Item ID: 254162
Product Code: EJ253 AVLS
Serial Number: EJ253 D349837
Year: 2006-2010
Mileage: 60,000 miles
Applications:

Fitment Table

What engine is this?

This listing includes a JDM Subaru EJ253 2.5L naturally aspirated SOHC boxer engine with AVLS. J-Spec Auto identifies this specific inventory unit as Item ID 254162 with serial EJ253 D349837.

What does AVLS mean on an EJ253?

AVLS stands for Active Valve Lift System. Subaru uses AVLS to change valve operation according to engine operating conditions.

Will this EJ253 fit a 2006–2010 Subaru Forester?

This engine targets select 2006–2010 Subaru Forester 2.5L applications. However, Subaru engine configurations can vary, so compare your original engine and verify compatibility before ordering.

Will this EJ253 fit a Subaru Legacy?

This engine targets select 2006–2010 Subaru Legacy 2.5L applications. Nevertheless, verify the exact engine configuration and external components before purchase.

Will this EJ253 fit a Subaru Impreza?

This engine targets select 2006–2010 Subaru Impreza 2.5L applications. Compare your original engine with the product photos and confirm fitment before ordering.

Is this EJ253 turbocharged?

No. This EJ253 is a naturally aspirated 2.5L engine.

Has this engine been compression tested?

Yes. J-Spec Auto lists this specific EJ253 as compression tested and provides a test-video link on the product page.

How many miles are on this EJ253?

J-Spec Auto lists approximately 60,000 miles for this engine.

Should I keep my original Subaru engine?

Yes. Keep your original engine until installation is complete because your mechanic may need to transfer vehicle-specific external components.

Does this engine have a warranty?

Yes. J-Spec Auto currently includes a 90-day warranty with Item ID 254162.

What should I replace before installing a used JDM Subaru EJ253 engine?

Before installation, J-Spec Auto Sports recommends replacing normal service and wear items while the engine remains easily accessible. Doing this before installation can save labor later and help prepare the replacement engine for reliable operation.

Depending on the application and service history, your technician should inspect and replace the following as needed:

• Timing belt
• Timing belt tensioner
• Timing idler pulleys
• Water pump
• Thermostat
• Valve cover gaskets
• Camshaft seals
• Crankshaft seal
• Intake and exhaust gaskets
• Other accessible engine gaskets and seals
• Spark plugs
• Ignition components as needed
• Accessory belts
• Engine oil and oil filter
• Coolant

Additionally, inspect all hoses, pulleys and other wear items before installation. Do not rely on used timing, ignition or maintenance components simply because they arrive attached to the replacement engine.

Should I replace the timing components before installing an EJ253?

Yes. J-Spec Auto Sports recommends servicing the timing belt system before installation, especially when the service history of a used imported engine is unknown.

At minimum, inspect or replace the timing belt, tensioner and idler pulleys. In addition, consider replacing the water pump and accessible camshaft and crankshaft seals while the engine remains outside the vehicle.

Completing this maintenance before installation usually requires much less labor than performing the same service after the engine enters the vehicle.

Should I replace the gaskets and seals on a JDM EJ253?

Yes. We recommend replacing accessible service gaskets and seals before installation rather than relying on used components of unknown age.

For example, inspect or replace the valve cover gaskets, camshaft seals, crankshaft seal, intake gaskets, exhaust gaskets and other accessible seals as appropriate for the application.

Your technician should also inspect the engine for signs of leakage before installation.

Should I replace the spark plugs and ignition components?

Yes. Install new spark plugs and inspect the ignition system before starting the replacement engine.

Additionally, check the ignition coils, electrical connectors and related components. Replace worn or questionable ignition components as needed.

Starting a replacement engine with properly serviced ignition components also makes initial startup and diagnosis easier.

How should I prime the EJ253 engine before the first startup?

Do not immediately start a replacement engine after installation without first establishing oil circulation.

Before initial startup, fill the engine with the correct type and quantity of engine oil and install a new oil filter. Next, disable fuel and ignition so the engine cannot start.

Then, crank the engine in short intervals to circulate oil through the lubrication system. Allow the starter to cool between cranking intervals.

Your technician should confirm proper oil circulation and oil-pressure operation before enabling fuel and ignition. Once confirmed, reconnect the required systems and proceed with the initial startup.

Never run or rev the engine without confirmed lubrication.

How should I bleed the cooling system after installing an EJ253?

Thoroughly bleeding the Subaru cooling system after engine installation is extremely important. Air trapped in the cooling system can interfere with coolant circulation and may contribute to overheating.

Fill the cooling system with the correct coolant according to Subaru service procedures. Then, bleed the system thoroughly while monitoring coolant level and engine temperature.

As the thermostat opens and coolant circulates, continue checking for trapped air. Also, verify heater operation, radiator-fan operation and stable engine temperature.

After the engine completely cools, recheck the coolant level and inspect the entire system for leaks. Do not consider the installation complete until the technician confirms that the cooling system contains no trapped air and operates correctly.

What should I check during the first startup of a replacement EJ253?

During the initial startup, monitor the engine carefully. In particular, check:

• Oil-pressure operation
• Coolant temperature
• Coolant circulation
• Oil leaks
• Coolant leaks
• Fuel leaks
• Unusual engine noises
• Misfires
• Warning lights
• Charging-system operation
• Radiator-fan operation
• Heater operation

Furthermore, avoid immediately revving or heavily loading the engine. Instead, allow the technician to confirm proper operation and check for leaks or abnormal conditions.

After the engine reaches operating temperature and subsequently cools completely, recheck the engine oil and coolant levels.

What installation steps does J-Spec Auto Sports recommend for a replacement EJ253?

For the best installation outcome, J-Spec Auto Sports recommends having a qualified technician:

1. Compare the replacement EJ253 with the original engine before installation.
2. Transfer the required vehicle-specific components from the original engine.
3. Replace appropriate gaskets, seals and maintenance items.
4. Service the timing belt system and inspect or replace the water pump.
5. Install new spark plugs and inspect the ignition components.
6. Install fresh engine oil and a new oil filter.
7. Prime the lubrication system before the first startup.
8. Fill and thoroughly bleed the cooling system.
9. Confirm proper oil pressure, coolant circulation and operating temperature.
10. Check carefully for oil, coolant and fuel leaks.
11. Scan for diagnostic trouble codes and correct any installation-related issues.
12. Recheck all fluid levels after the engine reaches operating temperature and completely cools.

Important: Always follow the applicable Subaru factory service procedures and J-Spec Auto Sports warranty requirements. A qualified automotive technician should perform the installation.