Subaru EF engine

The Subaru EF is a water-cooled, straight-three, four-stroke car engine that Subaru introduced in 1984 for the Subaru Justy. It has a belt-driven single overhead camshaft, a chain-driven balance shaft, an alloy cylinder head and a closed-deck iron block with a bore spacing of 86.0 mm. It was the first Subaru engine to carry its displacement in its name and remains the only Subaru engine with an iron block. The two-cylinder EK23 is closely related to it, sharing the bore spacing and overall design. The EF10 displaced 997 cc with two valves per cylinder and was limited to some European and Asian markets in the Justy J10 and the Libero E10, while the EF12 displaced 1,189 cc with three valves per cylinder, powered the Justy J12 and Libero E12, and an 80 bhp injected version went into the Subaru Tutto sold in Taiwan.