For All early engines. Non Genuine as original Airtex tooling that Rover used has been scrapped.
This water pump has an aluminum body with by pass hose take off, this original type pump has a small cast metal impeller for early A series engines. Further reduction of cavitation is achieved by using a large diameter water pump pulley as originally fitted to the Cooper S and reintroduced on the A-Plus engines. It is necessary to check clearance between the large pulley and the head, if a lot of material has been machined from the head face it may foul the pulley.