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Home >> Toyota >> 2009 >> Matrix Base, Standard >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System (2ZR-FE) >> Radiator >> On-Vehicle Inspection

On-Vehicle Inspection

  1. CHECK RADIATOR CAP SUB-ASSEMBLY 
    1. Measure the valve opening pressure.
      1. If there are water stains or foreign matter on rubber seal 1, 2 or 3, clean the part(s) with water and finger scouring.
      2. Check that rubber seals 1, 2 and 3 are not deformed, cracked or swollen.
      3. Check that rubber seals 3 and 4 are not stuck together.
        Fig 1: Identifying Rubber Seals Positions
        G06009388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Apply engine coolant to rubber seals 2 and 3 before using a radiator cap tester.
      5. When using the cap tester, tilt it upwards 30° or more.
      6. Pump the cap tester several times, and check the maximum pressure*1.

        Pumping speed: 

        1 pump per second 

        Fig 2: Using Cap Tester, Tilt It Upwards 30° Or More
        G04829226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        *1: Even if the cap cannot maintain the maximum pressure, it is not defective.

        Judgment Criteria 

        JUDGMENT CRITERIA

        Item Specified Condition
        Standard value (for brand-new cap) 74.0 to 103.0 kPa (0.7S to 1.05 kgf/cm2 , 10.7 to 14.9 psi)
        Minimum standard value (for used cap) 59.0 kPa (0.6 kgf/cm2 , 8.6 psi)

        If the maximum pressure is less than the minimum standard value, replace the radiator cap sub-assembly.

  2. INSPECT FINS FOR BLOCKAGE 
    1. If the fins are clogged, wash them with water or a steam cleaner and dry them with compressed air.
      Fig 3: Cleaning Radiator Fins
      G06009390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • To avoid damaging the fins, the injection direction should be at right angles to the radiator core surface.
      • Use it for core perpendicularly.
      • If the steam cleaner is too close to the radiator core, there is a possibility of damaging the fins, so keep the following injection distances.

      Standard Injection Distance 

      STANDARD INJECTION DISTANCE

      Injection Pressure Specified Condition
      2942 to 4903 kPa (30 to 50 kgf/cm2 , 427 to 711 psi) 300 mm (11.81 in.)
      4903 to 7845 kPa (50 to 80 kgf/cm2 , 711 to 1138 psi) 500 mm (19.69 in.)
      NOTE:
      • If the fins are bent, straighten them with a screwdriver or pliers.
      • Do not expose electronic components to water.
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