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Home >> Jeep >> 2007 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine & Automatic Transmission Cooling System) >> Engine >> Thermostat-Engine Coolant >> Operation >> Engine Coolant Thermostat-Operation

Engine Coolant Thermostat-Operation

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The wax pellet is located in a sealed container at the spring end of the thermostat. When heated, the pellet expands, overcoming closing spring tension and water pump pressure to force the valve to open.

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