The VAZ 2109 cooling system , engine and manifold, is considered one of the most effective automotive developments for internal combustion engines. All units and units of the system are built on the principle of compensation adjustment. The liquid cooling circuit of the running engine is closed and fully sealed. Any, even insignificant depressurization of the system - and the cooling mode will be violated. The engine will overheat, coolant will boil and the car will rise. Therefore, at least once a month, it is necessary to inspect all connecting hoses, pipes and gaskets.
If there is a leakage of coolant at the point where the hose is connected to the pipe, tighten the clamp. If the hose is cracked or frayed, it must be replaced. And in the event of a heater leak , you have to go to the car service, since all the connections of the pipes and fittings of the stove are hidden and you can not get close to them normally, you need a special tool. Cooling system VAZ 2109 allows troubleshooting without dismantling the components. If there are no leaks anywhere, it is necessary to control the cooling system of the car in any case. This is done with the help of an expansion tank, which is under the hood in a conspicuous place.
The reservoir has two designations on the plastic casing, Min. And Max., Two levels of coolant level. Exceeding the maximum level will give an excessive load to the safety valves and the pump, and an excessively low level of antifreeze or water creates the risk of air bubbles in the system and an increase in the degree of heating, up to boiling. Cooling system VAZ 2109 is designed quite rationally. At normal level, the coolant circulates uniformly in the cylinder block jacket, flows into the channels of the head of the unit, then enters the radiator, from the radiator into the interior heater, from the heater again into the unit's jacket and so on endlessly in a closed circle.
The movement of the coolant is provided by the water pump, which rotates from the engine crankshaft. The pump takes the liquid through the suction pipe and drives it, pushing it out forcefully out of the outlet branch pipe. This creates an intensive movement of the cooling component throughout the system. Adjustment of the temperature of the running motor is necessary, since all units and assemblies of the engine are designed for a strictly defined temperature regime. The engine cooling system VAZ 2109 maintains the optimum temperature within 85 - 95 degrees Celsius.
Heating in the specified range is provided by the radiator, fan and thermostat. The radiator is a structure consisting of two tanks and a series of thin-walled copper tubes and plates that let coolant pass through. Passing through the radiator tubes, the liquid cools down. Controls the process of lowering the temperature of the thermostat. It operates on the principle of a shut-off valve, opens the airlock when the temperature rises. When the temperature is lowered, the thermostat stops the circulation of the liquid.
The entire cooling system VAZ 2109 is built on the interaction of individual nodes. The effect of the thermostat is duplicated by a fan, which is installed between the outer grille of the engine compartment and the radiator. The fan is connected to a sensor mounted in the lower radiator tank. When the temperature rises, the sensor contacts are closed and the fan turns on. The impeller chases cold air throughout the radiator, the degree of heating of the coolant is reduced and thus the temperature regime of the entire engine of the VAZ 2109 is regulated, the cooling system of which is a reliable engineering development.