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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 464 (Engine Cooling System) >> Diagnosis And Testing >> Engine Cooling >> Component Tests >> Thermostat-Mechanical Test

Thermostat-Mechanical Test

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the water thermostat.
  2. Check the water thermostat for seating. Hold the water thermostat up to a lighted background. Leakage of light around the thermostat valve at room temperature indicates that a new water thermostat should be installed. Some water thermostats have a small leakage notch at one location on the perimeter of the thermostat valve, which is considered normal.
  3. Immerse the water thermostat in a boiling antifreeze and water mixture.
  4. See the GENERAL SPECIFICATIONS  chart for water thermostat opening temperatures.