After about 12 miles the thermostat shoots to the top. I turn the cabin heater on but no hot air comes out. The water hose from the top of the radiator is cool as is the bottom hose from the water pump to the bottom of the radiator. I'm not loosing radiator fluid, no puddles and the reserve tank doesn't seem to be going down. Is this bad radiator, bad water pump or manifold gaskets? Thanks in advance for any help given.
