overheats off and on mostly on now? I have had to put in new fuel pump, thermostat-twice, water pump, intake manifold gasket, I have to keep it half full of gas to run, now I have to put water in every couple miles one day and heater wont work then the next day heater works and it will be good for 20 miles, when it over heats I hear a clicking noise coming from driver side lower radiator hose that goes to thermostat and no pressure in hose. can I run it without a thermostat or what could it be? it seems to be leaking out overflow hose and not getting to motor I just noticed left bottom bolt on head rusty and looks like water is leaking out of it. , no water in oil or oil in coolant, anymore . we have spent so much money and time I cant afford much more and I still owe $3000. Does anyone have ANY suggestions ? PLEASE!!!