THERMOSTAT INSTALLATION

INSTALL WATER INLET SUB-ASSEMBLY WITH THERMOSTAT
1. Install a new gasket and the water inlet sub-assembly with thermostat with the 3 nuts.
  
  Torque:
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
CONNECT NO. 2 RADIATOR HOSE
1. Connect the No. 2 radiator hose to the water inlet housing.
ADD ENGINE COOLANT
Note

Before adding coolant, turn the A/C switch OFF.

Total capacity

11.9 liters (12.6 US qts, 10.5 Imp. qts)
1. Tighten the radiator drain cock plug by hand.
2. Tighten the 2 cylinder block drain cock plugs.
  
  Torque:
  
  13 N*m { 133 kgf*cm, 10 ft.*lbf }
3. Add TOYOTA Super Long Life Coolant (SLLC) into the radiator reservoir.
  
  Capacity
  
  Approximately 5.0 liters (5.3 US qts, 4.4 Imp. qts)
  Tech Tips
  - LEXUS vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).
  - Contact any authorized LEXUS dealer or repairer or another duly qualified and equipped professional for further details.
  - Thermostat opening timing can be confirmed by squeezing the inlet radiator hose and sensing vibrations when the coolant starts to flow inside the hose.
4. Further add coolant into the reservoir until it reaches the FULL line.
5. Squeeze the No. 1 and No. 2 radiator hoses several times, and then check the coolant level.
  
  If the coolant level is low, add coolant.
6. Using a 6 mm socket hexagon wrench, install the vent plug.
  
  Torque:
  
  1.5 N*m { 15 kgf*cm, 13 in.*lbf }
7. Bleed air from the cooling system.
  
  Note
  
  Before starting the engine, turn the A/C switch off.
  1. While idling the engine for approximately 10 minutes, make sure that the coolant remains at the FULL line by adding coolant as necessary.
  2. After idling the engine for 10 minutes, add coolant to the level shown in the illustration.
    
    Capacity
    
    Approximately 2.5 to 3.5 liters (2.6 to 3.7 US qts, 2.2 to 3.1 Imp.qts)
  3. Close the radiator reservoir cap, and run the engine at 1500 to 2000 rpm for 5 minutes.
    
    Tech Tips
    
    Thermostat opening timing can be confirmed by squeezing the No. 1 radiator hose and sensing vibrations when the SLLC starts to flow inside the hose.
    
    CAUTION:
    
    When squeezing the radiator hose:
    
    Wear protective gloves.
    
    Be careful as the radiator hose is hot.
    
    Keep your hands away from the radiator fan.
8. Stop the engine and wait until the coolant cools down to ambient temperature.
  
  CAUTION:
  
  Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot coolant and steam may be released and cause serious burns.
9. Check the coolant level.
  
  If the coolant level is below the FULL line, add coolant until it reaches the FULL line.
INSPECT FOR COOLANT LEAK
Note

Before performing each inspection, turn the A/C switch OFF.

CAUTION:

Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
1. Fill the radiator with coolant and attach a radiator cap tester.
2. Warm up the engine.
3. Using the radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf/cm², 17 psi), and check that the pressure does not drop.
  
  If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and head.
INSTALL NO. 1 AIR CLEANER INLET
1. Install the No. 1 air cleaner inlet with the bolt and clip.
  
  Torque:
  
  5.0 N*m { 51 kgf*cm, 44 in.*lbf }
INSTALL COOL AIR INTAKE DUCT SEAL
1. Install the cool air intake duct seal with the 9 clips.
INSTALL ENGINE UNDER COVER