Subaru EA engine

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Subaru EA engine
Subaru EA82 Leone 1989.jpg
Overview
Manufacturer Subaru
Production 1966–94
Combustion chamber
Configuration flat-4 petrol engine
Valvetrain OHV/SOHC
Combustion
Fuel type Petrol/gasoline
Cooling system water
Chronology
Successor Subaru EJ engine

The Subaru EA engine is a series of automobile internal combustion engines manufactured by Subaru, a division of Fuji Heavy Industries. All EA series engines are of a flat-4 design, and have always been water cooled.

The EA series engines have aluminum heads with aluminum blocks. Each cylinder has two valves, one for exhaust and one for intake. They came in either an OHV pushrod or SOHC configuration.

Subaru produced the EA series from 1966 to 1994, and were found in the Subaru FF-1 and the Subaru Leone.

EA-52[edit]

The Subaru EA-52 engine was produced from 1966 until 1970.

Specifications[edit]

  • Displacement: 977.2 cc
  • Bore: 72 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 55 bhp (41 kW; 56 PS) at 6,000 rpm
  • Torque: 57 lb·ft (77 N·m) at 3,200 rpm
Found on

EA-53[edit]

The Subaru EA-53 was used in the 1967 Subaru 1000 Sports Sedan, sold in Japan. It used twin carburetors. This engine was used in the September 1968 Japan Alpine Rally which the car won in the 1000cc engine class.

Specifications[edit]

  • Displacement: 977.2 cc
  • Bore: 72 mm
  • Stroke: 60 mm
  • Compression Ratio: 10:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 67 PS (49 kW; 66 bhp) at 6,600 rpm
  • Torque: 8.2 kg·m (80 N·m; 59 lb·ft) at 4,600 rpm

EA-61[edit]

Subaru EA61 1.1L

The Subaru EA-61 engine was produced from 1969 to 1972. The Japanese-spec Subaru FF-1 Sport Sedan and the FF-1 Super Touring sedan used twin carburetors, with the engine designation EA-61S. It was sold in the United States only for the 1971 model year.[1] It was also briefly available in the first Leone, only in 1100 Van specification.

Specifications[edit]

  • Displacement: 1088 cc
  • Bore: 76 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.5:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 61 bhp (45 kW; 62 PS) at 5,600 rpm
  • Torque: 65 lb·ft (88 N·m) at 4,000 rpm
Found on

EA-62[edit]

The Subaru EA-62 engine was produced from 1971 to 1972. It is the only EA- engine with rear-facing exhaust ports.

Specifications[edit]

  • Displacement: 1267.5 cc
  • Bore: 82 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 80 bhp (60 kW; 81 PS) at 6,400 rpm
  • Torque: 73 lb·ft (99 N·m) at 4,000 rpm
Found on

EA-62S[edit]

This engine used twin carburetors from Zenith-Stromberg.

  • Displacement: 1267.5 cc
  • Bore: 82 mm
  • Stroke: 60 mm
  • Compression Ratio: 10.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 93 PS (68 kW; 92 bhp) at 7,000 rpm
  • Torque: 10.5 kg·m (103 N·m; 76 lb·ft) at 5,000 rpm
Found on

EA-63[edit]

The Subaru EA-63 engine was produced from 1973 to 1979, although it stopped being used in US-market cars in 1976.

Specifications[edit]

  • Displacement: 1361 cc
  • Bore: 85 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.5:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 58 bhp (43 kW; 59 PS) at 5200 rpm
72 PS (53 kW) at 6000 rpm (JDM, emissions cleaned)[2]
78 PS (57 kW) at 6000 rpm (JDM, no emissions equipment)[2]
  • Torque: 68 lb·ft (92 N·m) at 2,400 rpm
10.2 kg·m (100 N·m; 74 lb·ft) at 3600 rpm (JDM, emissions cleaned)[2]
10.5 kg·m (103 N·m; 76 lb·ft) at 4000 rpm (JDM, no emissions equipment)[2]
Found on

EA-64[edit]

The Subaru EA-64 engine was produced from 1973 to 1979. The engine disappeared from the sedan catalogs in September 1975, as the new emissions regulations would simply make the car too slow. As commercial vehicles didn't have to meet the new stricter regulations, it continued to be available in the Van 1200 Standard until the end of production of the first generation Leone in 1979.

