How to drain the coolant?

In view of the fact that in the course of a long operation (or long run) of a car, the coolant contained in it (antifreeze, antifreeze) loses its performance, scale buildup occurs in the cooling system and there is a need to replace water. How to drain the coolant and pour into the system a new one, and will be discussed further. After all, if you do not drain the liquid in time, there may be corrosion of the engine pump blades, overheating, etc., up to more serious damage.

Coolant replacement methods

  • To drain the coolant you will need:
    • key "on 13";
    • a container (any basin will do) under the liquid to be drained;
    • coolant itself.
  • Taking into account the extent to which the system is contaminated, two methods are used to replace the coolant:
    • replacement without flushing;
    • replacement with flushing circuits.
  • In addition to the above, a garden hose must also be prepared for replacement of the flushing system. At the bottom of the radiator position the drain pipe.If you did not have it, then disconnect the lower hose yourself.
  • Note: with any method of draining the coolant, the engine must first cool down completely. After that, you can open the expansion tank nozzle. This must be done due to the fact that the pressure in the system is higher than in the environment (this is the reason for the increase in the boiling point of the liquid), and if we ignore the data, then you can take a shower of boiling water that will hit the face.
  • Now proceed to twisting the cap of the cooling system tank and relieve excess pressure. After equalizing the pressure, you can unscrew the cap to the end.
  • Remove the lower radiator hose, or, if there is a drain valve, open it and allow the fluid to drain into the container.
  • After draining the fluid, place the hose in the expansion pipe and turn on the water under pressure. This should continue until clean water begins to flow out of the outlet. Then close the nozzle, fill the system with clean water, twist the expansion tank cap and start the engine.
  • The performed operation will allow flushing the small circuit in the cooling system: the thermostat will work and pure water will circulate in the small circle.
  • After waiting for the fan to start, turn off the engine, and then let it cool again. Again drain the dirty water (how to drain the coolant, it is written above). Flush the system again using a hose, close the drain hole, unscrew the air outlet plugs and begin to pour (slowly) the new coolant.
  • When you notice that water has started to flow out of the air outlets, tighten them with plugs, wipe off the spilled liquid and continue to fill the water to the operating level marked in the expansion tank.
  • When pouring the coolant, you need to turn on the stove with all the power (not to be confused with the blower) so that the fluid level does not fall when the heater is turned on.
  • Screw on the expansion tank cap and warm up the engine so that the fan starts working. Stop the engine, check the fluid level and, if necessary, add the coolant to the desired level.