Coolant coming out of rad cap.
My temp gauge has been moving around quite a bit lately and after a short drive today i noticed that coolant had been leaking out of the rad around the cap. I can see where it has leaked straight down and where the clutch fan has slung some of it around. This just started today, truck isn't overheating. I haven't refilled it or anything, but i did pop of the cap this morning to check the level, could this have caused air to get into the system and now it is blurping it out?..