Pressure Cap: Operation
CAUTION:
Use only the pressure cap specified for this vehicle. Use of other pressure caps can lead to coolant loss and overheating.
The pressure cap allows the cooling system to operate at higher than atmospheric pressure which raises the coolant boiling point, thus allowing increased radiator cooling capacity. The pressure cap releases pressure at some point within a range of 110 kPa +/- 14 kPa (16 psi +/- 2 psi).