[:@]After the problems with my Idler Pulley (I replaced), I started getting problems with the truck overheating, well unfortunately I had one the money for one part, the idler pulley, or a thermostat, so I bought an idler pulley awaiting my check to come in to buy the thermostat. Anyways I took ok the thermostat with thought that the truck would run fine. As I drove around I noticed that the needle would sky rocket after about 5-7 minutes of the truck being on, and I thought it was overheating, then when I checked the truck it was fine. Todayit did the same thing, accept this time I ignored it, thinking that the needle or sensor for the needle was bad, well the truck actually overheated. So I'm wondering if the trucks water pump is bad, or if its the radiator, or what it is? If someone could help me, I'd appreciate it, and your thoughts just may save me some money!!!!! Thanks~

Tj

 

Air in the coolant system. You can purge the air, usually there are bleeders near the TStat housing or along the top hose. Or your TStat could be bad as well. But the bleeding is free.

 

Well I changed out the coolant, and coulda sworn that I got the air out properly, by adding the coolant, starting the truck and leaving the cap off, the after allowing the coolant to go through the system, then re-applying the cap. Did I do something wrong? And if so what's the most proper way to get all of the air out of the system step-by-step. I'm not trying to play stupid, nor am I, just a simple question, looking for a little help that's all. Please and Thanks!

TJ

 

yeah when i do anything with the cooling system i'll fill up the radiator as full as it will go, leave the cap off and then start the truck and keep adding fluid as it goes down (try to keep it filled to the top to apply more pressure and force air out of the system) and then put the cap on once the fluid level quits goin down and you should be golden

 

There is also a bleeder screw for purging the air , follow the water inlet hose to where it connects
to the block , there is a screw , you loosen it slowly until just coolant comes out and no air.

I had the same problems you are describing , i tried the thermostat , it eneded up being a
bad radiator , the dealership wanted $600.00 for the reapirs.