Thanks for the responses. I had a water pump put in along with the timing belt shortly after I bought the truck about 20K ago. The more I read the more I think it must be a clogged radiator, or at least the flow is reduced. I am going to flush it but I have been having a bad time finding the drain plug. THe manual I have shows it (badly) as being somewhere on the passenger side near the front. Very crowed with things in that area. There is something that looks reasonable just in front of the oil filter, a bolt with an allen wrench thing. Could that be it? Help appreciated.