JDM 2010–2012 Subaru Legacy GT EJ255 2.5L Turbo Engine – Dual AVCS, Compression Tested

Replace your worn, damaged, knocking, or failed Subaru Legacy GT engine with this low-mileage JDM EJ255 2.5L turbo engine from J-Spec Auto Sports.

This EJ255 features a turbocharged 2.5L horizontally opposed Boxer design with DOHC Dual AVCS. Therefore, it provides the correct basic engine architecture for compatible 2010–2012 Subaru Legacy GT applications.

Before we offer an engine for sale, our technicians inspect and compression test it. In addition, this specific engine has actual product photos and a compression-test video available. As a result, buyers can review more than generic stock photos before ordering.

Because JDM and USDM EJ255 configurations can differ, installers should use this engine primarily as a replacement long block. Therefore, your technician may need to transfer specific components from the original USDM Legacy GT engine.

Engine at a Glance

• Engine Code: EJ255
• Engine Serial Number: EJ255 E167778
• Displacement: 2.5L / 2,457cc
• Configuration: Horizontally Opposed Boxer 4-Cylinder
• Aspiration: Turbocharged
• Valvetrain: DOHC
• Variable Valve Timing: Dual AVCS
• Timing System: Timing Belt
• Fuel Type: Gasoline
• Application: Compatible 2010–2012 Subaru Legacy GT 2.5L Turbo
• Mileage: Approximately 45,000–60,000 Miles
• Condition: Used JDM Engine
• Testing: Compression Tested
• Evidence: Actual Engine Photos and Compression-Test Video
• Installation Type: Replacement Long Block
• Nationwide Freight Shipping Available
• Professional Installation Available
• VIN Verification Recommended

2010–2012 Subaru Legacy GT Compatibility

This JDM EJ255 is intended as a replacement long block for compatible:

• 2010 Subaru Legacy GT 2.5L Turbo
• 2011 Subaru Legacy GT 2.5L Turbo
• 2012 Subaru Legacy GT 2.5L Turbo

However, Subaru used several EJ255 configurations across different vehicles and production years. Therefore, do not assume that every EJ255 engine offers complete plug-and-play interchangeability.

Before ordering, provide your 17-digit VIN so our team can help review the application.

Important JDM-to-USDM Installation Information

Use this JDM EJ255 primarily as a replacement long block.

In other words, your technician should not assume that every component attached to the Japanese-market engine will directly connect to your USDM Legacy GT.

Depending on the application, your installer may need to transfer components such as:

• USDM engine wiring harness
• Intake manifold
• Throttle body
• Fuel rail
• Fuel injectors
• Engine sensors
• Exhaust manifold
• Turbo-related components
• Emissions equipment
• Engine mounts
• Flywheel
• Alternator
• A/C compressor
• Accessory brackets
• Oil pan where required
• Oil pickup where required
• Coolant fittings
• Vacuum hoses
• Other USDM-specific components

Most importantly, compare the original engine with the replacement engine before installation.

By doing so, your technician can identify differences before the engine enters the vehicle.

Keep Your Original Engine

Do not dispose of your original Legacy GT engine until the replacement engine has been completely installed and tested.

Instead, keep the original engine nearby throughout the installation.

Your technician may need sensors, brackets, manifolds, hardware, hoses, fittings, accessories, or other vehicle-specific components.

Therefore, keep the original engine until the replacement engine starts correctly, reaches operating temperature, and completes a successful road test.

What Is Included?

This listing primarily covers the JDM Subaru EJ255 2.5L turbo engine long-block assembly.

Some accessories may remain attached to the engine. However, unless we specifically list an accessory as included and covered, consider attached accessories convenience items.

Therefore, review the actual product photos before ordering.

The photos show the physical engine and the components attached to the specific unit being offered for sale.

Compression Tested Before Sale

At J-Spec Auto Sports, our technicians inspect and compression test this EJ255 before sale.

Compression testing helps us evaluate cylinder sealing and provides useful information about the engine’s internal condition.

In addition, we inspect major external areas for visible problems.

Our inspection may include:

• Cylinder compression
• Cylinder heads
• Engine block
• Valve covers
• Timing covers
• Oil pan
• External seals
• Mounting points
• Visible leaks
• Physical damage

However, compression testing represents only one part of evaluating a replacement engine.

Proper installation also plays a major role in engine reliability. Therefore, your installer should follow correct procedures for lubrication, cooling, timing-system service, component transfer, and initial startup.

