Subaru Justy Engine

Subaru Justy EF12 Parts:

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Subaru EF12 Engine Subaru EF12 Shortblock

The Subaru Justy features a unique inline three cylinder based off of the Suzuki G10 engine. Subaru took Suzuki's design and refined it, making their own 1.0L and 1.2L versions, the EF10 and the EF12. The EF12 is what all US-Model Justys are equipped with. Introduced in 1987, this belt driven SOHC 3cyl with iron block, aluminum head, chain driven balance shaft, and three valves per cylinder was made to compete in the sub-compact class, where other cars had four cylinders. The EF12 was highly competitive, and in 1990 optional multi-port fuel injection appeared boasting 1HP per cubic inch! The EF12-E replaced the EF12 in 1991, (which was the last carbureted car sold in the US). The EF12-E was the only engine used until 1994 when Subaru pulled the plug on the Justy and the EF engine.

Engine	Bore	Stroke	Displacement	Compression	Horsepower	Torque	Fuel System
EF10	78mm (3.07")	69.6mm (2.74")	998cc (61cid)	9.5:1	47@5000rpm	59@3200rpm	1bbl Hitachi
EF12	78mm (3.07")	83mm (3.27")	1189cc (73cid)	9.0:1	66@5200rpm	70@3600rpm	2bbl Hitachi
EF12-E	78mm (3.07")	83mm (3.27")	1189cc (73cid)	9.1:1	73@5600rpm	71@3600rpm	Multi-Port FI

Click for: Service Information, Diagrams, Specifications, Capacities, Torque Specs

Belts

OEM A/C Belt for 1987-1988 - DJCB1 NO LONGER AVAILABLE

OEM A/C Belt for 1989-1990 Hitachi - DJCB2 NO LONGER AVAILABLE

Cooling System

Fuel System

*Subaru has never offered what would be considered to old school mechanics as a complete carburetor kit. What Subaru calls a 'Carburetor Rebuild Kit' consists of gaskets, seals, and copper washers: basically enough to take apart the carb, clean it, and put it back together. This is usually sufficient but all other parts (needle, seat, etc) must be ordered seperately!*