2000 Explorer Cooling problem?

I had a friend who's GM blew the engine because of a radiator problem. Even though it was flushed as part of the warrantee maintenance the radiator still caused the problem. They had to rebuild the engine and replace the radiator.

In the old days they would be recored if rodding (jamming flatrods through the cores to clear out the gunk) didn't work

Sometimes just plain flushing won't fix the problem -- replace the radiator.

which engine do you have??????????? if it is the 4.0 push rod motor then you may have a cracked head or two. I dont know how you checked for water in the oil but the best way is to take off the oil fill cap and turn the cap over and see if there is any condensation in it. If not then you probably have a clogged radiator. With aluminum radiators flushing them out doent always work. You can check your radiator by warming up your engine and touch the outside of the radiator at the top and the bottom. If there is significant temp change then your radiator is clogged. Then best thing to do is replace the radiator. They are pretty inexpensive at places like 1-800-RADIATOR. there is another place like that just look in the yellow pages. They have good prices and deliver to your house the same day. There are other checks to perform, if the vehicle overheats only when driving in town then your problem usually is the fan clutch. If it only overheats on the freeway, going normal freeway speeds then it usually is the radiator.

Flush out the radiator.