Engine overheating: reasons of this terrible disaster for the car

Administrator posted this 02 May 2019

Engine overheating is a serious and widespread problem. Every experienced driver faced with it. However, timely response and prevention of the problem can help to avoid serious consequences of overheating of the motor.

Clogged radiator.

When the radiator is clogged the heat transfer process is disrupted. It is necessary to clean the radiator from time to time, especially in summer. In addition to external cleaning, you need to pay attention to the internal system of the radiator and clean the hose pipes. The precipitate in the cooling system is mineral salts. The dense texture of sedimentary salts covers the channels, reduces fluid flow, and disrupts heat transfer. It is also noteworthy that externally there are no signs of overheating. The problem can grow to such a high scale that it will damage the engine walls.

Sometimes the radiator cap may not be sealed, in consequence of the pressure is broken. Together with the increase in pressure, the boiling level of the liquid increases.

Leakage or insufficient amount of antifreeze.

It is necessary to monitor the level and quality of antifreeze or tosol cooling agent. Coolers may leak, so check the engine compartment for whitish stains. Any cooler causes deposits in the radiator system, however, poor-quality liquids have a generally aggressive effect on the car system.

Failure of the thermostat.

Thermostat dysfunction comes from precipitation in the radiator. For example, the mobility of the elastic element of the device is disturbed and temperature measurements cease to be carried out. More generally, the theme of the breakdown of the thermostat considered here.

The failure of the sensor of the cooling blower.

The working offense of this sensor can be caused by the poor-quality antifreeze and sediment deposition. At the bottom of the radiator (where the sensor is located), dirt settles. It disrupts the process of reading temperature data.

Pump (water pump) failure.

Pump failure is not the most common problem, but it happens on cars with high mileage. There are only three reasons: failure (turning) of the plastic impeller, jamming of the pump bearing, leakage of coolant.

Disorders in the settings of the ignition system.

A failure setting in the ignition system (the moment the fuel combustion starts and the inlet valve opens) leads to a sharp increase in temperature.

Exhaust valve burnout.

If there is a crack in the valve, it is activated, before passing high-temperature gases.

Air entering the system.

This is the most common cause of overheating of the motor, which is a consequence of previous factors. Caused by 1) boiling coolant; 2) violation of the pressure in the system; 3) cracks in the cylinder block gasket cylinder head (cracks, fractures, etc.).

Poor quality engine oil.

Poor engine oil will hit all the systems of the car, which will eventually start a chain reaction, until the engine, but will stop working. Remember, the use of low-quality oil is fraught with major breakdowns of the car.

Working conditions, driving style, and other nuances.

Do not forget about the operation of the car. For example, the movement uphill, off-road in the summer, in an overloaded car is all the tougher conditions of the engine. If you do not give the car a rest, (and what is important do not follow the level of coolant and temperature) most likely, the motor will overheat.

There are three stages of engine overheating. Weak (5-10 minutes at high temperature), significant (10-20 minutes) and strong (more than 20 minutes).

At weak engine’s overheat, it doesn't lead to serious consequences. Overheating of the average force is able to deform the cylinder head. A significant overheating can lead to the fact that the piston and connecting rod will break through the side wall of the engine.