Toyota Land Cruiser 100/Amazon, Lexus LX 470

since 1997 of release

Repair and car operation

Toyota Land Cruiser, Amazon, LX470 Lexus
+ Identification numbers of the car
+ Governing bodies and receptions of safe operation of the car
+ Settings and routine maintenance of the car
+ Engine
- Systems of cooling of the engine, salon and air conditioning heating
   Antifreeze - general information
   Check of serviceability of functioning and thermostat replacement
   Condition check, removal and installation of the fan of system of cooling
   Removal and installation of a radiator and broad tank of system of cooling
   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 a measuring instrument of temperature of cooling liquid
   Check of serviceability of functioning of the driving electromotor of the fan of a heater and its replacement
   Removal and installation of the block and heater heat exchanger
   Removal and installation of assembly of the control panel by functioning of a heater and air conditioner
   Check of serviceability of functioning and service of systems of heating and air conditioning
+ the 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
+ Body
+ Onboard electric equipment

Check of serviceability of functioning and thermostat replacement

Do not open a cover of a radiator and do not remove the thermostat before complete cooling of the engine! See also prevention at the beginning of the Section Antifreeze – general information.



1. Before finally affirming as opinion on a thermostat exit out of operation, check level of cooling liquid in system, a condition and effort of a tension of a driving belt (see. Head of Control and routine maintenance of the car), and also serviceability of functioning of a measuring instrument / control lamp of temperature.
2. One of the possible reasons of too slow warming up of the engine (according to measuring instrument indications) is thermostat jamming in open situation. Replace the thermostat new.
3. In case of an overheat of the engine touch a hand the bottom hose of a radiator. If the hose is not heated up, possibly, the thermostat is jammed in a closed position, blocking circulation of cooling liquid through a radiator. Replace the thermostat.

At all do not maintain the car with the removed thermostat, feedback of the onboard processor that will lead to increase of toxicity of the fulfilled gases and excessive increase in fuel consumption thus can become torn.

4. If the bottom hose is heated up, it means that cooling liquid regularly circulates through a radiator, i.e. the thermostat is open. Address to materials of the Section devoted to diagnostics of malfunctions of system of cooling (see. Introduction at the beginning of the real Management).
5. Thermostat check on a workbench gives the most exact results.
6. Remove the thermostat from the engine (see below).
7. Tie up to thermostat assembly a piece of a wire and lower it in the capacity filled with water. There lower the thermometer.

Track, that the thermometer and the thermostat did not adjoin to walls and a capacity bottom.

8. Start to warm up slowly water, watching change of indications of the thermometer, – operation of the valve of the thermostat should occur in strict accordance with requirements of Specifications.
9. Estimate size of complete opening of the valve, the nominal rate makes 8 mm (address to an accompanying illustration).


Details of installation of the thermostat on the petrol engine


1. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped with a security code before disconnecting the battery make sure that have the correct combination for audiosystem input in action!

2. Merge cooling liquid (see. Head of Control and routine maintenance of the car).
3. At the corresponding complete set disconnect from a thermostat casing vacuum hoses.
4a. Separate a thermostat casing from the engine (address to an illustration above), prepare for collecting spilled cooling liquid.
4b. The Radiatorny hose if it does not need replacement, can be left connected to a casing (address to an accompanying illustration).
5. Take the thermostat from a casing, try to remember its adjusting situation. Carefully smooth out sealing surfaces of a cover and a thermostat casing a scraper, then wipe their rags moistened in solvent.
6. Establish new rubber sealing laying.
7. Establish the thermostat and its casing on the regular places, at the corresponding complete set track, that assembly appeared is developed by the pumping valve up.
8. Tighten all fixture with demanded effort. Operating as it should be the return to a dismantle order, establish into place all acting in film components.
9. Fill cooling system (see. Head of Control and routine maintenance of the car). Start the engine and check it on existence of leaks and serviceability of functioning of the thermostat (see paragraphs with 2 on 4, Check).