How to Replace a Thermostat in an Auto

You might notice some time that your temperature gauge is either higher or lower than normal or perhaps you don’t have enough heat in your car when it’s called out. One of the possible culprits of this type of problem could be the thermostat. Uh, so today what we’re going to do is going to go over kind of the typical procedure that’s gone through and changing out and automobiles thermostat, not all vehicles are the same. Um, and the degree of difficulty in changing her therapist at does vary widely. The first step that we’re going to take is we’re actually going to check and make sure that the, uh, engine isn’t too hot to do anything with. So I’ll kind of squeeze and feel the temperature of the upper radiator hose. Um, and we’ll do this prior to, um, removing the radiator cap.

The reason that I, I’m showing caution and doing this is, is basically, um, eh, the pressure in a, in a cooling system holds back the cooler from boiling. And if you’re not careful when you take that off, it’s entirely possible that you could be seriously burned, um, when that would occur. The next step is going to be too, uh, loosen the radiator drain so we can drain out the coolant. Now that we’ve trained to call it. Uh, we’ll actually get at changing the thermostat itself. Um, the first thing that we’re going to do a, I’ve actually previously removed things out of the way of the thermostat housing. Uh, trust me, this type of job varies widely depending on um, what type of vehicle it is. A what we’re going to start by loosening the hose clamp and removing the upper radiator hose.

Set that aside and now I’ll see if I can remove the thermostat itself and there’s the old thermostat. Now that the gasket surfaces are clean, we’ll actually start reinstalling the new thermostat and put it in its place. Uh, be careful and make sure that you put the new thermostat and the same way the old one came out. Uh, if you put one in upside down, the likelihood is that the vehicle will overheat. The new gasket, in this case, comes with an adhesive backing. So I’ll remove that and then put your thermostat into place. Re-Install the thermostat housing into place. Insert the fasteners, then we’ll reinstall the upper radiator hose onto the housing and tighten the clamp.

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