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Home >> Acura >> 2012 >> ZDX >> 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: Removing Radiator Cap
    G08075389Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Apply a pressure of 93.3-122.7 kPa (0.951 - 1.251 kgf/cm2 , 13.53-17.79 psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the radiator cap.
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