You will need
  • sealant;
  • - refrigerant.
Malfunction of the gauge of temperature of a cooling liquid entails a lot of problems with driveability when the engine is cold, exhaust, as well as greatly increase fuel consumption and worsen the composition of exhaust gases.
Most often, the sensor is replaced only if it is out of order. However, experts advise that it is best to change the sensor in advance, for example, when the replacement or repair of the engine, since the sensors of the cooling liquid tend to wear out, and their readings become inaccurate.
Sometimes breakage sensor can visually identify is strong corrosion of the clamps, the leakage of liquid or cracking the sensor. But mostly make sure it works by measuring voltage and resistance.
When replacing the sensor from the cooling system drain the coolant. You will not need to drain the radiator, open the drain valve and drain that amount of fluidthat its level was below the sensor.
Also check the condition and most of the cooling fluid. If it was used more than three years (for typical cooling fluids) or more than five years (for long-lasting fluid), then replace it. Be it the replacement of and with obvious signs of contamination.
To prevent leakage the threads of the sensor pre-coat sealant.
Unscrew the old sensor and put in a new one. To avoid damage of the device well it is secure.
After you have installed the sensor temperature of the cooling fluid, refill the system with refrigerant.
Check the cooling system in the absence of air which is in contact with the thermostat can cause engine overheating and, thereby, change the sensor.