Fan Belt - 1/2 inch - Single Pulley - 217391
Certain North American market carburetter-engined TR6s had a fan belt that was 1/2" wide in place of the 3/8" wide belt fitted to all TR6 P.I. models. The associated pulleys that the 1/2" fan belt ran with were also wider (which in turn means that the fixed pulley water pumps were also different). To this end, an owner must check the width of the belt and pulley system on his or her car prior to ordering replacement parts, if there is any doubt regarding the originality of the specification of the engine.