Changed the tstat on my truck, drained more coolant than I wanted, now time to refill. I added as much as I could through the tank, but I know there is a lot of air in the system, and the radiator does not have coolant in the top hose. Or at least it doesnt feel like it does. Ive looked for vids on youtube, couldnt find any for my year truck with no radiator cap. Can anyone give me some tips on this? Proper procedure? link to a video? THANKS!!