Your Ford F-150 4.2L engine’s thermostat is the gateway between the radiator and your engine. When it is closed, it stops coolant from traveling through the 2 parts, and when it opens, recent coolant runs from the radiator to the engine and so on. If the thermostat starts going out, you threat overheating your engine and presumably damaging it past repair. Changing the thermostat ought to take a couple of half hour.
Ford F-150 Thermostat Installation Instructions
1. Allow the engine to cool completely earlier than you work on the cooling system. If the coolant is hot, you possibly can seriously burn yourself.
2. Place the drain pan underneath the front of the engine and unbolt the thermostat housing from the engine using the 3/eight-inch ratchet and socket. There’s a hose operating from the top of the radiator to the entrance of the engine, and this is the thermostat housing. Enable any extra coolant to empty into the pan.
3. Take away the thermostat and thermostat gasket from the engine. Clean the mounting floor of the engine and the thermostat housing utilizing the gasket scraper.
4. Insert the substitute thermostat and alternative thermostat gasket within the stock location and safe the thermostat housing to the engine utilizing the three/eight-inch ratchet and socket. Open the radiator cap with your hands and prime off the radiator with the pre-diluted coolant.
