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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Cooling System - 6.7L Power Stroke Diesel) >> Diagnosis And Testing >> Engine Cooling >> Component Test(s) >> Thermostat Visual Inspection

Thermostat Visual Inspection

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the thermostat.
  2. Examine the thermostat for signs of damage including:

    • Valve not fully seated (light visible through the valve)
    • Foreign material lodged in the main valve
    • Bent or broken frame or flange
    • Bent or broken spring
    • Wax leaking from wax reservoir or a bulge in the reservoir
    • Any other damage or distortion

  3. NOTE: If no damage is found during the inspection, do not attempt to open the thermostat using hot water or other heat sources. This method is not an accurate means to test the function of the thermostat and may damage the thermostat.

    If damage is found during the inspection, remove any foreign material or broken pieces and install a new thermostat.

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