Patriot 2WD L4-2.0L (2008)
Radiator Cap: Description and Operation
Radiator Pressure Cap - Description
GAS ENGINES
Cooling System Pressure Cap
The cooling system is equipped with a pressure cap that releases built up pressure, maintaining a range of 97-124 kPa (14-18 psi).
There is also a vent valve (6) in the center of the cap. This valve also opens when coolant is cooling and contracting, allowing coolant to return to
radiator from coolant recovery container by vacuum through connecting hose.If valve is stuck shut, the radiator hoses will be collapsed on cool
down. Clean the vent valve to ensure proper sealing when boiling point is reached.
