Description
About This Engine
The Subaru EJ22 is a 2.2-liter horizontally-opposed flat-four boxer engine produced from 1990 through 2001, used primarily in the Subaru Legacy and Impreza for the North American market. It is widely regarded as the most reliable engine in Subaru's EJ family- a distinction it holds by a significant margin over the EJ25 that replaced it. The EJ22 produces 135 to 137 hp from 2.2 liters and is known for documented service lives exceeding 250,000 to 300,000 miles with regular maintenance. Some owners report 500,000-mile examples.
The EJ22 went through two distinct engineering phases. The Phase I EJ22E (1990 to 1996) used an open deck block design and 9.5:1 compression. Critically, it maintained enough valve-to-piston clearance to be a non-interference engine- if the timing belt breaks, the engine does not suffer valve damage. The Phase II EJ22EZ (1997 to 2001) received revised pistons with molybdenum coating, a higher 9.7:1 compression ratio, and a reshaped piston crown. This change eliminated the valve clearance and made the post-1997 EJ22 an interference engine. We confirm the generation before every order- this is the most important safety distinction for buyers.
The EJ22's reputation improvement over the EJ25 is relevant to mention for buyers making an informed decision. The 1999 to 2003 EJ25 (251 and 252 variants) has a documented and widely acknowledged head gasket failure rate- external oil and coolant seeping through the head gasket at the deck. The EJ22 does not share this characteristic. For Legacy and Impreza owners whose EJ25 has failed, an EJ22 replacement is worth discussing.
Signs You Need a Replacement Engine
- Oil or coolant external seepage at the head gasket junction- while less common than on the EJ25, it can occur on high-mileage or overheated EJ22 units
- Oil consumption beyond 1 quart per 2,000 miles- valve stem seal or ring wear on high-mileage engines
- Timing belt noise- the EJ22 uses a rubber timing belt. Pre-1997 units are non-interference (safe if belt breaks), post-1997 are interference. Replace at 60,000 to 105,000 miles.
- Rough idle- idle air control valve wear or mass airflow sensor fault on aged EJ22 units
- Loss of compression- ring wear or valve seat failure on high-mileage examples
- Boxer-specific oil leaks at camshaft seals or crankshaft seals- common on aged flat-four engines
Known Problems With This Engine
- Pre-1997 vs post-1997 interference status- the most critical safety distinction: The pre-1997 EJ22E is non-interference. The post-1997 EJ22EZ IS interference due to revised pistons. Installing a post-1997 unit and not replacing the timing belt immediately puts the owner at risk of valve damage from belt failure. We confirm the generation and interference status for every unit before shipping.
- EJ22T closed deck- better for boost, worse for accessibility: The EJ22T (1991 to 1994 Legacy Turbo) uses a closed deck block (stronger) with no intercooler from the factory. If sourcing an EJ22T for a turbocharged build, the absence of an intercooler from stock is a known limitation. We identify EJ22T vs EJ22E units before shipping.
- Timing belt system complexity on boxer engines: The EJ22's timing belt drives two camshafts on opposite sides of the engine- a more complex system than inline engines. The belt, tensioner, idler pulleys, and water pump should all be replaced together. We assess belt condition before shipping.
- Camshaft and crankshaft seal leaks: The boxer configuration places the cam seals horizontally, making oil pooling at the seals a chronic issue on high-mileage engines. We inspect the external seal areas before shipping.
- EJ22 vs EJ25 head gasket reputation context: The EJ22 does not share the EJ25's documented head gasket failure reputation. We verify head gasket condition (external seepage and coolant condition) before shipping and note the comparison for EJ25 replacement buyers.
