That`s good you are back up and running. next time you drop some coolant and distilled water, pour 1/2 of the go-5 in another gallon jug. then fill both jugs with the water. now you have your 50/50 mix, and no guess work for the shop.
Adding a gallon of water? the shop wasn`t doing their job, might have to add a little. sounds like the mechanic dumped in the coolant and forgot the water.
I guessed right on the freeze plug
, now if I could just pick the right Lottery #`s
.
Charlie