Cap, Reservoir: Description

Courtesy of CHRYSLER GROUP, LLC

1 - FILLER NECK SEAL

2 - VACUUM VENT VALVE

3 - PRESSURE RATING

4 - PRESSURE VALVE

The Low Temperature Radiator (LTR) cooling system is equipped with an 18 PSI pressure cap. This cap releases pressure at some point within a range of 110 - 138 kPa (16 - 20 psi). The pressure relief point is engraved on top of the cap.

NOTE:

The primary cooling system uses a 21 PSI cap, these caps must not be interchanged.

The cooling system will operate at pressures slightly above atmospheric pressure. This results in a higher coolant boiling point allowing increased radiator cooling capacity. The cap contains a spring-loaded pressure relief valve. This valve opens when system pressure reaches the release range of 110 - 138 kPa (16 - 20 psi).

A rubber gasket seals to the reservoir filler neck. This is done to maintain vacuum during coolant cool-down and to prevent leakage when system is under pressure.