What Happens When A Car Thermostat Goes Bad?

What does cause the Car thermostat fails？

Whether the thermostat is working properly is directly related to how well the engine is spinning. A thermostat failure is when the thermostat cannot be opened, the opening valve is not high enough, or it does not fully open. The impact on the engine after the thermostat fails is objective, but there are also car owners who do not necessarily need to replace the thermostat after it is damaged. It is equally wrong to think that there is no effect on the engine. The following is an analysis of the causes of thermostat damage.

The diesel engine thermostat is installed at the inlet of the radiator or at the outlet of the cylinder head. The internal structure of the thermostat is solid paraffin, and some vehicles use electronic thermostats, and the internal valves are precisely adjusted by electronic components. The mechanically adjusted thermostat has the temperature at which the valve starts to open and the temperature at which it is fully open, but the electronic thermostat can adjust the valve according to the temperature, so the higher the temperature, the larger the valve will be. The thermostat includes double valves and single valves according to the number of valves, but the uppermost valve is called the main valve, and if it is a double valve structure, the lower valve is basically called the auxiliary valve. The key for the thermostat to adjust the engine cooling system is to switch the main valve and close the water outlet channel. When the engine water temperature rises and the main valve opens, the antifreeze in the engine water jacket flows to the water inlet of the radiator. For example, the thermostat of a typical jet engine is analyzed. When the cooling temperature reaches 82 degrees, the main valve of the thermostat is opened and the valve of the bypass channel is gradually closed at the same time. When the engine water temperature reaches 95 degrees, the main valve of the thermostat is fully opened, and the valve of the bypass passage is fully closed. At this time, the inside of the engine performs a large cycle, and if the engine temperature is lower than 82 degrees, the engine performs a small cycle when the main valve is closed and the bypass valve is opened.

The following are the main form of the thermostat failure problem: The thermostat will not open, and the first reason is an internal blockage. From the structural diagram of the thermostat, the key to opening the main valve of the thermostat is to use the internal push rod to press the main valve open the main valve. If this push rod is damaged the thermostat will not open. The second cause is a cracked thermostat case, a leak of paraffin objects inside, or a poor seal due to an aging thermostat. The only thing that happens in these two cases is the replacement of the thermostat, it cannot be repaired.

What Are The Signs Of A Failing Thermostat?

The symptoms of car thermostat damage are 1. The engine coolant has reached the set temperature, but when the engine fan is to be started, the electronic fan does not work. 2. The engine coolant does not reach the set temperature, and there is no need to start the electronic fan. The electronic fan will also be turned on and will work until the battery is exhausted. 3. In case of overheating, coolant leakage can be observed. 4. Heater Problems: A very hard to spot a problem that can definitely be found during the winter months. If the thermostat is stuck open, no matter how high you turn the heater on, it won't let hot air flow through the vent. This indicates a poorly functioning thermostat and should prompt you to replace it as soon as possible.