hi I have a 2004 Ford Mustang! I bought it just under a year ago with 126xxx km and was a rebuilt status. First few months I had it throw me a code saying that my car wasn't up to operating temperature ! I asked a friend said will be fine as long as isn't over heating. Then beginning of winter going to park it got stuck in snow and it started to get hot there was ice in my cooling fan which caused fuze to blow!! Then one day about a month ago I stopped at the store left car running with ac on when I came out my friend said he saw steam. So I checked under hood and it was boiling over, had problems doing city driving would start to get hot almost over heat, but on highway it would drop down. So I replaced thermostat and temperature sensor on my car , filled it back up burped the system, started it up , let it get up to normal ideling , and the fan would kick in when gets to hot!! Then I took it for a drive about a 6 km drive round trip . Got home stop the car left it ideling it stayed at normal, then started to creep up a little bit then I heard a whistle and started spitting it back at me!! My oil seems to be ok, and when I drained it. It looked rusty, I'm pretty confident it's not a head gasket from reasearch I did, but could be wrong ! If anyone can help me out with this that would be great, thanks