EJ22 Engine Review

EJ22 Engine

The 2.2 liter engine was released in 1990 as engine for new Subaru model - Legacy. EJ family was more expanded by 1.8 liter engine EJ18.

The first was EJ22E engine. It is all USDM natural aspirated 2.2-liter engines from 1990 to 1996. The engine is four-cylinder boxer gasoline engine with aluminum cylinder block and cast iron sleeves installed inside. It got SOHC aluminum heads and belt driven camshafts. The compression ratio of early EJ22 is 9.5:1. In 1997 the engine received some updates. There are solid lifters (the adjustment of valve train is set at 100,000 miles), the roller rocker cam follower system, single-port exhaust and 9.7:1 compression ratio. The main target was the engine friction reduction to increase the power and reduced fuel consumption. The engine got pistons coated with molybdenum and reshaped. The weight of new pistons was reduced by approximately 100 grams. The intake manifold has been reshaped to increase the airflow mass and speed.
1996 was a transition year and often EJ22E already was equipped by new parts from EJ22EZ (solid tappets or lifters for example). But as the EJ22E as the EJ22EZ belongs to phase 1.

EJ222/EJ223 is from 99-01. The big changes were in 1999. From this year 2.2 liter engine has the Phase 2 design and EZ stuff also. The main feature is a new SOHC cylinder heads with the valves positioned at a larger angle (the intake valves positioned 23 degrees off-center, the exhaust valves - 20 degrees off-center) and the camshaft bolted to the cylinder head with the camcase.

Let's pay attention on turbocharged versions of the EJ22. The EJ22T is 91-94 USDM Legacy Turbo engine. The power is 165 hp. It has SOHC aluminum cylinder heads, oil sprayer inside the block, fully closed deck and no intercooler.

The EJ22G is JDM engine based on EJ20K STI engine. It shares DOHC cylinder heads and turbocharger with EJ20K but uses 2.2l cylinder block without oil sprayers to cool the pistons. There are forged pistons and stock connecting rods. Compression ratio is 8.0:1. Its power is 280 hp at 6000 rpm and 268 lb ft of torque at 3200 rpm. This engine was built for Impreza STi 22B GC8 series.

Engine Specs

Manufacturer
Subaru
Year
1990-2001
Cylinder Block Material
Aluminum
Fuel system
Fuel injection
Configuration
Flat-4 (opposed)
Number of cylinders
4
Valves per cylinder
4
Stroke, mm
75.0
Bore, mm
96.9
Compression Ratio
9.5 (EJ22E)
9.7 (EJ2EZ/EJ222/EJ223)
Displacement, cc
2212
Power, hp
135/5500 (EJ22E)
137/5800 (EJ22EZ
144/5600 (EJ222/EJ223)
165/5800 (EJ22E)
280/6000 (EJ22G)
Torque, lb ft
137 (186 Nm)/4800 (EJ22E)
137 (187 Nm)/4800 (EJ22EZ)
149 (202 Nm)/3600 (EJ222/EJ223)
268 (363 Nm)/3200 (EJ22G)
Engine weight
265 lbs (120 kg)
Engine oil viscosity
10W30, 10W40, 5W30 (low winter temperatures)
Engine oil capacity, liter
4.5
Oil change interval, mile
9,000 (15,000 km) or 12 month
Oil consumption per 1000 miles as normal
Applications
Legacy 90-99, Outback 95-96, Impreza 95-01

EJ22 engine Problems and Reliability

The EJ22 is probably the most reliable Subaru engine with very bulletproof block. The engine life is more than 250,000-300,000 miles. There are many cases when these engines run more than 500,000 miles mileage without serious problems.

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