Why You Should Replace The Thermostat

Why You Should Replace The Thermostat

It is always best practice to replace the thermostat on a vehicle after it has overheated. Sponsored by Auto Value and Bumper to Bumper.

Most thermostats use wax inside a brass chamber that expands when it is heated. When it expands, it pushes on a pin or piston that is connected to the plate and spring.

Movement of the plate allows coolant to flow from the bypass coolant circuit to the circuit that has the radiator. This system has been in operation since the 1950s.

Thermostats can suffer mechanical damage that prevents them from closing and opening. This can include damage to the springs and straps on the body of the thermostat. Also, debris and corrosion can prevent a thermostat from working. Overheating can damage the wax in the thermostat.

This is why it is always a good practice to replace the thermostat on a vehicle after it has overheated.

This video is sponsored by Auto Value and Bumper to Bumper.

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Let's take a trip. It's 1974. You're in Denver, Colorado. You're in your car that has a carburetor, and you're getting ready to go over those rocky mountains to go to California. You've noticed that you're halfway up the mountain, the engine's starting to struggle. You go a little bit further. You notice that you start misfiring and the plugs are fouled. So what's going on here? Well, essentially with this, you have the blue, which represents oxygen, and the red represents fuel, and this is the perfect ratio. But you're taking away this oxygen, and when you take away the oxygen, you should take away the fuel. Carburetor can't do that because it has fixed jets, and the metering stays constant no matter what altitude you're at. This is why certain shops in Colorado specialized in carburetor tuning. Let's fast forward 50 years, and you're in a modern vehicle.

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