Subaru has made a name for itself by producing reliable and high-performance engines, and one such engine is the EJ253. The EJ253 is a popular engine found in many of Subaru’s vehicles, including the Impreza, Forester, and Legacy. In this article, we’ll take an in-depth look at the specifications, reliability, and problems of the Subaru EJ253 engine.
Engine specifications for Subaru EJ253 2.5 l
Modification without phasing system
| Displacement | 2457 cc |
| Power system | Injector |
| Engine power | 165 hp |
| Torque | 225 Nm |
| Cylinder block | Aluminum H4 |
| Cylinder head | Aluminum 16v |
| Cylinder diameter | 99.5 mm |
| Stroke | 79 mm |
| Compression ratio | 10 |
| Engine features | SOHC |
| Hydraulic compensators | No |
| Timing Chain/Belt | Belt |
| Variable Valve Timing (VVT) | No |
| Turbocharger | No |
| Oil capacity/Recommended oil | 4.2 l 5W-30 |
| Fuel type | Regular |
| Euro class | EURO 2/3 |
| Average lifespan | 275 000 km |
Modification with i-AVLS Phase Control System
| Displacement | 2457 cc |
| Power system | Injector |
| Engine power | 175 hp |
| Torque | 225 – 230 Nm |
| Cylinder block | Aluminum H4 |
| Cylinder head | Aluminum 16v |
| Cylinder diameter | 99.5 mm |
| Stroke | 79 mm |
| Compression ratio | 10 |
| Engine features | SOHC |
| Hydraulic compensators | No |
| Timing Chain/Belt | Belt |
| Variable Valve Timing (VVT) | i-AVLS |
| Turbocharger | No |
| Oil capacity/Recommended oil | 4.2 l 5W-30 |
| Fuel type | Medium/Plus |
| Euro class | EURO 3/4 |
| Average lifespan | 270 000 km |
The oil capacity, recommended oil type, and recommended oil change interval for your Subaru EJ253 engine
| Subaru EJ253 Engine Oil Information | |
|---|---|
| Oil Capacity | 4.4 Quarts |
| Recommended Oil Type | 5W-30 |
| Recommended Oil Change Interval | 7,500 miles or 6 months, whichever comes first |
It’s important to note that the recommended oil change interval may vary depending on driving conditions, so it’s always a good idea to consult your owner’s manual for more specific information.
Additionally, it’s recommended to use a high-quality synthetic or semi-synthetic oil to ensure the best performance and protection for your engine. Some popular brands of oils that are compatible with the EJ253 engine include Mobil 1, Castrol, and Valvoline.
When replacing your oil, be sure to also replace the oil filter to ensure optimal engine performance and longevity. Consult your owner’s manual or a qualified mechanic for specific instructions on how to perform an oil change on your Subaru EJ253 engine.
Fuel consumption for the Subaru EJ253 engine
| Model | City MPG | Highway MPG | Combined MPG |
|---|---|---|---|
| Subaru Impreza | 20 | 27 | 23 |
| Subaru Forester | 21 | 27 | 23 |
| Subaru Legacy | 19 | 25 | 22 |
Please note that these values may vary based on driving habits and conditions.
Which cars have the EJ253 2.5 l Engine
| Impreza 2 (GD) | 2003 – 2007 |
| Impreza 3 (GE) | 2007 – 2011 |
| Forester 2 (SG) | 2004 – 2007 |
| Forester 3 (SH) | 2007 – 2010 |
| Legacy 4 (BL) | 2003 – 2009 |
| Legacy 5 (BM) | 2009 – 2012 |
| Outback 3 (BP) | 2004 – 2009 |
| Baja 1 (BT) | 2005 – 2006 |
| 9-2X | 2005 – 2006 |
EJ253 engine problems
Head gasket failure
One of the most common issues with the EJ253 engine is head gasket failure. This can result in engine overheating, loss of coolant, and white smoke from the exhaust. If left untreated, head gasket failure can cause serious engine damage.
Oil leaks
Another common issue with the EJ253 engine is oil leaks. These can occur around the valve covers, oil pan, or timing cover. If left untreated, oil leaks can lead to low oil levels and engine damage.
Timing belt failure
The timing belt is a critical component of the EJ253 engine, and if it fails, it can cause serious engine damage. It’s important to replace the timing belt at the manufacturer’s recommended interval to avoid timing belt failure.
Piston ring failure
Piston ring failure is another issue that can occur with the EJ253 engine. This can cause low compression and loss of power. If left untreated, piston ring failure can lead to engine damage.
Subaru EJ253 engine reliability
Maintenance and care
Like any engine, the EJ253 requires regular maintenance and care to ensure it remains reliable. This includes regular oil changes, air filter replacements, and spark plug replacements. It’s also important to follow the manufacturer’s recommended maintenance schedule.
Common issues
The EJ253 engine is generally a reliable engine, but there are some common issues that owners should be aware of. These include head gasket failure, oil leaks, timing belt failure, and piston ring failure.
Engine lifespan
With proper maintenance and care, the EJ253 engine can last up to 200,000 miles or more. However, if the engine is not properly maintained, it may not last as long.
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