The large plug on the block that drains the water jackets is very stripped and leaks now. Basically it kind of threads in, but very crooked and the threads on the plug and the block are destroyed. I really don't care if it never comes out again, but I really need to seal it. Does anyone have any suggestions? I tried a couple different gasket makers and neither one did the job. Please help.

 

Which piece are you talking about?

 

It's a threaded plug that goes into the block behind the header. It has a 19 mm hex on it and the opening is like 1.5 inches wide.

 

If the threads are not repairable as you say you can try and remove the plug and apply JB weld to the threads or whatevers left and to the block then LET IT COMPLETELY DRY then re-install the plug, but if the plugs is as damaged as you say there might be a problem re-installing the plug but you should be o.k. Make sure both the plug and the block are completely dry and clean clean clean. Then let it dry dry dry or it will gat into your cooling system and damage everything.
Or you could get a new block or bring yours to a machine shop, but JB weld should work just fine, it avalible at fine automotive parts stores.

 

You mean to apply JB weld to the block and plug, put the plug in, and then wait for it to dry before adding coolant and running the car right?