More details. The top hose is warm and the bottom is cold. Both hoses go rock hard when the car has been running, both soft when cold. The heater blows hot. Both engine oil and tranny oil look fine. Does not overheat on idle from cold with fans running, but once put under load overheats. Radiator leaks where bottom hose enters radiator when cold and when hot. Radiator itself remains cold...is this a thermostat that just won't open ir a more serious problem? Can I just remove the thermostat to check?Any help appreciated.