Did you install a new radiator cap when you replace the bottle???
Maybe the cap opening pressure is bad??? (just a suggestion)
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Question - when I replace the coolant tank, is it a good idea to replace hoses as well as clamps? How about the cap? Thanks!
Plan on the cap too.
There was a post here that a bad cap contributed to the problem for at least one owner. My tank on my 08 is still kicking... but due to that I carry a spare tank and cap... and the rub there is the tank is the old design before they updated it.