When it is doing this check the upper radiator hose and see if it is very hard. If it is you may have a blown head gasket and combustion gases going into the cooling system. Along with combustion gases comes compression which will cause the hoses to get hard. A blown head gasket will also cause the gauge to show overheating. There is also a chemical test that can be done that will check to see if there are any combustion gases in the cooling system. Let me know.
yes it is very hard. what is the average cost to replace the head gasket? How would I figure out wich side is blown? or should I just do both sides? how long can I drive it before major damage? I am a plumber and own my business this is my only truck. I'm out of service.
ok I got no reply back. So I'm rate this as bad service
repalced the water pump today. still same over heating