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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 43 (Engine Cooling System (HEV)) >> Radiator (Engine) >> Repair Procedures >> Inspection >> Radiator Cap Testing

Radiator Cap Testing

WARNING: This page is about a different variant/trim than selected.
  1. Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.
    Fig 1: Testing Radiator Cap
    G11815429Courtesy of KIA MOTORS AMERICA, INC.
  2. Apply a pressure of 93.16 ~ 122.58kPa (0.95 ~ 1.25kgf/cm2 , 13.51 ~ 17.78psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the cap.
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