I'm having issues with my 2010 legacy 2.5 limited (275,000 miles) I was hoping for either suggestions or confirmation. To start, I have never replaced the head gaskets and I am sure they have been going bad for several years to some degree. I have taken pretty good care of this vehicle though it has been the victim of a hit and run 2 separate times and the second time it was totaled. Despite the body damage I have happily driven without issue for years since but lately It went from running without any overheating issues to overheating every drive, literally overnight. Unfortunately, since it is totaled I do not intend to put a bunch of money into it so if it ends up being head gaskets I intend to drive it til it stops (hopefully November when I plan to buy a new truck). If something I can do myself I don't mind putting a reasonable amount of work and $ into it.
Symptoms/Beginning of this problem, one day it was overheating a little so I decided to refill and burp the system and within 5 minutes of starting the car with funnel attached it backed up enough to overfill the funnel. Ever since that day I can only drive it about 20-25 miles before it backs up all of the coolant into the reservoir and starts puking it out (boiling). Drive any farther and it empty's the whole system out through the reservoir. I expect this is due to the head gaskets being blown but maybe somebody has had a similar issue and was a water pump or thermostat or something? Other things it has been doing much more recently: it has been sputtering almost like a fuel issue right after starting it until I get going. After driving for a minute it will stop and idle as normal. I check and top off coolant daily before I leave work for home. Yesterday after sitting for about 11 hours at work I popped the hood and the top radiator hose was completely collapsed. Soon as I popped the radiator cap off it went back to normal. I still have not found any coolant in my oil. I have replaced the radiator cap and gone back and forth between the OEM and aftermarket a couple times.
Again, I am really hoping it is something other than the head gaskets but I don't want to just start throwing money at a totaled car hoping to fix the problem by accident. Also afraid to go through all the work to do the head gaskets only to find out the heads are warped or something requiring even more money and work.