My truck runs hot I
3 Answers
Hornet_2497 answered 5 years ago
Radiator cooling fans are not coming on. Check fuse, relay, and fan motor itself.
Hornet_2497 answered 5 years ago
I've seen some 4.7 engines with plastic water pump impellors that disintegrated over time. Can happen in other engines using plastic water pump parts. Metal impellors can corrode. I would try to look into the radiator for coolant flow before removing water pump. No flow would mean pump not pumping once the thermostat opens. Make sure the thermostat was installed with coils toward the engine.