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Home >> Acura >> 2012 >> RL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine 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: Installing Radiator Cap Seal On Pressure Tester
    G07353738Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Apply a pressure of 93-123 kPa (0.95-1.25 kgf/cm2 , 13.5-17.8 psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the radiator cap.
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