I just installed a new aluminum radiator, new weber 32/36 carb, and a new water pump. The motor is getting hot quickly, the oil is clean, radiator is full of 50/50 antifreeze/water. The upper radiator hose is getting hot within a few minutes of run time, although the lower hose is cold. Could the thermostat be bad? Do I have the wrong water pump on it that could be flowing the wrong direction? the upper hose is actually hot to the touch as opposed to being warm which you would expect after only a few minutes of run. Thoughts? Thanks