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Home >> Toyota >> 2009 >> Corolla S, 1.8 L, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Cooling System (2AZ-FE)) >> Radiator >> On-Vehicle Inspection

On-Vehicle Inspection

WARNING: This page is about a different variant/trim than selected.
  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.
      4. Apply engine coolant to rubber seals 2 and 3 before using a radiator cap tester.
        Fig 1: Locating Radiator Cap Rubber Seals
        G04829225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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: Checking Radiator Cap Pressure
        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 REFERENCE

        Item Specified Condition
        Standard value (for brand-new cap) 74 to 103 kPa (0.75 to 1.05 kgf/cm2 , 10.7 to 15 psi)
        Minimum standard value (for used cap) 59 kPa (0.60 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.
      NOTE:
      • To avoid damaging the fins, the injection direction should be at right angles to the radiator core surface (Please 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.
        Fig 3: Inspecting Fins For Blockage
        G06009315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard Injection Distance 

        INJECTION PRESSURE SPECIFICATION

        Injection Pressure Specified Condition
        2942 to 4903 kPa (30 to 50 kgf/cm2 , 427 to 711 psi) 300 mm (11.811 in.)
        4903 to 7845 kPa (50 to 80 kgf/cm2 , 711 to 1138 psi) 500 mm (19.685 in.)
      • If the fins are bent, straighten them with a screwdriver or pliers.
      • Do not expose electronic components to water.
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