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Engines
Japan
1980s

Subaru EF engine

Subaru EF engine range

 The EF is an automotive engine made by Subaru, introduced in 1984 for the Subaru Justy. It is a water-cooled, straight-three engine, four-stroke engine with a belt-driven single overhead camshaft, and a chain-driven balance shaft. It has an alloy cylinder head and a closed deck iron engine block.

EF10

1.0-litre (997 cc) two valves per cylinder Bore x Stroke: 78 mm (3.1 in) x 69.6 mm (2.7 in)

Power: 47 bhp (35 kW; 48 PS) @5000 rpm/59 lb·ft (80 N·m) @ 3200 rpm with single barrel Hitachi carburetor and 9.5:1 compression ratio

Usage:

  • Subaru Justy "J10" (limited to some European markets and Asia)
  • Subaru Libero "E10"

EF12

1.2-litre (1189 cc) three valves per cylinder Bore x Stroke: 78 mm (3.1 in) x 83 mm (3.3 in)

Power: 66 bhp (49 kW; 67 PS) @5200 rpm/70 lb·ft (95 N·m) @ 3600 rpm with two barrel Hitachi carburetor and 9:1 compression ratio.73 bhp (54 kW; 74 PS) @5600 rpm/71 lb·ft (96 N·m) @ 3600 rpm with multi-port fuel injection and 9.1:1 compression ratio

Usage:

  • Subaru Justy "J12"
  • Subaru Libero "E12"

Power:

  • 80 bhp (60 kW; 81 PS) with multi-point fuel injection

Usage:

  • Subaru Tutto (Taiwan)
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Related

Related items
Subaru Sumo | Subaru Libero | Subaru Justy | Subaru related | Petrol Engines | Straight 3 Engines

Technical

Technical
  • Subaru EF engine Technical details and specifications (1984-)

    Subaru Engine code: EF10

    No. of cylinders 3/OHC
    Capacity 997cc
    Firing order 1-3-2
    Compression ratio 9.5:1
    Suitable for unleaded petrol Yes
    Fuel system Make Zenith Type 26-30
    Fuel system pressure 0.09-0.14 bar
    Oil pressure 3.3 bar @ 3000 rpm
    Thermostat opens 84-86 °C
    Maximum cranking amps 97-119A
    Regulated voltage 14.2-14.8V

    © Motor car History

     

Service

Service
  • Subaru EF engine Service Guide (1984-)

    Subaru Engine code: EF10

     
    Distributor Contact breaker gap 0.45-0.55 mm
    Spark plugs Electrode gap 0-9-1.1mm
    Spark plugs Tighten 18-24 Nm
    Spark plugs Original equipment NGK BPR6ES-11
    Spark plugs Make Bosch WR7DC
    Spark plugs Make Champion RN9YCC4
    Spark plugs Make NGK BPR6ES-11
    Valve clearance -INLET 0.13-0.17 mm check cold
    Valve clearance -EXHAUST 0.23-0.27 mm check cold
    Drive belt size - alternator 9.5x675mm
    Engine oil grade - moderate climate 10W/30 SAE or 20W/50 SAE
    Engine oil change 3.0 litres
    Manual gearbox oil grade 80W/90 SAE
    Manual gearbox oil 2.8 litres
    Cooling system 4.6 litres

    © Motor car History

Manuals

Download: Workshop manuals Tech Guides exclusive to registered users.

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