That sucks. It will be completelay rebuilt by the time you are done, some things more than once... I’ll try to send some positive karma.
JB Weld is some serious stuff! But we're gonna keep it in the drawer on this one. I have confidence this might maybe work.Is there a shortage of JB Weld?? All kidding aside, best of luck with the weld!!
If I run the engine, all the coolant will enter out the crack and contaminate everything. It was a mess trying to blow out all the coolant from the cylinder head. I might just lightly torch the area before brazing. Removed all the fuel lines and injectors so no worry's there.You are doing it right,..research, experiment / test.. at least it will leak less. Are you going to run the engine to get it hot?
Good luck. Johan