Specifications[edit]

  • Displacement: 1176 cc
  • Bore: 79 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV
  • Horsepower: 68 PS (50 kW) at 6000 rpm[2]
  • Torque: 9.5 kg·m (93 N·m; 69 lb·ft) at 3600 rpm
Found on

EA-65[edit]

The Subaru EA-65 engine was produced from 1979 to 1994.

Specifications[edit]

  • Displacement: 1,298 cc
  • Bore: 83 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 65 bhp (48 kW; 66 PS) at 5,600 rpm
  • Torque: 85 lb·ft (115 N·m) at 3,200 rpm
Found on
  • 1979-1994 Subaru Leone for Japanese domestic market, Europe, and Latin America.

EA-71[edit]

The Subaru EA-71 engine was produced from 1976 to 1994, and was a redesign of the EA-63 block. Sales in the US ended in 1987.

Subaru EA-71 Engine

Specifications[edit]

  • Displacement: 1595 cc
  • Bore: 92 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower:
1976-1979: 67 bhp (50 kW; 68 PS) at 5,200 rpm (US)
82 PS (60 kW) at 5,600 rpm (JDM, emissions cleaned)
95 PS (70 kW) at 6,400 rpm (JDM twin-carb, emissions cleaned)
87 PS (64 kW) at 5,600 rpm (JDM, no emissions equipment)
1980-1987: 68 bhp (51 kW; 69 PS) at 4,800 rpm (US)
  • Torque:
1976-1979: 81 lb·ft (110 N·m) at 2,400 rpm (US)
12.0 kg·m (118 N·m; 87 lb·ft) at 3,600 rpm (JDM, emissions cleaned)
12.3 kg·m (121 N·m; 89 lb·ft) at 4,000 rpm (JDM twin-carb, emissions cleaned)
12.3 kg·m (121 N·m; 89 lb·ft) at 3,600 rpm (JDM, no emissions equipment)
1980-1987: 84 lb·ft (114 N·m) at 2,800 rpm (US)
Found on

EA-72 Concept Engine[edit]

There was an unreleased EA-72 concept engine Subaru developed for use in the Japanese Market in 1989. It was essentially an EA-82 with an EA-71 crankshaft. This engine never came about as the Subaru EJ15 and EJ16 were already in development for this purpose.

Specifications[edit]

  • Displacement: 1,595 cc
  • Bore: 92 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.7:1
  • Valvetrain: SOHC
  • Horsepower: unreleased
  • Torque: unreleased

EA-81[edit]

The Subaru EA-81 engine was produced from 1980 to 1989 and is a stroked version of the EA-71.

Specifications[edit]

  • Displacement: 1,781 cc
  • Bore: 92 mm
  • Stroke: 67 mm
  • Compression Ratio: 8.7:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 73 bhp (54 kW; 74 PS) at 4,800 rpm
  • Torque: 94 lb·ft (127 N·m) at 2,400 rpm
Found on

EA-81T[edit]

The EA-81T is not an official engine designation from Subaru. The "T" is used informally to refer to the turbocharged version of EA-81 engines that are equipped with a turbocharger and multi port fuel injection.

Additional specifications
  • Compression Ratio: 7.7:1
  • Turbocharger Pressure: 7 psi
  • Valvetrain: OHV Pushrod
  • Horsepower: 95 bhp (71 kW; 96 PS) at 4,200 rpm (US)
  • Torque: 123 lb·ft (167 N·m) at 2,800 rpm (US)
Found on

EA-82[edit]

The Subaru EA-82 engine was produced from 1985 to 1994. It came with a carburetor, single point fuel injection, or multi port fuel injection. Most of the technical advancements introduced to the EA82 were utilized in the Subaru EJ engine, specifically, the SOHC valvetrain, and multi-point fuel injection.