Actual Compression-Test Video

This specific EJ255 has a compression-test video available.

The video provides additional first-hand information about the actual engine offered on this page rather than relying only on generic engine specifications.

Engine Serial Number: EJ255 E167778

When available, review the compression-test video along with the actual product photos before purchasing.

Recommended Maintenance Before Installation

Replacing an EJ255 requires significant labor. Therefore, performing preventive maintenance while the engine remains outside the vehicle can save time and money later.

We strongly recommend inspecting or replacing the following items as needed:

• Timing belt
• Timing belt tensioner
• Timing belt idlers
• Water pump
• Thermostat
• Camshaft seals
• Front crankshaft seal
• Rear main seal
• Valve cover gaskets
• Spark plugs
• PCV valve
• Accessory belts
• Engine oil
• Oil filter
• Coolant
• Coolant hoses
• Vacuum hoses

Additionally, inspect the turbocharger and lubrication system carefully before installation.

Because access is easier while the engine remains outside the vehicle, this is the best time to address questionable maintenance items.

Timing Belt Service Is Strongly Recommended

The Subaru EJ255 uses a timing belt.

Therefore, if the service history of the timing components remains unknown, consider servicing the complete timing system before installing the engine.

Inspect or replace:

• Timing belt
• Timing belt tensioner
• Timing belt idlers
• Water pump
• Camshaft seals
• Front crankshaft seal

A timing-system failure can cause severe engine damage.

Consequently, preventive timing service can protect the labor and money invested in the replacement engine.

Inspect the Water Pump and Thermostat

Inspect the water pump carefully before installation.

If the pump shows leakage, bearing play, noise, corrosion, or other signs of wear, replace it while the engine remains accessible.

Additionally, inspect or replace the thermostat when its condition or service history remains unknown.

A properly functioning cooling system is critical for a turbocharged Subaru engine.

Therefore, correct any existing cooling-system problems before starting the replacement engine.

Turbocharger Inspection

Because the EJ255 is turbocharged, inspect the turbocharger before installation.

Check:

• Compressor wheel condition
• Turbine condition
• Shaft play
• Turbo housing
• Oil leakage
• Wastegate operation
• Oil feed connection
• Oil return connection

Do not assume that an attached used turbocharger is automatically ready for service.

Furthermore, unless the listing specifically states otherwise, consider an attached turbocharger a convenience item rather than part of the guaranteed engine long block.

Inspect the Turbo Oil Feed and Return System

Proper turbocharger lubrication is extremely important.

Therefore, inspect the turbo oil feed line and oil return system before starting the replacement engine.

Check for:

• Restrictions
• Sludge
• Metal contamination
• Damaged fittings
• Kinked lines
• Leaks
• Blocked passages

If the original engine failed because of bearing damage, oil starvation, or internal metal contamination, take additional precautions before reusing oil-system components.

Important Warning After a Spun Bearing or Rod-Bearing Failure

If your original EJ255 suffered a spun bearing, rod-bearing failure, or severe internal engine damage, do not simply transfer contaminated components to the replacement engine.

Metal particles from the failed engine may remain inside parts of the lubrication system.

Therefore, carefully inspect:

• Turbocharger
• Turbo oil lines
• Oil cooler
• Oil pan
• Oil pickup
• Related oil passages
• Reusable lubrication components

Clean or replace contaminated components as necessary.

Otherwise, metal debris from the original engine could circulate through the replacement engine and cause additional damage.

Inspect the Oil Cooler

If the original engine experienced bearing failure or metal contamination, pay special attention to the oil cooler.

An oil cooler may retain metallic debris from the damaged engine.

Therefore, inspect, clean, or replace the oil cooler as appropriate before operating the replacement engine.

This step is especially important after a catastrophic internal engine failure.

Inspect the Oil Pickup

Inspect the oil pickup and oil pan before installation.

Make sure the pickup is:

• Clean
• Undamaged
• Free of restrictions
• Properly sealed
• Correct for the application

Turbocharged Subaru engines depend heavily on proper oil supply.

Therefore, never ignore questionable oil-system components during an engine replacement.

Install Fresh Spark Plugs

We recommend installing correctly specified new spark plugs during the engine replacement.

In addition, inspect:

• Ignition coils
• Coil connectors
• Wiring
• Spark plug wells

Because access is easier while the engine remains outside the vehicle, now is an ideal time to address worn ignition components.

