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Also one thing ive noticed since ive had this truck even before i changed the tstat is u never see the temp gauge go up and then drop like when the thermostat opens. The temp gauge just goes up between 1/4 and 1/2 up the temp gauge and stays right there. Ive never seen one that didnt get real warm then the stat open up and the temp drop to normal
Part of me thinks i have bad water pump. The truck wont overheat and ive never had to add any coolant but when i did flush the radiator the crap that came out of it was extremely nasty! Im starting to think that some of that junk has gotten into the water pump impeller and its not allowing the coolant to flow as well as it should
Update i changed the radiator cap last night and i now have pressure in my hoses but heat isnt any better. Im starting to lean towards the blend door not shutting all the way to my culprit of not very good heat cause I have no other symptoms of anything else