Oil Pressure Relief Ball – Cooper S Type

Description

The standard aluminium plunger is prone to sticking. The cooper S fixed this problem by using a ball bearing relief valve instead of a plunger type.

When fitted with the cooper S spring it should give a nice 75PSI pressure at high RPM.

Important fitting note:
Where described, all parts are labelled by nearside/offside or left and right. This is always identified from a right hand drive (UK) vehicle, or if you were looking at the car from the back facing forward.