Engine Cooling System (1GR-FE): Removal & Installation Toyota 4Runner IV рестайлинг

REMOVAL

HINT

If the thermostat was not installed, cooling efficiency would be harmed. Even if the engine tends to overheat, do not remove the thermostat.

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1. DRAIN ENGINE COOLANT (See «COOLANT»(ref-280548-S06481428562008022200000) )
2. REMOVE V-BANK COVER (See «REMOVAL»(ref-280570-S10572357662008022200000) )
3. DISCONNECT RADIATOR OUTLET, NO.2 HOSE CLAMP OR CLIP
4. REMOVE WATER INLET WITH THERMOSTAT Remove the 3 nuts, water inlet with thermostat and gasket.

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1. INSPECT WATER INLET WITH THERMOSTAT HINT: The valve opening temperature is inscribed on the thermostat. Immerse the thermostat in water, then gradually heat the water. Check the valve opening temperature of the thermostat. Valve opening temperature: 80 to 84°C (176 to 183°F) If the valve opening temperature is not as specified, replace the thermostat. Check the valve lift. Valve lift: 8.0 mm (0.31 in.) or more at 95°C (203°F) If the valve lift is not as specified, replace the thermostat. Check that the valve is fully closed when the thermostat is at low temperature (below 40°C (104°F)). If not fully closed, replace the thermostat.

INSTALLATION

1. INSTALL WATER INLET WITH THERMOSTAT Install a new gasket to the water inlet with thermostat. Install the water inlet with thermostat with the 3 nuts. Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf)
2. CONNECT RADIATOR OUTLET, NO.2 HOSE CLAMP OR CLIP
3. ADD ENGINE COOLANT (See «COOLANT»(ref-280548-S06481428562008022200000) )
4. INSPECT ENGINE COOLANT LEAK (See «REPLACEMENT»(ref-280548-S21263854542008022200000) )
5. INSTALL V-BANK COVER Install the V-bank cover with the 2 nuts. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf)

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1. INSPECT RADIATOR CAP SUB-ASSEMBLY NOTE: If the radiator cap is contaminated, rinse it with water. Before using a radiator cap tester, wet the relief valve and pressure valve with engine coolant or water. When performing the following steps [A} and [B], keep the tester at an angle of 30° or more above the horizontal. Using a radiator cap tester, slowly pump and check that air comes from the vacuum valve [A]. Pumping speed: 1 push every 3 seconds or more NOTE: Push the pump at a constant speed. If air does not come from the vacuum valve, replace the reservoir cap. Pump the tester, then measure the relief valve opening pressure [B]. Pumping speed: 1 push every second NOTE: The above pumping speed is for the first pumping only (in order to close the vacuum valve). After the first pumping, the pumping speed can be reduced. HINT: Use the tester's maximum reading as the opening pressure. Standard opening pressure: 93 to 123 kPa (0.95 to 1.25 kgf*cm 2 , 13.5 to 17.8 psi) Minimum opening pressure: 78 kPa (0.8 kgf*cm 2 , 11.4 psi) If the opening pressure is less than the minimum, replace the radiator cap.

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1. INSPECT FINS FOR BLOCKAGE If the fins are clogged, wash them with water or a steam cleaner, then dry them with compressed air. NOTE: If the distance between the steam cleaner and core is too small, there is a possibility of damaging the fins, so keep to the following injection distances. INJECTION PRESSURE AND INJECTION DISTANCE SPECIFICATION Injection Pressure kPa (kg/cm 2 , psi) Injection Distance mm (in.) 2,942 to 4,903 (30 to 50, 427 to 711) 300 (11.811) 4,903 to 7,845 (50 to 80, 711 to 1,138) 500 (19.685) If the fins are bent, straighten them with a screwdriver or pliers. Be careful not to expose electronic components to water.

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1. DRAIN ENGINE COOLANT (See «COOLANT»(ref-280548-S06481428562008022200000) )
2. REMOVE RADIATOR SUPPORT SEAL UPPER Remove the 11 clips and radiator support upper.
3. SEPARATE FAN SHROUD Disconnect the reserve tank hose from the radiator. Disconnect the radiator hose No. 1 from the radiator. Disconnect the oil cooler inlet hose from the radiator. Disconnect the oil cooler outlet hose from the radiator. Disconnect the radiator hose No. 2 from the radiator. Remove the 3 bolts, and separate the fan shroud. HINT: Temporarily put the separated fan shroud at an appropriate location in the engine room.
4. REMOVE RADIATOR ASSEMBLY Remove the 4 bolts and radiator.
5. REMOVE RADIATOR SUPPORT NO.1 Remove the 1 radiator support No. 1.
6. REMOVE RADIATOR SUPPORT NO.2 Remove the 3 radiator support No. 2.
7. REMOVE RADIATOR SUPPORT NO.1 BUSH Remove the 4 radiator support No. 1 bush.

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1. INSTALL RADIATOR ASSEMBLY Insert the tabs of the radiator support through the radiator service holes. Install the radiator assembly with the 4 bolts. Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)
2. INSTALL FAN SHROUD Insert the tabs in the slots shown in the illustration, attach the fan shroud with the 3 bolts. Torque: 5.0 N*m (51 kgf*cm, 44 in.*lbf)
3. ADD ENGINE COOLANT (See «COOLANT»(ref-280548-S06481428562008022200000) )
4. INSPECT ENGINE COOLANT LEAK (See «REPLACEMENT»(ref-280548-S21263854542008022200000) )