kit for these? Thanks in advance.

[dcrusupra]

Rebuild kit is much money. But its probably just the valve cover gaskets. Replace those and then go from there.

[h8z2luze]

Ok I never thought about that. I ordered some and the grommets. Do I need anything else? Is there a diffrent process with these cars than others?

[rnoswal]

Other than taking the stuff off that is on top of the valve covers, you have to get the oil out of the sparkplug holes before you put new ones in. Otherwise a bunch of stuff goes into the cylinder when you pull the plug. A new set of plug wires and plugs and the valve cover gaskets are all you should really need.


Russ

[h8z2luze]

I figured that but I havent figured out how I am going to do that yet. lol. What do you suggest?

[ddmcse]

the screws holding down the valve covers suck big time . look into replacing them when you do the job

[h8z2luze]

How much is the stock horsepower on these things? How much are the bolts?

[f00g00]

Probably just a head gasket but you won't know till it comes off and gets checked. A good machine shop can check the head for warpage and cracks.
The biggest thing is that it wasn't you driving the car when this happened
so you don't know the situation when the damage occured and how long it was driven like that.
One of my previous engines lost the number 6 piston when the gasket blew
which meant used engine for me.

[h8z2luze]

Ok well my girlfriend actually got it at auction and she drove it back she said it ran great and stuff. Then her son ran into a cement bench with it so they got the crossmember fixed and then it sat. the mechanic said it needed valve cover gaskets. I didnt know her at the time. So I hope thats all it is but then again how could water get in the oil. Unless its got a blown head gasket. What all do I need to replace the head gasket?

[f00g00]

Minimum would be a gasket set for a head job which you can get from toyota
but I'd go a metal gasket for the head scince it has to come off and ARP head bolts scince they can be torqued more than the standard toyo ones, new plugs (iridiums), wires timing belt scince it also has to come off, new hoses for the rad, new heater hoses, check the plug on the back of the block,
if that goes your water goes out in a few seconds and the temp guage probably won't catch it,(no water or steam left to make the guage go up),
clean all your intake manifold parts including the ISV and while the manifold is apart check all the mating surfaces for warpage(TSRM shows you how to do this), clean the injectors, change oil and filter and again within a week cause of the water, flush and clean cooling system, clean the valves and piston tops and probably other stuff that I missed. The gasket set should have every gasket for the upper half of the engine and a water pump gasket. For sure change the injector seals which are also in the kit.
Its complicated and best left to pros who have Supra experience unless your a good mechanic yourself and have the time and the tools.