3.1. General information
System of cooling of the engine
All models described in this Management are equipped with cooling systems with superfluous pressure in which management of circulation of a cooler is carried out by means of the thermostat.
The water pump of lopastny type established on the forward party of the block of cylinders, provides cooler circulation on the engine. The stream of a cooler washes everyone their cylinders and goes to a back part of the engine. The okhladitelny galleries cast in the block send a cooler stream round ports of the inlet pipeline and a final collector, to areas of installation of spark plugs and directing plugs of final valves.
The thermostat with a firm wax filler is built in the bottom hose on M10 engines, placed in a casing by a forward part of the engine on engines M20 and М30, or behind a knee under the top cover of a distributive belt (on the forward party of a head of cylinders) on M40 engines. During an engine warming up the closed thermostat prevents cooler circulation through a radiator. When the temperature of the engine comes nearer to normal working value, the thermostat opens and allows a hot cooler to circulate through a radiator where it is cooled and comes back back to the engine.
Pressure in system of cooling raises a boiling point of a cooler and increases overall performance of a radiator. Sealing of system is provided with a special tight cover. If pressure in system reaches a certain value, it influences the spring valve in a cover which opens and allows surplus of a cooler to follow through an overflow pipe.
The tight cover on models with four-cylinder engines is located on the top party of a radiator; on six-cylinder engines it is in the top part of a transparent plastic broad tank. Indicators of tightness of a cover are specified on the cover. Usually they make 1.0 bar or 1.2 bar.
Do not remove a germetichnuyukryshka from a radiator or a broad tank before complete cooling of the engine and complete dumping of pressure in cooling system. Cover removal at the hot engine can lead to strong burns.