Inspect Gaskets and Seals

Before installation, inspect all accessible gaskets and seals.

Pay particular attention to:

• Valve cover gaskets
• Camshaft seals
• Front crankshaft seal
• Rear main seal
• Oil pan sealing areas
• Coolant connections

If you find leakage or deterioration, replace the affected component before installing the engine.

As a result, you may avoid significant labor costs later.

Prime the Engine Before First Startup

Do not simply install the EJ255 and immediately start it.

Instead, prime the lubrication system before allowing normal combustion.

During storage and transportation, oil can drain away from internal engine passages. Therefore, proper priming helps establish oil circulation before internal components operate under normal loads.

Install the correct engine oil and a new quality oil filter.

Then follow proper service procedures to establish oil circulation before normal startup.

Most importantly, verify proper lubrication during initial operation.

Prime the Turbocharger

The turbocharger also requires proper lubrication.

Therefore, make sure the turbo receives oil before normal engine operation.

A dry turbocharger can suffer damage very quickly.

For that reason, technicians should verify the turbo oil supply during initial startup preparation.

Cooling-System Inspection

Before installing the replacement engine, inspect the entire cooling system.

Check:

• Radiator
• Water pump
• Thermostat
• Cooling fans
• Coolant hoses
• Expansion tank
• Heater circuit
• Coolant connections

If the original engine failed because of overheating, determine why it overheated before starting the replacement engine.

Otherwise, the same unresolved problem could damage the replacement engine.

Bleed the Cooling System Properly

After installation, properly fill and bleed the cooling system.

Air trapped inside the cooling system can interfere with coolant circulation. As a result, the engine may overheat even when the replacement engine itself has no internal problem.

During initial warm-up, monitor:

• Coolant temperature
• Coolant level
• Heater operation
• Cooling fan operation
• Coolant circulation
• Coolant leaks
• Warning lights

Additionally, monitor engine temperature closely during the first road test.

Never continue operating the engine if it begins to overheat.

Before First Startup

Before starting the replacement EJ255, your technician should:

1. Install fresh engine oil.
2. Install a new oil filter.
3. Verify the timing system.
4. Check the turbocharger.
5. Inspect turbo oil lines.
6. Inspect the oil pickup.
7. Verify all electrical connections.
8. Verify all engine grounds.
9. Check fuel connections.
10. Inspect vacuum lines.
11. Verify intake and intercooler connections.
12. Fill the cooling system.
13. Check coolant hoses.
14. Prime the engine lubrication system.
15. Prime the turbocharger.
16. Check for loose hardware or tools.
17. Start the engine and immediately inspect for problems.

Most importantly, stop the engine immediately if you detect abnormal oil pressure, severe noise, major leakage, or overheating.

Initial Startup Inspection

Once the engine starts, inspect the vehicle carefully.

First, check:

• Oil pressure
• Oil leaks
• Coolant leaks
• Fuel leaks
• Vacuum leaks
• Boost or intake leaks
• Abnormal engine noises
• Turbocharger noises
• Charging voltage
• Check-engine light
• Cooling-fan operation
• Engine temperature
• Idle quality

Next, allow the engine to reach normal operating temperature.

Afterward, shut the engine off and recheck all fluid levels.

Finally, perform a controlled road test.

After the road test, inspect the engine again for leaks, warning lights, abnormal noises, fluid-level changes, or other problems.

Common Reasons Legacy GT Owners Replace an EJ255

Subaru Legacy GT owners may need a replacement engine for several reasons.

For example:

• Rod-bearing failure
• Spun bearing
• Low compression
• Excessive oil consumption
• Overheating
• Piston damage
• Ringland damage
• Cylinder damage
• Oil starvation
• Timing-belt failure
• Turbo-related engine damage
• High mileage
• Internal engine knocking

In some cases, rebuilding the original engine makes sense.

However, a tested low-mileage JDM EJ255 can provide a practical alternative to rebuilding a severely damaged original engine.

Therefore, compare the complete rebuilding cost with the total cost of installing a tested replacement long block.

EJ255 Engine Specifications

• Engine Family: Subaru EJ
• Engine Code: EJ255
• Displacement: 2.5L / 2,457cc
• Configuration: Horizontally Opposed Boxer 4-Cylinder
• Cylinder Heads: Aluminum
• Engine Block: Aluminum
• Valvetrain: DOHC
• Variable Valve Timing: Dual AVCS
• Aspiration: Turbocharged
• Fuel Type: Gasoline
• Timing System: Timing Belt
• Cooling: Liquid Cooled

Are All EJ255 Engines Interchangeable?

