Engine cooling system
All engines presented in the atom guide have a closed cooling system with coolant circulation controlled by a thermostat. The coolant pump is mounted on the cylinder/crankcase block on the accessory drive belt side. It pumps coolant through the engine. The flow of coolant washes each cylinder and is directed towards the end of the engine, which is docked with the transmission. Through the channels in the block head, the coolant flows to the intake and exhaust ports, as well as to the area of \u200b\u200bthe spark plugs and exhaust valve guides.
The fuse-filled thermostat is housed in a housing that is attached to the transmission side of the engine. During engine warm-up, the thermostat is closed, which will prevent the circulation of coolant through the radiator. In this phase, the coolant returns through a metal pipe located across the engine at the front of the engine and enters the lower radiator hose and pump. The fluid supply to the heater is carried out from the rear side of the thermostat housing. When the engine temperature approaches normal when the engine warms up, the thermostat opens, due to which the heated coolant passes through the radiator, in which it is cooled, and then returns to the engine.
The radiator is made of aluminum alloy, and its tanks are plastic. On models with automatic transmission, a transmission fluid cooler is built into the left reservoir.
The cooling system is sealed with a sealed expansion tank cap. Due to the pressure in the system, the boiling point of the coolant rises, as a result of which the cooling efficiency of the radiator increases.
When the engine reaches normal operating temperature, excess coolant, which expands when heated, enters the expansion tank. When the system cools, excess liquid is automatically sucked into the radiator from the tank,
Warning: DO NOT attempt to open the expansion tank cap or change the adjustment of the cooling system components while the engine is warm due to the risk of scalding. If it is necessary to open the cover of the expansion tank before the engine and radiator have completely cooled down (even if it's not recommended) First of all, it is necessary to relieve the pressure in the cooling system. Cover the lid with a thick cloth to avoid scalding. and slowly unscrew it until a whistling sound is heard. After the whistling sound stops, which corresponds to the removal of pressure. slowly unscrew the cap to the end. If the whistling sound reappears when the cap is turned off, stop turning immediately and wait for the sound to stop. During this procedure, turn your face away from the cover, and also protect your hands.
Do not allow antifreeze to come into contact with skin or painted vehicle surfaces. Wash off spills immediately with plenty of water. Never leave antifreeze in an open container or on the floor. Children and pets may be attracted to this smell, but antifreeze is very dangerous.
When the engine is hot, the electric fan may start to rotate even when the ignition is off. Be careful when working in the engine compartment, try. so that hair and loose clothing are at a sufficient distance from danger.
Heating / ventilation system
This system includes a supercharger and a heat exchanger located in the heater assembly and hoses connecting the heat exchanger to the engine cooling system. The heated coolant circulates through the heat exchanger. When you actuate the heater temperature control located on the front panel, the damper opens, due to which the heater communicates with the passenger compartment. When you operate the blower control, the blower directs air through the heater assembly in accordance with the selected parameters. On models without an air conditioning system, the heater handle is connected by a cable to the damper.
Outside air entering the ventilation system passes through a dust filter installed under the grille panel located in front of the windshield (Chapter 1). This filter must be replaced regularly.
The distribution of air in the ventilation system is carried out with the help of several dampers with a vacuum drive located in the heater housing. The vacuum tank receives vacuum from the engine through a check valve. This tank is also connected to a distributor, which, in turn, is connected to three vacuum blocks installed in the heater housing. Vacuum hoses are color coded:
- A) Black - vacuum line
- b) White - line of the recirculation damper
- V) Gray and blue - vacuum inlet / outlet to the damper located on the lower level
- G) Red and yellow - vacuum inlet / outlet to the defroster damper
Air conditioning system
See paragraph 11.
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