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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Engine Cooling System -- F250-F550 Super Duty) >> Diagnosis And Testing >> Engine Cooling >> Component Tests >> Coolant Thermostat >> Thermostat - Mechanical Test

Thermostat - Mechanical Test

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the coolant thermostat.
  2. Check the coolant thermostat for seating. Hold the coolant thermostat up to a lighted background. Leakage of light around the thermostat valve at room temperature indicates that the coolant thermostat should be replaced. Some coolant thermostats have a small leakage notch at one location on the perimeter of the thermostat valve, which is considered normal.
  3. Immerse the coolant thermostat in a boiling antifreeze and water mixture.
  4. See the GENERAL SPECIFICATIONS  for coolant thermostat opening temperatures.
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