Inspect Cooling System For Leaks

a. Fill the radiator with coolant and attach a radiator cap tester.

b. Warm up the engine.

c. Pump it to 118 kPa (1.2 kgf/cm2 , 17.1 psi), and check that the pressure does not drop.

If the pressure drops, check the hoses, radiator or water pump for leaks. If no external leaks are found, check the heater core, cylinder block and head.

2006 ENGINE Cooling - Sequoia

Fig. 22: Filling Radiator With Coolant

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 22: Filling Radiator With Coolant

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4. REINSTALL RADIATOR CAP

ON-VEHICLE CLEANING

1. INSPECT FINS FOR BLOCKAGE

a. If fins are clogged, wash them with water or a steam cleaner and dry with compressed air.

NOTE:

• If the distance between the steam cleaner and the core is too close, the is a possibility of damaging the fin, so keep the following injection distance.

NJECTION PRESSURE AND DISTANCE CHART

Injection Pressure

Injection Distanci

2,942 to 4,903 kpa (30 to 50 kg/cm2 , 427 to 711 psi)

300 mm (11.811 W

4,903 to 7,845 kpa (50 to 80 kg/cm2 , 711 to 1,138 psi)

500 mm (19.685 W

• If the fins are bent, straighten them with a screwdriver or pliers.

• Never apply water directly onto the electronic components.

2006 ENGINE Cooling - Sequoia

Fig. 23: Inspecting Fins For Blockage Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL

1. REMOVE ENGINE UNDER COVER NO.1

2. DRAIN ENGINE COOLANT

3. DISCONNECT RADIATOR RESERVOIR HOSE FROM RADIATOR

4. DISCONNECT UPPER RADIATOR HOSE FROM RADIATOR

5. DISCONNECT LOWER RADIATOR HOSE FROM RADIATOR

6. DISCONNECT A/T OIL COOLER HOSES FROM RADIATOR

7. REMOVE NO.2 FAN SHROUD

a. Remove the 2 clips and No.2 fan shroud.

8. REMOVE RADIATOR ASSEMBLY

a. Remove the 4 bolts and radiator assembly.

2006 ENGINE Cooling - Sequoia

Fig. 24: Removing bolts & radiator assembly Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

9. REMOVE NO.1 FAN SHROUD

a. Remove the 4 bolts and No.1 fan shroud.

INSTALLATION

1. INSTALL NO.1 FAN SHROUD

a. Install the No.1 fan shroud with the 4 bolts.

2. INSTALL RADIATOR ASSEMBLY

a. Set the radiator bracket hooks to the radiator support holes.

b. Install the 4 bolts.

2006 ENGINE Cooling - Sequoia

Fig. 25: Setting Radiator Bracket Hooks To Radiator Support Holes Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. INSTALL NO.2 FAN SHROUD

a. Install the No.2 fan shroud with the 2 clips.

4. CONNECT A/T OIL COOLER HOSES TO RADIATOR

5. CONNECT UPPER RADIATOR HOSE TO RADIATOR

6. CONNECT LOWER RADIATOR HOSE TO RADIATOR

7. CONNECT RADIATOR RESERVOIR HOSE TO RADIATOR

8. FILL WITH ENGINE COOLANT

9. START ENGINE AND CHECK FOR ENGINE COOLANT LEAKS

10. RECHECK ENGINE COOLANT LEVEL

11. INSTALL ENGINE UNDER COVER NO.1

2006 ENGINE PERFORMANCE Engine Control System - Sequoia

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