Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
Thermostat: Specifications
Remove the water thermostat and immerse it in a boiling antifreeze and water mixture. At 89°C (192°F) the water thermostat should open to 0.08 mm
(0.003 inch), and when heated to 100°C (212°F), it should open to 3.2 mm (0.125 inch).
If heat is not available, check the water thermostat for leakage. Hold the water thermostat up to a lighted background. Leakage of light around the
thermostat valve at room temperature indicates that the water thermostat should be replaced. Some water thermostats have a small leakage notch at one
location on the perimeter of the thermostat valve, which is considered normal.
