I have a 99 forester that has 134k. Headgasket has been replaced at 100k.
I have recently replaced radiator , tstat, rad cap, and coolant (subaru green coolant with conditioner). Anyways

there I am driving on the freeway afer thinking replacing the radiator fixed the problem and it started to overheat again. For the last two weeks, every 10 miles or so, I have to fill the radiator wih distilled water because it will puke coolant out of the overflow tank.

If I baby it and accelerate as slow as mechanically possible, it won't overheAt on my four mile journey to work. If I push it a little bit, after a few minutes it will make the temp gauge spike up. So I have to shut it off. It is overheating while driving but way faster if I'm pushing it. Babying it will buy me 10-13 minutes until it gets too hot and I have to wait and put more water in it.

Fans do kick on and turning the heater on full blast only helps a tiny bit. I have properly burped the system after adding coolant.
Anyone have any ideas?

feel upper and lower radiator hoses to see if radiator is plugged and/or tstat is working.

feel upper and lower radiator hoses to see if radiator is plugged and/or tstat is working.
Both hoses get warm after driving, T stat is working. I put the old one in boiling water and that one was working so I am assuming this one is working too since the problem remained the same and didn't get any worse.

Sounds like leaking headgaskets if the coolant is overflowing out of the overflow. When you start the cart and let it idle, do you see bubbles form in the overflow

I just put the rad cap on yesterday and after topping the radiator off twice (very small top offs) I drove the 4 mile drive, let the car sit and when I went to go put more in tonight it was still full. Could this have been the infamous broken F****NG RAD CAP :diaf:

I am taking it in to get the CV boot repaired and that is a 11 mile drive. I will see what happens tomorrow.

If it is spitting out the over flow bottle than your HG is blown again. Check the over flow bottle while it is running. If it is bubbleing the HG is blown.