Checking the cooling system (Mazda Capella GC)

The car engine is operated in various climatic conditions and under various loads. The temperature of the coolant, and therefore the engine, must be regulated and remain within a narrow temperature range. This is provided by the engine cooling system.

As a result of combustion of the fuel-air mixture in the engine cylinders, not only torque is generated, which sets the car in motion, but also a large amount of released heat. Coolant, driven by a water pump, constantly circulates through the engine jacket.

A malfunctioning cooling system usually results in engine damage. If the vehicle is equipped with an automatic transmission, the cooling system ensures the normal functioning and long-term operation of the transmission.

The cooling system must be checked on a cold engine.

Remove the radiator cap and rinse its internal and external surfaces with clean water. Clean the radiator filler neck. All traces of corrosion must be removed.

Check the upper and lower radiator hoses, as well as the smaller diameter heater hoses. Replace hoses with cracks, breaks or signs of aging. Cracks are easier to detect if you pinch the hose. Pay special attention to the clamps that secure the hoses to the cooling system components. Overtightening the hose clamps may cause the hose to rupture or puncture, resulting in leaks in the cooling system.

Make sure all hose connections are securely tightened. A cooling system leak will usually show up as white or rust colored deposits in areas surrounding the leak.

For removing insects, leaves, etc. use compressed air or a soft brush on the front of the radiator or air conditioner condenser. Be careful not to damage the thin cooling fins or cut yourself on them.

Finally, check the cap and the pressure in the cooling system. If you suspect that the valve in the cap is faulty and there is no way to check it, the easiest way is to replace the cap, which is inexpensive.