I need some help figuring out what's wrong with my 2007 Forester XT Manual.
- The headgasket popped in November of last year. I had it fixed by an RMI certified workshop. They skimmed the head, installed a new HG, timing belt, etc. I don't think they did the waterpump.
- Before that, the guy I bought it from had the downpipe decatted and the thermostat replaced (he even gave me the old one).
So on Sunday we were driving around looking for houses on show and suddenly I notice the temp gauge going up to 3/4. I turn on Torque and it shows the temp is at 112 Centigrade (about 12% above boiling point of water, whatever that is in Fahrenheit). I checked the coolant level and while it wasn't full-full, it was enough to keep the car cool (I know because when the HG went, it only overheated when the coolant was almost completely empty). In an attempt to protect the engine, I turned on the heat on full but only cold air came out. I haven't checked for collapsed pipes. I also don't know the state of the heater core. All I can say is that it was working pretty well up until thursday or friday when I last had the heat on. I wasn't driving fast, I was cruising around looking for a house to buy. I didn't notice any bubbles in the coolant like last time, so I don't THINK the HG is leaking into the waterjacket again.
I suspect a bad thermostat or a blockage of some sort, but I have no solid proof yet. Anyone else have something similar?