Subaru EJ22 Family Variants
Three main EJ22 variants were produced across the engine's production life:
| Variant | Years | HP | Block | Key Notes |
|---|---|---|---|---|
| EJ22E (Phase I) | 1990 to 1996 | 135 hp | Open deck | Non-interference engine. 9.5:1 compression. Legacy and Impreza NA. Most common and most forgiving- broken belt does not destroy engine. |
| EJ22EZ (Phase II) | 1997 to 2001 | 137 hp | Open deck | Interference engine from 1997. 9.7:1 compression. Revised pistons with molybdenum coating. Slightly more power and better efficiency. |
| EJ22T | 1991 to 1994 | 160 to 165 hp | Closed deck | Legacy Turbo only- USDM. SOHC turbo, no intercooler from factory. 8.1:1 compression. Closed deck is stronger but no piston oil sprayers. Only 8,199 units in USDM. |
What Is Included- What Is Not Included
| INCLUDED- Long Block | Aluminum flat-four block with cast iron liners, crankshaft, pistons, connecting rods, SOHC camshafts (one per bank), aluminum cylinder heads, valve train, oil pan, timing cover. |
|---|---|
| NOT INCLUDED | Timing belt and tensioner (replace at installation- mandatory on any used EJ22), intake manifold, throttle body, fuel injectors, alternator, power steering pump, A/C compressor, ECU and wiring harness, axle stubs. |
| TIMING BELT NOTE | Replace timing belt, tensioner, all idler pulleys, and water pump at installation. Pre-1997 is non-interference. Post-1997 is interference- broken belt damages head. |
| Core Note | No core charge. You are not required to return your old engine. |
Vehicle Compatibility
The Subaru EJ22 was factory installed in the following vehicles:
| Subaru Legacy (1st and 2nd generation- NA) | 1990 to 1999- primary application |
|---|---|
| Subaru Legacy Turbo | 1991 to 1994- EJ22T closed deck turbocharged variant |
| Subaru Impreza | 1993 to 1996- NA EJ22E |
| Swap Applications | EJ22 is sometimes used as a head gasket failure replacement for EJ25-equipped Legacy and Impreza models, eliminating the EJ25's head gasket reputation in appropriate applications |
The EJ22 uses Subaru's standard boxer engine mounting dimensions and bellhousing pattern, making it compatible within the EJ-series vehicle lineup. For EJ25-to-EJ22 swaps (replacing a failed EJ25 with an EJ22), intake manifold and ECU compatibility should be verified- in many cases a compatible swap is straightforward. Call (240) 301-0095 with your chassis year and current engine and we will advise.
Transmission compatibility: Subaru 5EAT 5-speed automatic | Subaru TY755 5-speed manual | Subaru 5MT various- all Subaru transmissions from the early 1990s through early 2000s are broadly compatible with the EJ22 bellhousing pattern.
Not sure if this fits? Call (240) 301-0095. We verify fitment before every order ships.
Common Names and Search Terms
| Subaru EJ22 | Most common buyer search |
|---|---|
| EJ22 engine | Short code buyer |
| Subaru 2.2L engine | Displacement buyer |
| EJ22E | Phase I specific buyer |
| Legacy 2.2 engine | Application buyer |
| Subaru boxer engine 2.2 | Configuration buyer |
| EJ22 non-VTEC Subaru | Comparison-aware buyer |
| EJ22 flat four | Architecture buyer |
| Subaru 2.2 replacement | Replacement buyer intent |
| EJ22 vs EJ25 | Comparison research buyer- very high intent |
Used OEM vs Rebuilt- Which Is Right for You?
Used OEM is the right choice for a Legacy or Impreza EJ22 replacement- particularly where a compression-tested unit with confirmed generation and interference status is needed. Our EJ22 units are documented with block generation, interference status, and head gasket condition assessed.
A rebuilt EJ22 makes sense for a high-mileage vehicle where fresh seals, timing belt system, and valve stem seals are desired throughout. Subaru EJ22 rebuild specialists can provide a unit with fresh tolerances. Call us and we can discuss current unit condition.
Condition and Inspection Process
- Compression test across all 4 cylinders- results per cylinder recorded and shared before shipping. Healthy EJ22 typically shows 175 to 195 psi across all cylinders.
- Block generation confirmed- pre-1997 (non-interference) or post-1997 (interference) documented before shipping. This is the most critical safety distinction.
