LEXUS RX 300
1998 — 2003 of release
Repair and operation of the car
Lexus RX 300
+ Lexus RX-300 cars
+ Governing bodies and methods of operation
+ Settings and routine maintenance of the car
- Cooling systems of the engine, heating, ventilation and air conditioning
- Engine cooling system
General information and precautionary measures
Removal, check and installation of the water pump
Removal, check and installation of the thermostat
Check of components of the cooling system
Removal and installation of a radiator and fans
+ Systems of heating, ventilation and air conditioning
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ Schematic diagrams of electric connections
Engine cooling system
The cooling system of the engine works on the following algorithm. Until the engine is heated-up, the cooling liquid (CL) is pumped over by constantly working pump only in a head and the block of cylinders, and also in the heat exchanger of a heater of salon. At temperature increase of OZh to a certain level the thermostat opens a big contour of cooling and OZh circulates in addition through a radiator (from top to down) and is cooled with the air passing through it. At achievement of temperature of OZh of higher value the electric fan of the cooling system which creates an additional air stream through radiator edges for more intensive heat removal from it turns on.
Before work in a motive compartment, especially in the field of the radiator fan, surely disconnect a negative wire from the rechargeable battery and the fan electrical wiring socket. The fan of a radiator can turn on because of effect of heat conductivity even at the switched-off ignition.
Do not open a cover of a broad tank of OZh before full cooling of the engine in order to avoid a burn hot liquid or its steam.
If necessary to open a cover of a broad tank at the hot engine wind it with a thick layer of rags. Uncover slowly, gradually reducing vapor pressure.