No.

Subaru used the EJ255 engine code across several models and configurations.

However, differences may exist in:

• AVCS configuration
• Cylinder heads
• Intake manifold
• Turbocharger arrangement
• Exhaust system
• Oil pan
• Oil pickup
• Sensors
• Wiring
• ECU calibration
• Engine mounts
• Accessories
• Emissions equipment

Therefore, matching the engine code alone does not guarantee complete plug-and-play compatibility.

For this reason, use the JDM engine primarily as a replacement long block and transfer the required original components.

Can a WRX EJ255 Fit a Legacy GT?

Some Subaru models use related EJ255 engine architecture. However, complete engine configurations can differ significantly.

Therefore, do not assume that a WRX, Forester XT, Outback XT, or other EJ255 engine will directly replace a Legacy GT engine without modification.

Instead, compare the long-block configuration and transfer the required vehicle-specific components.

Contact J-Spec Auto Sports with your VIN if you need fitment assistance.

Nationwide Freight Shipping

J-Spec Auto Sports ships engines throughout the continental United States.

We secure engines to pallets and prepare them for freight transportation.

Delivery options may include:

• Automotive repair shops
• Commercial addresses
• Freight terminals
• Residential locations where freight service is available
• Local pickup from J-Spec Auto Sports

Therefore, contact our team if you need current freight information before ordering.

Inspect Your Engine at Delivery

Always inspect the shipment before signing for delivery.

In particular, check for:

• Broken pallet
• Crushed packaging
• Damaged timing covers
• Broken sensors
• Damaged valve covers
• Damaged oil pan
• Cracked accessories
• Broken mounting points
• Turbocharger damage
• Other visible freight damage

If you notice damage, take clear photographs immediately.

Additionally, document visible damage with the freight carrier whenever possible. Then contact J-Spec Auto Sports for assistance.

Engine Warranty

This engine includes a J-Spec Auto Sports engine warranty according to the warranty terms shown for this specific product.

Customers and installers should review the complete warranty requirements before installation.

Proper installation plays a major role in replacement-engine reliability. Therefore, follow correct procedures for:

• Timing-system service
• Engine lubrication
• Turbo lubrication
• Cooling-system service
• Correct component transfer
• Fresh fluids
• Initial startup
• Leak inspection
• Road testing

Additionally, repair any existing vehicle problem that could damage the replacement engine.

Why Buy Your Subaru EJ255 From J-Spec Auto Sports?

When purchasing a used JDM turbo engine, you are choosing more than a replacement long block.

You are also choosing the company that inspects, tests, stores, packages, ships, and supports the engine.

J-Spec Auto Sports offers:

• Genuine JDM Subaru engines
• Low-mileage engine options
• Compression-tested inventory
• Actual engine photos
• Actual compression-test video
• Engine serial identification
• Professional inspection
• VIN-based fitment assistance
• Nationwide freight shipping
• Local pickup
• Professional installation options
• Experienced JDM Subaru engine support

In addition, our team understands that JDM-to-USDM Subaru engine installations often require transferring vehicle-specific components.

Therefore, we encourage customers and repair shops to verify fitment before ordering.

Frequently Asked Questions

Will this EJ255 fit my 2010 Subaru Legacy GT?

This JDM EJ255 is intended as a replacement long block for compatible 2010 Subaru Legacy GT 2.5L turbo applications.

However, your technician may need to transfer USDM-specific components from the original engine.

Therefore, VIN verification is recommended before purchase.

Will this engine fit a 2011 Subaru Legacy GT?

This engine can serve as a replacement long block for compatible 2011 Legacy GT applications.

Nevertheless, compare the original engine with the JDM replacement before installation.

Will it fit a 2012 Subaru Legacy GT?

This listing targets compatible 2012 Subaru Legacy GT 2.5L turbo applications.

However, provide your VIN before ordering so our team can help verify the application.

Does this EJ255 have Dual AVCS?

Yes. This engine uses a DOHC Dual AVCS configuration.

Because EJ255 configurations vary, confirm that your application requires the appropriate setup before ordering.

Is this EJ255 plug-and-play?

Not necessarily.

JDM and USDM EJ255 configurations may use different external components.

