There is almost never a situation where you would need to take the radiator cap off of the radiator to add coolant. The exception to that would be when you would have reason to believe that the hose going from the reservoir to the radiator is clogged.
While not having enough coolant may make your engine run hotter, it can also cause your Explorer to not be able to create enough heat. You can verify this by checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top usually right by the radiator cap.
Some vehicles only have full hot. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up. Sometimes when a thermostat goes bad, it stays stuck open. This allows the coolant to continuously enter the engine.
If your Explorer has a built in temperature gauge, take a look at it and see if it is in the spot it is normally in after a bit of driving. The heater core itself can go bad. Over time, they are known to clog and fail. Without the warm coolant going through it, there can be no heat. A bad heater core can also leak, so watch out for that.
There are two hoses coming to and from the heater core. They both should feel warm or hot to the touch with the engine on. If one of the hoses is hot, and the other one is cold, that is a pretty good indication that the heater core is clogged. If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure. Seat the new thermostat inside the housing in the same position as the old one, spring-side facing into the engine.
Install new gasket over the thermostat. Reattach the thermostat housing cover and the radiator hose. Reinstall the air cleaner duct if removed earlier. Fill the radiator with reserve or new coolant. Start your Explorer and run with the heater blowing until the engine gets warm. Check for leaks. Do not attempt to drain the coolant from your Explorer if the engine is hot.
Make sure the engine is cool before draining coolant. This article was written by a professional writer, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more, see our about us page: link below. Items you will need Container Screwdriver 10mm wrench or socket Thermostat and gasket.
Warnings Do not attempt to drain the coolant from your Explorer if the engine is hot. Writer Bio This article was written by a professional writer, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
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