ok so i flushed my cooling system but i have a problem it takes really long for the engine to cool down after being shut of so i was wondering if there was a way bleed air from the cooling system i heard that there was a sensor somewhere in the intake where you can remove until coolant starts coming out of it . but not sure where the exact location is if any one can help me find it i would be very thank full and the truck is a 1998 ford f150 4.6l engine