There was a post a few months ago that linked to a thread about someone who used a coolant additive to help seal the O rings as a temp repair. Does anyone remember who or which this was? Can't find it.

 

something with copper in the name like CCR or something

 

search block weld and see what comes up

 

I really don't like this stuff, but if you use it, make sure you use it 100% correctly and do every step it tells you to do. My brother tried some "Bar's Leak Liquid Copper" in his TII, but didn't fully follow the intructions perfectly. Long story short, when I took apart the motor some of the coolant passages where sealed shut, completely filled solid with metal. But I guess if you use it right, it really does seal things.
Evan