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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 41 (Engine Cooling System - 2.0L (Except HEV)) >> Thermostat >> Repair Procedures >> Inspection

Repair Procedures: Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Immerse the thermostat in water and gradually heat the water.
    Fig 1: Immersing Thermostat In Water
    G11994037Courtesy of HYUNDAI MOTOR AMERICA
  2. Check the valve opening temperature.

    Valve opening temperature:  88°C (190°F)

    Full opening temperature:  100°C (212°F)

    If the valve opening temperature is not as specified, replace the thermostat.

  3. Check the valve lift.

    Valve lift:  8 mm (0.3 in) or more at 100°C (212°F)

    If the valve lift is not as specified, replace the thermostat.

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