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Radiator Cap Test

  1. Remove the engine compartment covers (see ENGINE COMPARTMENT COVER REPLACEMENT ).
  2. Wait until the engine is cool, then carefully remove the radiator cap (A). Wet the radiator cap seal with engine coolant, then install it on a commercially available pressure tester (B).
    Fig 1: Installing Wet Radiator Cap Seal On Pressure Tester
    G08069219Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Apply a pressure of 93- 123 kPa (0.95- 1.25 kgf/cm2 , 13.5- 17.8 psi)
  4. Check for a drop in pressure.
  5. If the pressure drops, replace the radiator cap.
  6. Install the engine compartment covers (see ENGINE COMPARTMENT COVER REPLACEMENT ).
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