Engine cooling and heating Toyota 4Runner 2 (N120)

Cooling, heating and ventilation systems
The heating system includes: fan and radiator mounted under the front panel; hoses for supplying and draining coolant from the engine cooling system; interior air heating/cooling control panel. The air conditioning...

Technical data of the cooling and heating system
Radiator cap valve opening pressure 0.6 – 1.0 bar Thermostat response temperature 80 – 85°C Type of refrigerant in the air conditioning system R – 134A Quantity 600 – 700 g Tightening torques (in Nm) Oil cooler bypass...

Cooling system thermostat — replacement
4-cylinder engine thermostat 1. Thermostat; 2. Gasket; 3. Inlet pipe 3.4L (or 3.0L) V6 engine thermostat 1. Thermostat; 2. Gasket; 3. Clamp; 4. Hose; 5. Inlet pipe If the lower radiator hose is cool when the engine is...

Fan impeller and fluid coupling — inspection, removal and installation
1. If cracks are found on the blades or the impeller has play on the shaft, replace the impeller. 2. If a leak is detected from the coupling, or if the impeller rotates too freely or too tightly, replace the coupling....

Radiator and reservoir — removal and installation
Radiator and related parts 1, 4. Hose; 2, 15, 22. Rack; 3, 21. Cork; 5. Battery clamp; 6. Battery; 7. Tray; 8. Casing 1; 9. Casing 2; 10. Tank; 11. Lattice; 12. Side light; 13. Pump pulley; 14. Impeller and coupling;...

Oil cooler — removal and installation
Oil cooler parts 1. Ring; 2, 4. Gasket; 3. Oil cooler; 5. Bypass valve; 6. Hose 1; 7. Hose 2 Removal 1. Disconnect the battery from ground. 2. After the engine has completely cooled down, drain the fluid. 3. Remove the...

Checking the water pump
1. With the engine running and warm, pinch the upper radiator hose and gradually release it. If the pump is working properly, you should feel a stream of liquid in the hose. 2. The pump has a control hole for draining...

Removal and installation the water pump
Coolant pump on 4-cylinder engines 1. Gasket; 2. Pump; 3. Belt; 4. Pulley; 5. Coupling; 6. Impeller; 7. Casing 1; 8. Casing 2 4-cylinder engines 1. Disconnect the battery from ground and drain the coolant (see...

Coolant Temperature Sensor — Checking and Replacing
Location of the temperature sensor on 4-cylinder engines 1. Temperature sensor 2. Oil pressure sensor Temperature sensor on the V6 3.0L engine 1. Temperature sensor 2. Oil pressure sensor Temperature sensor on the V6...

Heater Fan Motor and Circuit — Check and Replace
Heater motor with front panel removed Rear blower unit parts Attention! When working on the heater, turn the ignition key to the LOCK position, disconnect the battery from the ground and start work no earlier than 2...

Heater radiator — removal and installation
Front heater 1. Radiator; 2. Ventilation duct; 3. Body; 4. Tubes Rear heater 1. Front seats; 2. Rear center section; 3. Rear heater; 4, 6. Body; 5. Radiator; 7. Relay; 8. Wires; 9. Resistor; 10. Electric motor; 11....

Air conditioning unit control panel
Typical arrangement of air conditioning unit control cables 1. Air intake flap cable 2. Mixing flap cable 3. Ventilation flow control cable Removal 1. Disconnect the battery from ground. 2. Remove the center panel trim...

Air conditioning system — design description
Air conditioning system of Toyota 4 Runner/ Hilux/ Surt 1996 1. Main relay; 2. Heater radiator; 3. Front heater main relay; 4. Air conditioning; 5. Evaporator; 6. Expansion valve; 7. Fan resistor; 8. Thermistor; 9....

Checking the air conditioner refrigerant charge
Main units of the air cooling system 1, 8. Suction hose; 2. Tube with liquid refrigerant; 3. Evaporator; 4. Expansion valve; 5. Outlet hose (2.7L engine); 6. Outlet hose (3.4L engine); 7, 12, 13. Tube with liquefied...

Checking the heating system
1. If there is no air heating in the heater, the following may be the reasons: the thermostat does not close, as a result of which the liquid is not heated sufficiently and does not heat the heater radiator well -...

Air Conditioning Compressor — Removal and Installation
Compressor mounting parts on a 4-cylinder engine 1. Bracket; 2. Belt; 3. Engine shields; 4. Tighten with a torque wrench; 5. Outlet hose; 6. Suction hose; 7. Ring Compressor and related parts on a 3.4L V6 engine 1....

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