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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 86 (Engine Cooling System - 1.6L - Optima (Except HEV)) >> Radiator >> Repair Procedures >> Inspection >> Radiator Leakage Test

Radiator Leakage Test

WARNING: This page is about a different variant/trim than selected.
  1. Wait until engine is cool, then carefully remove the radiator cap and fill the radiator with engine coolant, then install a pressure tester on it.
    Fig 1: Installing Pressure Tester On Radiator
    G11822784Courtesy of KIA MOTORS AMERICA, INC.
  2. Apply a pressure of 93 - 123 kPa (0.95 - 1.25 kgf/cm2 , 14 - 19 psi).
  3. Inspect for engine coolant leaks and a drop in pressure.
  4. If the pressure drops, check hoses, the radiator and the water pump for leakage. If there is no leakage, inspect the heater core, the cylinder block and the cylinder head.
  5. Remove the tester and reinstall the radiator cap.
    NOTE: Check for engine oil in coolant and/or coolant in engine oil.
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