I have a 2000 ford explorer, 6 cylinder, just over 100,000 miles. I will drive it for about 10 minutes and notice the temp gauge going hot, then as soon as it reaches boiling point, it drops back down to normal temp. When I am driving on the highway it runs great. But driving around town doing 25 mph it gets hot, then normal, hot, then normal. When I get home, and the truck has cooled down, I check the radiator level and it is completely empty! I have looked for leaks and found none, the thermostat was changed and it is still running hot. I have tried filling just the overfill tank, and not opening the radiator at all, but still the problem persists. I thought maybe I was letting air fill the radiator, so I started leaving the cap on and filling just the overfill, the problem lessened a little, but I am almost positive that the radiator is completely empty. We have checked the oil, the antifreeze is not going in the oil, nor is it visibly leaking anywhere. So the question is, what is my next step?
Every now and again I notice white smoke coming out the tail. But it's only every now and again...not everytime I add coolant!
Every now and again I notice white smoke coming out the tail. But it's only every now and again...not everytime I add coolant!