Leaking Coolant

If you are in a bind and need to get things running, you can get rubber freeze plugs. When I was a kid we would tap the plug edge lip with a hammer and screw driver, turn it sideways and remove with vice grips. Then go to the parts place and get a rubber expandable freeze plug that was slightly smaller (like a 1/16"). When you put it in the hole where the freeze plug was and turn the nub, it expands and stays in. Excellent temp solution which I ran for a long time back then on several freeze plug holes.

I am not sure of how long they will last other than I ran mine for 2 years with zero issues.