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HOMESERVICE MANUALSTOYOTA20064RUNNER SR5, 4.7 T, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEMTHERMOSTAT (2UZ-FE)REPLACEMENT
2006 Toyota 4Runner SR5, 4.7 T, AWD

Thermostat (2UZ-FE): Replacement

2006 Toyota 4Runner SR5, 4.7 T, AWDSECTION Replacement

HINT:

Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

  1. DRAIN ENGINE COOLANT (See  REPLACEMENT   ) 
  2. SEPARATE WATER INLET 
    1. Remove the 3 nuts, and separate the water inlet from the water inlet housing.
      Fig 1: Removing Separating Water Inlet From Water Inlet Housing
      G04333668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE THERMOSTAT 
    1. Remove the thermostat.
    2. Remove the gasket from the thermostat.
  4. INSTALL THERMOSTAT 
    1. Install a new gasket to the thermostat.
    2. Insert the thermostat into the water inlet housing with the jiggle valve facing straight upward.

    HINT:

    The jiggle valve may be set within 30° of either side of the prescribed position.

    Fig 2: Inserting Thermostat Into Water Inlet Housing With Jiggle Valve Facing Straight Upward
    G04333669Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL WATER INLET 
    1. Install the water inlet with the 3 nuts.

      Torque: 19 N.m (195 kgf.cm, 14 ft.lbf) 

  6. REFILL ENGINE COOLANT (See  REPLACEMENT  ) 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.