I have a 1990 toyota supra. automatic, red, targa, 7mge absolutely stock no mods. It decided to blow the head gasket three weeks ago...milky oil..ahh supra's what can i say. Anywho, i have taken the head off, cleaned and leveled it and everything was fine. Next cleaned off the deck of the block. straight as could be...only 65,000 miles on this engine and im second owner now. Well long story short...i replaced it with a felpro head gasket from autozone, stock one. Ran great for a few days, then started boiling when i would turn it off out of the resevior. The coolant temp would always stay perfect in the middle and never overheat...heater would work great also. Two more days of little driving i do and viola overheats like no tomorrow...no more coolant in readiator...but also no leaks and also none in the oil...hmm. Now i hear what appears to sound like rod knock, oil pressure is great...still gets up pretty good but between 2000-3000 i hear rods. checked everything else on engine to see if anything was possibly loose and nothing came up. now it appears i have another blow head gasket as well...Do you think the head cylinder is actually bad, i blew the engine and time for new one, overheating issues after replaced new gasket...? What could it be, i would love to drive my vehicle again some time soon...thanks, bill. Your help is well appreciated.:icon_bigg
Little help if you could...
- Thread starter spidy005
- Start date
OK, first, the overheating issue could have been caused by your new headgasket not sealing, or you may have had a large air bubble in the system. Here's a doc in the FAQ to help with that in the future:
http://www.supramania.com/forums/showthread.php?t=590&highlight=burp
However, what you describe sounds like classic rod knock after a headgasket change. Here is a writeup on rodknock in general, but at the end I address what I think is likely your particular issue (Scroll down to "Commentary on rod knock after a HG swap"):
http://www.supramania.com/forums/showthread.php?t=20486
Read that stuff over.
Regarless, it's likely a moot point now and you'll have to pull the motor and start inspecting for damage.
http://www.supramania.com/forums/showthread.php?t=590&highlight=burp
However, what you describe sounds like classic rod knock after a headgasket change. Here is a writeup on rodknock in general, but at the end I address what I think is likely your particular issue (Scroll down to "Commentary on rod knock after a HG swap"):
http://www.supramania.com/forums/showthread.php?t=20486
Read that stuff over.
Regarless, it's likely a moot point now and you'll have to pull the motor and start inspecting for damage.
What about after the head has been removed and you have used water based chemicals to clean the deck of the block. Will this effect the lower internals?
JustAnotherVictim
Supramania Contributor
Does it just seep into this space? This is the first I have heard of this causing rod knock out of all that I have heard causes it.
I think it's safe to apply murphey's law here. If it can go wrong it will.
Maybe I just need to call a bloody salvage yard and have them come and get this thing before i spend another dime on it. LOL thanks for the edit job.
Anyone want to buy a rebuilt and machined na head from a 91? I get discouraged reading on here about all of the ways that toyota screwed the lot of us.
I think it's safe to apply murphey's law here. If it can go wrong it will.
Maybe I just need to call a bloody salvage yard and have them come and get this thing before i spend another dime on it. LOL thanks for the edit job.
Anyone want to buy a rebuilt and machined na head from a 91? I get discouraged reading on here about all of the ways that toyota screwed the lot of us.
JustAnotherVictim
Supramania Contributor
What usually happens is the water seeps past the rings into the crankcase. Since water is thinner than oil the rings can't stop it as well.
The water interferes with the layer of oil that's in between the bearing and the crank and eats up the bearings.
Usually what I would do is leave the oil in until I finished the gasket job then drain it. Refill run until it's warm then drain and refill again.
I haven't had a rod knock yet and I had a really bad hg failure twice. Both n/a's.
It's always a better idea to rebuild, but you can get away with certain things if you do them right.
Edit: Oh and SC has a nice link about rod knock in his sig.
The water interferes with the layer of oil that's in between the bearing and the crank and eats up the bearings.
Usually what I would do is leave the oil in until I finished the gasket job then drain it. Refill run until it's warm then drain and refill again.
I haven't had a rod knock yet and I had a really bad hg failure twice. Both n/a's.
It's always a better idea to rebuild, but you can get away with certain things if you do them right.
Edit: Oh and SC has a nice link about rod knock in his sig.
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supramacist said:
Whoa! Whoa! Whoa!
You stop listening to idiots right now.
There is one real flaw in this car, and it's the headgasket torque spec. That's really the only one. It's well documented on how to repair it, and prevent it in the future.
You don't make 733 RWHP on on a 3.0 liter six cylinder that is fatally flawed in it's design.
Will Neely did it in 2000. Eric Varah made 622 around the same time. And back then we didn't know half of what we do today.
These cars are incredible. And you aren't going to find a better bang for the buck out there, bar none.
I've owned the following:
- 1990 Turbo White Hardtop (bought new from Toyota in late 1989)
- 1992 Turbo Red Hardtop
- 1990 Turbo White Hardtop (T-63)
- 1990 Turbo Black Hardtop
- 1990 N/A Black Hardtop
- 1987 Turbo Bronze Targa
- 1987 Turbo White Targa (57 Trim)
- 1995 Turbo Targa Black (T-66)
- 1995 N/A -> TT -> Single Conversion Black Hardtop (T-61)
- 1990 Turbo Grey Targa
- 1995 White Hardtop Drag Car (Borg Warner 90mm - 1,500+ RWHP)
Listen to the people who know what they are doing, and you won't have problems. These cars can be damned near 100% reliable making twice the power they come with stock.
I've said it 101 times on this forum, and I am saying it again:
The problem with the MKIII is, 99 times out of 100, the owner.
You made a mistake, sounds like you got water in the oil. That's not the cars fault. Yea, I know, that sucks, but fix it and move on. You'll never make that mistake again.
Most of the people whining about the car around here made a mistake, either they didn't bother to research, or did stuff "on the cheap" and it bit them in the ass. Then they blame the car. Don't join that club.
Right on..., Thanks for that.
It chaps my ass ba bit because I simply can't afford to do things on the cheap with this auto. Ya I messed up. I wasn't blaming that on the car. Sorry if it sounded so. I have had this auto for a year and only put 3.5k on it before it blew up on me. When I removed the exhaust mani.. There was a quarter inch gap between the head and the block where some one had kinked the coppers in the gasket. The driver side was bolted down just fine but the passenger was screwed. You couldn't see it from the front because it was tight onto the kinked gasket.
It chaps my ass ba bit because I simply can't afford to do things on the cheap with this auto. Ya I messed up. I wasn't blaming that on the car. Sorry if it sounded so. I have had this auto for a year and only put 3.5k on it before it blew up on me. When I removed the exhaust mani.. There was a quarter inch gap between the head and the block where some one had kinked the coppers in the gasket. The driver side was bolted down just fine but the passenger was screwed. You couldn't see it from the front because it was tight onto the kinked gasket.
Thanks for your help gentlemen...I appreciate it. I'm sourcing a new engine right now for my supra. Thinking about just swapping to a 7m-gte with computer harness, tranny, the works...might as well my wife loves this car and she enjoys driving it. Anyone know where i can get a good re-manned engine from in the chicago area..? Thanks again, Bill.
Jasper engines. will build the engine you send them as a core.
Check out there website. I haven't been on it in a while. They will ship an engine to the closest rep, or garage and do the install. Unless you want it shipped to your house.
Check out there website. I haven't been on it in a while. They will ship an engine to the closest rep, or garage and do the install. Unless you want it shipped to your house.