▷▷ How to drain antifreeze from the radiator

This morning we explained the process necessary to replace antifreeze fluid of our car. However, after replacing the fluid, it is necessary to bleed the circuit to remove the air pockets found inside it.

Bleeding the circuit is an essential task for the proper functioning of the engine.. If it has not been purged, or have done it incorrectly, we can cause serious damage to the engine, what could get overheated.

In many cases, cars have bleeders in the hoses themselves. There may be several hoses with drains. What we will do in this case is start the car and open these bleeders.. At first we will see how bubbles come out, That means there is water inside..

We must leave the drains open until the only thing that comes out of them is antifreeze. Besides, We must monitor the level of antifreeze and fill it if necessary..

If our car does not have bleeders, or we can't find them, We can leave the car on and refill the liquid as necessary for a while.

In both cases it is necessary to keep the car on until the liquid passes through the entire circuit and this happens when the car is hot.

At first the liquid does not pass through the entire circuit. The thermostat is responsible for allowing the passage of antifreeze to the entire circuit.. When the engine is hot, The thermostat opens the way for the rest of the circuit.

It is usually advisable to leave the car on until the electric fan starts and refill antifreeze if necessary. Once the electric fan has started, we can finish the circuit purging process.. At this point we will close the drains or put the expansion bottle cap on..