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Home >> Jeep >> 2017 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Cooling System >> Engine >> Radiator, Engine Cooling >> Diagnosis And Testing >> Radiator Coolant Flow
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Radiator Coolant Flow

The following procedure will determine if coolant is flowing through the cooling system.

If engine is cold, idle engine until normal operating temperature is reached. Then feel the upper radiator hose. If hose is hot, the thermostat is open and water is circulating through cooling system.