The internal combustion engine is soIt is said that the combustion of fuel takes place inside its cylinders. At the same time, a huge amount of thermal energy is released, which, thanks to the crank mechanism, turns into a mechanical mechanism. The temperature thus often exceeds 2000 degrees. No metal, no matter how strong and stable it is, will not last for long. It is to reduce the heat load and provide a normal temperature regime for the engine, and serves as a cooling system. In the event of a malfunction, the vehicle's power unit begins to overheat, resulting in the motor parts expanding, the lubrication boils, the gaskets burn out. The result of such a destructive process can be the failure of the elements of the piston group and the head of the block of cylinders. To prevent such an outcome, it is important to know the possible causes of engine overheating and be ready to immediately eliminate them.
Consider how the power unit behavesVAZ-2114, when its operating temperature exceeds the norm. The cooling system of this car is not much different from that of other cars, except that the simplicity and unreliability of its design. So, when the "fourteenth" motor overheats, he tells about it the following signs:
If, thanks to the above characteristics, you understand that your VAZ-2114 is warming the engine more than normal, follow these steps:
In this situation, it is better to deliver the car toplaces of repair (in the service station or in the garage) by towing, but if this place is located no further than 1-2 km, in extreme cases, you can take risks and drive on their own. Naturally, periodically letting the engine cool down when the pointer of the sensor passes over 90 degrees.
Considering that the cooling system of the "fourteenth"it is quite simple, it is entirely possible to bring it into working order independently. But first, let's look at the main causes of engine overheating. They can be such:
Consider these reasons in more detail.
Do you remember exactly that yesterday the level of refrigerantwas normal, but today in your VAZ-2114 the engine is warming and the expansion tank is empty? Hence, the integrity of the system was broken. And it's good, if only outside the motor. The worst thing in this case is the burning of the cylinder head gasket. This fault is tricky in that the liquid from the channels of the cooling jacket can get inside the cylinders, and also into the oil channels. Because of this, often on the VAZ-2114, the engine is heated and the vehicle is stalling. The work of the motor is accompanied by a syzy exhaust with a characteristic smell. Here it is necessary to remove the cylinder head and wash the lubrication and cooling systems. In the worst case, a major engine overhaul will be required.
More often the cooling liquid leaves the system throughplaces of connections of hoses with nuts of radiators (cooling and an oven), the thermostat, a broad tank, the engine. If the engine is heated in VAZ-2114 and the leak of refrigerant is obvious, first check these places! This problem is solved by tightening the clamps and adding the liquid to the cooling system.
Next, inspect the hoses themselves.Often they simply crack from time, and antifreeze or antifreeze, being under pressure, flow out of the system. A similar fault is eliminated by replacing a hose.
The role of the pump in the cooling system is creationpressure, due to which the refrigerant circulates. Its failure can become not only the reason that the VAZ-2114 is heated by the engine, but also by a malfunction of the drive of the gas-distributing mechanism. The matter is that the liquid pump is actuated through a gear wheel by a timing belt. Therefore, if the pump fails, this immediately affects the operability of the entire drive. In this case, a replacement of the liquid pump and possibly the timing belt is required.
Failure of the fan switchleads to the fact that with a slow ride the radiator does not receive any forced blowing. In other words, the fan simply does not turn on and the liquid does not cool. It is not difficult to check the sensor. For the "fourteenth" with carburetor engines, just turn on the ignition, disconnect the terminals from the sensor located on the radiator, and close them together. If the fan is working, the sensor needs to be replaced. If the VAZ-2114 engine (8-valve injector) is heated, with the ignition on, simply remove the terminals from the coolant temperature sensor located on the cylinder block on the right. The electronic control unit will command the engine to run in emergency mode, and the fan should turn on. If this occurs, replace the sensor.
But there is one more nuance - the fuse.If it burns out, the fan, of course, will not turn on. In the mounting block under the bonnet, locate the fuse F4 or F8. It is indicated by the corresponding symbol - the propeller. Remove it from the socket and check with the tester. If necessary, replace it.
Well, if the fan does not turn on, the problemcan be just in it. Fortunately, it is also easy to verify. Simply connect its terminals directly to the battery terminals. In this case, do not mix the polarity. Earn - look for the problem further. Will not work - the fan is in repair or replacement.
Thermostat VAZ-2114 - the main elementdistribution of coolant flows. It is he who regulates the direction of its movement with a cold engine and with warmed-up. The essence of the thermostat is to switch the flow of refrigerant from small to large circle when it reaches a certain temperature. If it starts to wedge, the motor will either very long heat, or very quickly.
The VAZ-2114 thermostat can be checked as followsway. Start the engine and heat it to a temperature of 90-95 degrees. Do not turn off the ignition, touch the bottom pipe of the radiator. If it is warm (hot), then everything is in order: the coolant circulates through a large circle and the overheating due to the thermostat is excluded. If the nozzle is cold, prepare to replace this part.
Another reason for overheating may be a traffic jamof the expansion tank. It is designed in such a way as to keep the system in a certain pressure, which in its performance is above atmospheric. This is to ensure that the water in the antifreeze or antifreeze does not boil at 100 degrees Celsius. If the plug is faulty and does not hold the correct pressure, the coolant may boil prematurely. This will not cause a special overheating of the motor, but it can cause a malfunction in the system.
You ask, what if all the basic elementscooling systems except for the fan work properly, but the VAZ-2114 warms the engine when driving, because a counterflow of air, even at an average speed, can easily replace the propeller? There can be only one reason - the cooling fins are clogged. Dirt, dust, leaves, branches, insects - all this day after day settles in layers, not allowing air to blow out the lamellas.
To avoid such a situation, the radiator must be periodically washed with a water jet, removing contamination.
