The coolant temperature sensor is most often located in the intake manifold near the thermostat housing, less often in the cylinder head. It is installed in such a way that the handpiece can come into contact with the coolant. Only in this case his signal will be correct. If the coolant level is low, the sensor reading may be incorrect.
It is necessary
- - sealant;
- - refrigerant.
Instructions
Step 1
A malfunction of the coolant temperature sensor entails many problems with the car's handling with a cold engine, exhaust, and will also greatly increase gasoline consumption and worsen the composition of the exhaust gases.
Step 2
Most often, the sensor is replaced only if it fails. However, experts advise that it is best to change the sensor in advance, for example, when replacing or repairing the engine itself. coolant sensors tend to wear out and become inaccurate.
Step 3
Sometimes sensor breakage can be identified visually - it is severe corrosion of the clips, fluid leakage or cracks on the sensor itself. But basically, you can check its performance by measuring voltage and resistance.
Step 4
When replacing the sensor, drain the coolant from the cooling system. It is not necessary to completely drain the radiator, open the drain valve and drain off enough liquid so that its level is below the sensor.
Step 5
Also check the condition of the coolant itself. If it has been used for more than three years (for conventional coolant), or more than five years (for durable fluid), replace it. It must be replaced even if there are obvious signs of contamination.
Step 6
Pre-seal the sensor thread with sealant to prevent leakage.
Step 7
Unscrew the old sensor and replace with a new one. Fasten the device well to avoid damage.
Step 8
After you have installed the coolant temperature sensor, refill the system with refrigerant.
Step 9
Check the cooling system for the absence of air in it, which, if it enters the thermostat, can cause the engine to overheat, and, thereby, change the sensor readings.
