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Home >> Acura >> 2009 >> RL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System >> Radiator Cap Test

Radiator Cap Test

  1. 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: Checking Radiator Cap For Drop In Pressure
    G06163630Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Apply a pressure of 93 - 123 kPa (0.95 - 1.25 kgf/cm2 , 14 - 18 psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the cap.
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