I just found out that I need a new radiator, a piece broke off the one that is in my TC. I tried to super glue it back on but it didn't work, any suggestions I don't want to have to go to the Dealer for this.
Called on the part here, 102.19 my cost (I work for a shop)
Expect to pay around 125-130 for it.
Well, that should at least get you by for a while.
It looks like you have, but if you have not I'd put some black RTV all around it as well.
And clean that engine already!
The most the pressure will get to is ~16psi, upon which the overflow tank cap will vent to relieve system pressure. There isn't much flow through there, either.
My Marquis has the same setup as yours (91-97), I honestly don't think I've ever seen coolant go back to the overflow through that tube lol
So I wouldn't be TOO worried, but replacement in the near future would be a good idea.