Blown head gasket?

h8z2luze · 05-25-2006, 03:35 AM

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 · 05-25-2006, 03:44 AM

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

h8z2luze · 05-25-2006, 04:29 AM

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 · 05-25-2006, 01:43 PM

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 · 05-25-2006, 04:55 PM

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

ddmcse · 05-25-2006, 08:30 PM

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

h8z2luze · 05-26-2006, 03:18 AM

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

j3pz · 05-26-2006, 03:26 AM

hp for a n/a is around 200 i believe. also you may want to retorque the head while you got the valve covers off. mk3 supras are notorious for blown head gaskets. retourqe to about 76 lb/sq in. also dont let the oil get low, these supras get mad when that happens.

h8z2luze · 05-26-2006, 06:19 AM

I think I might have a worse problem. I pulled the dipstick and It had water in the oil. To me this means either blown head gasket or cracked head. I hear these supras are notorious for cracking heads. What do you guys think?

f00g00 · 05-26-2006, 07:34 AM

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.

05-25-2006, 03:35 AM	#1 (permalink)
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 319	Blown head gasket? 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.

05-25-2006, 03:44 AM	#2 (permalink)
dcrusupra Jive Turkey MOD Join Date: Aug 2005 Location: Plantation, Fl. Posts: 1,059	Rebuild kit is much money. But its probably just the valve cover gaskets. Replace those and then go from there. __________________ New Rebuild My CarDomain NEW SITE: MY NEW SUPRA FORUM

05-25-2006, 08:30 PM	#6 (permalink)
ddmcse Super Moderator Join Date: Jun 2005 Location: CT U.S.A. Posts: 921	the screws holding down the valve covers suck big time . look into replacing them when you do the job __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info 12 Years behind the wheel of a Supra

05-26-2006, 03:26 AM	#8 (permalink)
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,068	hp for a n/a is around 200 i believe. also you may want to retorque the head while you got the valve covers off. mk3 supras are notorious for blown head gaskets. retourqe to about 76 lb/sq in. also dont let the oil get low, these supras get mad when that happens. __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

05-26-2006, 07:34 AM	#10 (permalink)
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 291	head gasket 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.

05-25-2006, 04:29 AM	#3 (permalink)
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 319	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?

05-25-2006, 01:43 PM	#4 (permalink)
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	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

05-25-2006, 04:55 PM	#5 (permalink)
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 319	I figured that but I havent figured out how I am going to do that yet. lol. What do you suggest?

05-26-2006, 03:18 AM	#7 (permalink)
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 319	How much is the stock horsepower on these things? How much are the bolts?

05-26-2006, 06:19 AM	#9 (permalink)
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 319	I think I might have a worse problem. I pulled the dipstick and It had water in the oil. To me this means either blown head gasket or cracked head. I hear these supras are notorious for cracking heads. What do you guys think?

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