Toyota Land Cruiser 100/Amazon, Lexus LX 470
since 1997 release
Repair and operation of the car
Toyota Land Cruiser, Amazon, Lexus LX470
+ Identification numbers of the car
+ Governing bodies and methods of safe operation of the car
+ Settings and routine maintenance of the car
- Cooling systems of the engine, heating of salon and air conditioning
Antifreeze - general information
Check of serviceability of functioning and replacement of the thermostat
Check of a state, removal and installation of the fan of the cooling system
Removal and installation of a radiator and broad tank of the cooling system
Check of a condition of the water pump
Removal and installation of the water pump
Check of serviceability of functioning and replacement of the block of the sensor of the measuring instrument of temperature of cooling liquid
Check of serviceability of functioning of a driving electric motor of the fan of a heater and its replacement
Removal and installation of the block and heat exchanger of a heater
Removal and installation of assembly of the control panel of functioning of a heater and conditioner of air
Check of serviceability of functioning and service of systems of heating and air conditioning
+ A power supply system and production of the fulfilled gases
+ Engine electric equipment
+ Control systems of the engine and decrease in toxicity of the fulfilled gases
+ Gear shifting box
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
Cooling systems of the engine, heating of salon and air conditioning
Engine cooling system
Scheme of circulation of cooling liquid (engine 2UZ-FE)
The Voskozapolnenny thermostat controls the working temperature of the engine in the course of its warming up. The first minutes after start of the cold engine the thermostat remains closed, preventing thereby circulation of cooling liquid through a radiator. In process of approach of temperature of the engine to normal working value, the thermostat valve gradually opens, connecting the radiator providing the maximum intensity of the heat sink from a working body (cooling liquid) to a cooling contour.
The cooling system has a tight design and is densely closed by the cover of a radiator capable to maintain a certain excessive pressure that provides increase in a boiling point of cooling liquid and, respectively, efficiency of the heat sink through a radiator. At excess by internal pressure in system of some certain value, the sprung plate of the radiator of the safety valve which is built in in a cover rises over the saddle, providing an overflowing of excess of cooling liquid on a connecting (overflow) tube in a broad tank. In process of cooling of system liquid automatically comes back from a tank to a radiator.
In view of the listed features of a design, such cooling system received the name closed as in it any functional losses of a working body are excluded.
System of heating
The main components of system of heating of salon are the electric fan and the heat exchanger placed in the box-shaped casing of a heater fixed under the car dashboard. The heat exchanger by means of rubber hoses is connected to the engine cooling system. On some models the back heater of salon located under the right front seat is established. The control unit of functioning of the heater/conditioner of air is built in in the car dashboard. The cooling liquid warmed in the engine circulates via the heater heat exchanger, giving the to the air which is warmly filling a casing. At inclusion of heating of salon there is an opening of the lamellar gate therefore the internal volume of a casing of a heater connects to the volume of salon. At turning on of the fan the krylchatka of the last begins to banish the air given to salon via the heat exchanger, providing its intensive warming up.
Air conditioning system
The condenser installed ahead of a radiator, the evaporator, close to the heater heat exchanger, fixed on the engine block the compressor, and filtering a receiver dehumidifier (accumulator) equipped with the reducing valve of high pressure are a part of air conditioning system. All components are connected among themselves by refrigerator lines.
The fan banishes the air coming to salon through the evaporator heat exchanger working in the mode, the return to the mode of functioning of a radiator. The coolant which is pumped over via the heat exchanger begins to boil and, evaporating, selects excess of heat at air. Temperature in salon at the same time decreases to the required comfortable value (at the choice of the operator). The compressor supports circulation of coolant in system, pumping over the warmed liquid via the condenser where it is cooled and comes back to the evaporator.