no heatI replace the t stat with one from ford they tell me is 192 or 195 deg stat, the clutch fan is new and does disengage, I also check the water pump its ok. as I said the thermostat housing does not get above 75 deg / 182 deg. Thank's for your feed back. James

1997 ford f150 4.6ltr motor 250,000km New radiator and heater core less than one year, Engine will not get to operating temp. We have changed the rad cap , thermostat ( ford part ) back filled through the heater hose, The highest temp recorded at thermostat housing is 72 deg celcus or 176...