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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 754 (COOLING SYSTEM)COOLING SYSTEMINSPECTION
2004 Toyota Matrix XR, FWD, Standard

Cooling System: Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT THERMOSTAT 

    HINT:

    The thermostat is inscribed with the valve opening temperature.

    Fig 1: Identifying Temperature Valve
    G00915105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Immerse the thermostat in water, then gradually heat the water.
      Fig 2: Immersing Thermostat In Water
      G00915106Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect 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.

    3. Inspect the valve lift.

      Valve lift: 10 mm (0.39 in.) or more at 95°C (203°F) 

      If the valve lift is not as specified, replace the thermostat.

      Fig 3: Inspecting Valve Lift
      G00915107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check that the valve is fully closed when the thermostat is at low temperature (below 77°C (171°F)).

      If not fully closed, replace the thermostat.

  2. INSPECT WATER OUTLET CAP SUB-ASSY 
    NOTE:
    • If the water outlet 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 over 30° above horizontal.
    1. Using a radiator cap tester, slowly pump the tester and check that air is coming from the vacuum valve.

      Pump speed: 1 push / 3 seconds or more 

      Fig 4: Slowly Pumping Tester & Checking Air Coming From Vacuum Valve
      G00915108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.