I got a '97 ranger, with about 70,000 miles. I drove it today and after about 20 minutes on the freeway under normal driving conditions (it does get hot tho here in la) I noticed the temp gauge getting real high, it's done this before, it's started doing this a couple months ago, but it never totally overheats. Anyways, today when I reached my destination and pulled over and parked, I noticed that radiator fluid was leaking and I opened the hood and the top of the radiator fluid reservior had popped off and that shit was like BOILING inside the reservior, so I just left my car there with the hood up and went about my business and came back five minutes later and the fluid had settled so I put the top back on and closed the hood and drove back home and the same old shit started happening and I turned on the heater a few times and the temp gauge dropped somewhat and then when I got home, and turned my car off the fucking thing did the same thing, I also noticed sometimes when I open the hood before starting my car that the radiator hose looks all squished together like a straw when you suck all the air out of it. I've taken it to the dealership a few times but those fucks are like, "it's not over heating, there's nothing wrong with it" and I don't know what to do, this thing works fine driving around the city but after like ten minutes on the freeway the temp starts going up and up untill I stop driving. I had them replace the thermostat recently so I don't think that's the problem. Any help is appreciated. Thanks.