![]() The spindle movement is moved toward the switch & causes ON & OFF action based on the set point of the switch. So the increase in the temperature sensing bulb will compress the bellows & moves the spindle up until the force of spring as well as the pressure of bellows are in equilibrium. Once temperature increases, the pressure within the bellows increases. ConstructionĪs shown in the above diagram, the fluid within the temperature sensing bulb responds to variations in temperature. The construction diagram of the temperature switch is shown below. You can pick up BlueDevil Engine Cool at one of your local auto parts stores like:Įngine_coolant_temperature.The different components used in this switch mainly include switch case, range nut, range spring, main spindle, bollows, capillary, and temperature sensing bulb. If you’re sure your cooling system is working correctly, try adding BlueDevil Engine Cool to reduce your engine temperature up to 25 degrees! If it seems like your vehicle is running too warm, make sure your cooling system is working at peak efficiency by performing regular coolant flushes, checking for leaks and making sure your radiator isn’t damaged or clogged with debris. Ensuring your engine cooling fans are working properly is important to keep your car cool but usually doesn’t tell you much about your engine’s normal operating temperature so consider keeping your vehicle driving over 35 MPH when determining what temperature your vehicle operates at. Engine cooling fans may engage at one speed or multiple speeds and may kick on anywhere between 180 and 220 degrees. If you are driving slowly or stopped idling the fans keep enough air moving through your radiator to keep your engine cool. This will likely be somewhere in the 160 to 190 degree range based on what your drive.Īnother thing to consider when watching your engine coolant temperature is what the engine cooling fans are set to. If you call your local auto parts store, like one of our partners below, they will be able to tell you what temperature your engine’s thermostat is designed to start opening. The best place to start in comparing your vehicle’s normal engine coolant temperature to see if it’s correct is with your thermostat setting. If you have an OBDII scanner, you may even be able to graph coolant temperatures in your app and track them that way. Now that you know what your car’s engine coolant temperature actually is, watch it for a few days in a variety of driving situations. One of our favorites is made by Foseal and can be linked with an app on your phone like Torque which will allow you to see the value of various sensors in your car’s engine. Get a device to plug into that port to read the coolant temperature. If your car is older than 1996 it will have an OBDII port.If your car was built before 1996, install a mechanical coolant temperature gauge made by a reputable company.One vehicle we test drove did have a temperature gauge closer inspection the gauge stayed centered even though the vehicle’s actual coolant temperature ranged from 140 degrees up to 230 degrees! So how can you be sure of your engine coolant temperature? Even your owner’s manual probably doesn’t tell you what temperature those lights turn on and off at. Before we get into what normal engine coolant temperatures are, a better question you maybe should ask is what temperature is your engine really running at?ĭoes your car have a temperature gauge? Can you really trust it? Many cars being sold today simply have a blue thermometer dash light that turns off once your car is warmed up and a red thermometer dash light that turns on if your car gets too hot. Normal engine coolant temperature depends on a lot of factors.
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