Update, Well I was a little too quick to say it was fixed. Dealer told me it would be ready in morning.
Apparently wasnt so easy. .
They tried 4 times to install a new plug each time it leaked.
On the last go they packed it with hightech sealant. tried to pressure test it and the heater hoses were leaking and the Y connector was also cracked. These are notorious issues on this engine. 2 weeks to get heater hoses and parts. Such high demand that they cant keep up with need for them. Even after they replace hoses they aren't sure if they fixed the frost plug issue.
The frost plug had a great deal of corrosion which makes me wonder where else it is badly corroded. If leak not stopped next step is a new cylinder head.
So made only decision I could, got rid of car while it was running.
SO anyone with a 2010 or earlier V6 I feel sorry for you, get rid of it while its running....