Therefore, use this engine primarily as a replacement long block and transfer the required original components.

Are all EJ255 engines the same?

No.

Although several Subaru models use the EJ255 engine code, their configurations can differ.

For example, AVCS, turbocharger arrangement, oil pan, intake components, sensors, wiring, and accessories may vary.

Does the turbocharger come with the engine?

A turbocharger may appear attached in the product photographs.

However, consider attached accessories convenience items unless the listing or invoice specifically states that they are included and covered.

Is this engine compression tested?

Yes.

Our technicians compression test and inspect this EJ255 before sale.

In addition, an actual compression-test video is available for this specific engine.

What is the engine serial number?

The listed engine serial number is:

EJ255 E167778

Use the serial number along with the product photos and testing information to identify the specific engine.

How many miles are on this EJ255?

The listed mileage range is approximately 45,000–60,000 miles.

Please review the specific product information before ordering.

Does the EJ255 use a timing belt or chain?

The EJ255 uses a timing belt.

Therefore, inspect the complete timing system before installation.

Should I replace the timing belt before installation?

If the timing-belt service history remains unknown, we strongly recommend considering complete timing-system service while the engine remains outside the vehicle.

Inspect or replace the belt, tensioner, idlers, and water pump as needed.

Should I replace the water pump?

Inspect the water pump carefully.

If it shows leakage, bearing play, noise, or unknown service history, replacing it before installation may save substantial labor later.

Should I inspect the turbo before installation?

Yes.

Inspect the turbocharger for excessive shaft play, damaged wheels, oil leakage, housing damage, and other problems.

Additionally, inspect the turbo oil feed and return system.

What if my original EJ255 had a spun bearing?

Take additional precautions.

A spun bearing can send metallic debris through the engine lubrication system.

Therefore, inspect the turbocharger, oil lines, oil cooler, oil pan, oil pickup, and other reusable oil-system components before connecting them to the replacement engine.

Should I replace the oil cooler after bearing failure?

Inspect it carefully.

If the original engine suffered severe bearing damage or metal contamination, replacing a contaminated oil cooler may be safer than risking debris entering the replacement engine.

Should I inspect the oil pickup?

Yes.

Make sure the pickup is clean, undamaged, unrestricted, and properly sealed before installation.

Should I replace the spark plugs?

We recommend installing correctly specified new spark plugs.

Additionally, inspect the ignition coils and connectors while access remains easy.

Should I replace seals and gaskets?

Inspect all accessible seals and gaskets before installation.

If you find leakage or deterioration, replace the affected components while the engine remains outside the vehicle.

Should I prime the EJ255 before startup?

Yes.

Prime the lubrication system before allowing normal engine operation.

This step helps establish oil circulation before internal components operate under normal loads.

Should I prime the turbocharger?

Yes.

Make sure the turbocharger receives proper lubrication before normal engine operation.

A dry turbocharger can suffer damage quickly.

Do I need to bleed the cooling system?

Yes.

Properly filling and bleeding the cooling system is critical after an engine replacement.

Otherwise, trapped air can interfere with coolant circulation and cause overheating.

Should I keep my original engine?

Yes.

Keep your original engine until the replacement engine runs correctly and completes a successful road test.

That way, your technician can still access any sensors, brackets, hardware, fittings, or other components needed during installation.

Can J-Spec Auto Sports verify fitment?

Yes.

Provide your 17-digit VIN, vehicle year, model, and engine information before ordering.

Then our team can help review the application.

Can J-Spec Auto Sports install this engine?

Professional installation may be available through J-Spec Auto Sports.

Contact our team for current installation pricing and scheduling.

Order Your 2010–2012 Subaru Legacy GT EJ255 Engine

If your Legacy GT needs a replacement engine, this low-mileage JDM EJ255 2.5L turbo engine offers a practical replacement option for compatible applications.

Most importantly, this specific engine offers:

• EJ255 2.5L Turbo Configuration
• DOHC Dual AVCS
• Approximately 45,000–60,000 Miles
• Compression-Tested Condition
• Actual Engine Photos
• Actual Compression-Test Video
• Engine Serial Number EJ255 E167778
• Nationwide Freight Shipping
• VIN-Based Fitment Assistance

Therefore, if you need a 2010–2012 Subaru Legacy GT EJ255 engine for sale, contact J-Spec Auto Sports today.

For fitment assistance, provide your vehicle’s year, make, model, engine size, and 17-digit VIN before ordering.