FordPartsGiant.com offers the wholesale prices for genuine 1986 Ford Aerostar parts. Parts like External Parts Oil Cooling System - 4 Cyl. 140(2.3L) Diesel are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.3L. Transmission: 4AT A4LD.