Seeing as there are no water channels thru the front cover, that means either a blown-out freeze plug, or a cracked front iron, or something really bizzarre. Could be a symptom, though, instead of a cause.

Freeze plug jammed in the dizzy gear, possibly? Or a cracked iron that led to a seized front bearing?

Won't know til you tear it down.

 

The amount of force involved in a full drivetrain lockup while under speed has got to be insane. I would imagine that if a motor went from cruising down the freeway, to a dead, halting stop, it could be enough to break or crack a housing or iron, which could lead to water in places it shouldnt be.

 

It's a fair lot of force, yes.

A front-thrustplate bolt walking out and blocking the counterbalance would be more than strong enough to do the deed.

But yeh, until it's torn down, it's all just guesswork.

 

this is what an FC engine does when it locks up @ the 8250 rev limiter

http://fc3spro.com/TECH/HOF/K2RD/k2rdhof01.html

 

That had to make an interesting noise...

From the pics, it looks like the rear bearing seized first, which sheared the rear gear bolts, which lost the rotational synch of the rotor to the housing, which shattered the housing, which locked the engine, which sheared the flywheel key...

 

The ankle bone's connected to the, shin bone. The shin bone's connected to the, knee bone. The knee bone's connected to the...........

 

Dash board?

 

I'm going to stab a guess...

Frost plug failure inside the front cover that let a ton of water get into the oil... water and oil then got into the oil passageways and caused you to spin a bearing because of lack of proper lubrication.

Shot in the dark, but damn if that isn't worth a fortune in "Kickass Points" if I'm right lol

Jon

 

Jon you may b on too something. Did a more thorough check today and it appears a majority of the water/steam was from the back side of the water pump. I am leaning toward a slow coolant leak that spun a bearing as well as some of you guys have mentioned. The good news!!! Already have the 12a out of the 83 on the bench with only 20K on a rebuild. Maybe it's time for that long awaited SC project I have been thinking of!!!! Still Tearing down the seized motor as well...curiousity!!

 

I doubt you spun a bearing. More likely the milkshake masqurading as oil caused one or more bearings to sieze, locking the engine. You will probably find a stationary bearing missing teeth and at least one rotor slightly wedged, A broken e-shaft is a possibility too.

 

something like that. huge pain in the *** to pull that apart!

 

More like:
The butterfly effect, as applied to trainwrecks.

 

I laughed in class....everyone looked at me....damn you....

 

Any updates? I'm curious what happened

 

haven't pulled it out yet bear. Still in the rx and won't be pulling it till probably early next week. Most of the time has been spent in stripping my other 12a on the bench, just freed it up today from carbon lock ( loved the ATF trick, worked for me ). Going to be putting up a new post for some advise on the one. The seized motor won't be stripped for at least a week but I will be sure to post some pics and keep everyone updated.

 

pm me for my number if you want/need my help, and i may be able to drag kentetsu along

 

surely will do the that in the near future. Just have not decided what is going to be done with the motor on the bench. I will most likely need help pulling the old motor and trans. Maybe next weekend!!