- EJ22E vs EJ22T variant confirmed before shipping
- Head gasket condition assessed- external seepage at head-to-block junction inspected. Coolant inspected for oil contamination.
- Timing belt condition assessed- pre-interference or post-interference status noted, replacement recommended at installation
- Camshaft and crankshaft seal areas inspected for oil seepage
Mileage varies by unit. Where available from the donor vehicle we provide it. Where it cannot be confirmed, we disclose this before your order is placed.
Buyer Tips- What to Know Before You Order
- Replace the timing belt at installation: On any used EJ22, replace the timing belt, tensioner, idler pulleys, and water pump at installation. Pre-1997 units are non-interference so a broken belt does not cause valve damage- but a failed belt still strands you. Post-1997 units are interference- broken belt damages the head. Either way, replace it.
- EJ22 vs EJ25 for your application: If your vehicle came with an EJ25 and it has suffered head gasket failure, ask us whether an EJ22 is compatible with your chassis and ECU. The EJ22 eliminates the EJ25's head gasket reputation and is a legitimate upgrade in reliability terms. Intake manifold and ECU compatibility should be verified.
- Pre-1997 unit for maximum reliability: For a vehicle that will not be driven in consistently highway conditions requiring maximum efficiency, a pre-1997 EJ22E with non-interference timing is the most forgiving engine in the Subaru lineup. Broken timing belt does not destroy the engine.
- Oil type and intervals: Use full synthetic 5W-30 meeting Subaru's specifications. Change every 3,750 to 5,000 miles- more frequently than Subaru's stated interval for maximum longevity given the boxer layout's oil pooling characteristics.
- Cam seal replacement: At installation, replace the camshaft and crankshaft seals as preventive maintenance. On a boxer engine, cam seal leaks are annoying to find and fix after installation due to the horizontal engine layout.
Why Buy From Vaz Auto Solutions
- Pre-1997 vs post-1997 generation confirmed- interference status documented before you pay- the most critical EJ22 safety distinction
- EJ22E vs EJ22T variant confirmed
- Head gasket condition assessed- external seepage check and coolant contamination inspection
- Compression tested across all 4 cylinders- results shared before order confirmed
- EJ25 head gasket comparison addressed honestly- EJ22 reliability advantage explained
- No core charge- keep your old engine
- Free freight pallet delivery to all 50 states
- 15 day replacement warranty on internal engine defects
- Call (240) 301-0095- speak with someone who understands EJ22 generations, interference status, and the EJ22 vs EJ25 comparison
Andrew Thompson (verified owner) –
Vaz Auto Solutions provided a fantastic used Subaru EJ22 engine for my 1997 Legacy. The engine arrived quickly and in excellent condition. This durable 2.2L flat-four has been running smoothly and delivering great power. The knowledgeable team at Vaz Auto Solutions offered exceptional customer service throughout the process. If you need a reliable EJ22, definitely check out Vaz Auto Solutions.
Michael Wilson (verified owner) –
I’m thrilled with the used Subaru EJ22 engine I bought from Vaz Auto Solutions for my 1996 Impreza. The well-maintained engine arrived in excellent condition. This reliable 2.2L boxer engine has been running flawlessly, providing peppy performance. The helpful folks at Vaz Auto Solutions made the buying process a breeze. If you need a dependable EJ22, give Vaz Auto Solutions a try.
Matt S., Portland OR –
My EJ25 failed with a classic external head gasket seep at 148,000 miles. Rather than replace with another EJ25, I went with a Vaz EJ22. They confirmed it was a post-1997 interference unit and noted the timing belt showed age- replaced it at install along with the water pump. Compression came back 183 to 189 across all 4. Outback has been running flawlessly. Never going back to an EJ25.
Brian T., Seattle WA –
Replaced my original EJ22E. Vaz confirmed the pre-1997 non-interference generation which I specifically wanted for peace of mind. Compression was solid. One cam seal was seeping- disclosed before I bought and replaced at installation. Good engine and honest seller.