Specifications[edit]

Subaru EA-82 Engine (displayed upside-down)
  • Displacement: 1781 cc
  • Bore: 92 mm
  • Stroke: 67 mm
  • Compression Ratio: 8.7:1 or 9.0:1 SPFI According to Subaru Factory Service manuals: 9.0:1 "carb" 9.5:1 SPFI
  • Valvetrain: SOHC
  • Horsepower:
    Carb - 84 bhp (63 kW; 85 PS) at 5,200 rpm
    SPFI - 90 bhp (67 kW; 91 PS) at 5,600 rpm
    MPFI - 97 bhp (72 kW; 98 PS) at 5,200 rpm
  • Torque:
    Carb - 101 lb·ft (137 N·m) at 3,200 rpm
    SPFI - 101 lb·ft (137 N·m) at 3,200 rpm
    MPFI - 103 lb·ft (140 N·m) at 3,200 rpm
Found on

EA-82T[edit]

The EA-82T engine was introduced in 1985 for the GL-10 models, and later on RX Coupe models. It is a turbocharged version of the MPFI EA-82 with modified cylinder heads and lower compression pistons.

Additional specifications
  • Turbo: IHI model RHB5 VF7
  • Compression Ratio: 7.7:1
  • Turbocharging Pressure: 7 psi
  • Horsepower:
    1985-1986: 111 bhp (83 kW; 113 PS) at 5,200 rpm
    1987-1990: 115 bhp (86 kW; 117 PS) at 5,200 rpm
  • Torque: 134 lb·ft (182 N·m) at 2,800 rpm

ER27[edit]

Subaru ER engine
Overview
Manufacturer Subaru
Production 1988–1991
Combustion chamber
Configuration flat-6 petrol engine
Displacement 2.7 L (2672 cc)
Cylinder bore 92 mm
Piston stroke 67 mm
Cylinder block alloy aluminium
Cylinder head alloy aluminium
Valvetrain SOHC
Combustion
Fuel type Petrol/gasoline
Output
Power output 112 kW (150 hp)
Chronology
Successor Subaru EG engine

The ER series is a flat-6 engine with a displacement of 2.7L manufactured by Subaru, a division of Fuji Heavy Industries. The ER series has aluminium engine blocks and aluminium cylinder heads. It is found on the 1988-1991 Subaru Alcyone VX (XT-6 in the United States).

Created as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER series engine in 1988 exclusively to be featured in the Subaru Alcyone VX. Like the EA series engines, the ER series engine featured 2-valve cylinder heads with hydraulic lash adjusters and the block shared the same bore and stroke. While recognised as bearing many similarities to the Subaru EA82 engine, there are numerous differences in design between the two engines and a large portion of parts are unique to the ER27. The oil and water pumps are unique to the ER27, sharing similar bolt patterns and design to the EA82, but being of a higher flow in both cases.[3] The intake manifold uses a two piece design with a lower section bolting to the heads containing the coolant bridge, injectors and various vacuum lines. The upper intake manifold then bolts to the lower section and is unlike the EA82 or EJ22 "spider" manifold designs in that there is no central plenum chamber. The valve timing system is belt-drive using two individual timing belts, curiously one belt uses a spring tensioner (like the EA82) whilst the other uses a hydraulic tensioner (like the EJ22). Both JDM and USDM versions of the ER27 used multi-point electronic fuel injection. The ER27 designation was the first time Subaru incorporated the engine's displacement into the series name and all future engines have retained this nomenclature.

References[edit]

  1. ^ Flammang, James M. (1994). Standard Catalog of Imported Cars, 1946-1990. Iola, WI: Krause Publications, Inc. p. 588. ISBN 0-87341-158-7. 
  2. ^ a b c d e f 新型Subaru Leone (catalog) [New Subaru Leone] (in Japanese), Fuji Heavy Industries, June 1978 
  3. ^ "Oil Pump & Water Pump differences EA82->ER27". March 16, 2010. Retrieved 2011-05-06. 
  • 1977 Subaru Factory Service Manual
  • 1983 Subaru Factory Service Manual
  • 1984 Subaru Factory Service Manual
  • 1987/1988 Subaru Factory Service Manual
  • Subaru Drive Magazine