sugarglider1111

Hi - I have a Toyota RV - 1986 with 58k miles on it. The RV was sitting for 5 years before I (stupidly??) bought it. Before my first trip, I had all the fluids changed out and brakes checked, etc. On my first trip, the alternator belt completely broke - there was no safe shoulder, so I drove it to safety, but alas, it blew the head gasket. I got it fixed, but now am on my 2nd trip, and was doing fine, but after stopping to get gas, as I was driving out, I noticed a distinct lack of power. I was able to get it up to speed (chalked it up to bad gas??) and drove several miles. I decided to stop at an auto parts store - good thing I did. As I stopped, I noticed steam coming from the hood, and then I noticed coolant leaking (quite a bit). I have called a mobile mechanic and he is coming to check on it tomorrow. Can you all give me an idea what the problem may be? When the head gasket blew, the following things were also done - replaced cylinder head, head gasket, head bolts, thermostat and gasket, water pump, spark plugs, coolant, motor oil, oil filter. Thanks so much!! Sue