SUBARU 2.5L Engine

Part Type:  Remanufactured Engine Assembly (Factory Spec)

This remanufactured SUBARU 2.5L engine (non-turbo) includes the following enhancements from Fraser Engines:

• Bore and hone all cylinders to OEM clearances (We check all clearances within .0001 of inch),
• Decking cylinder head(s) and block for straightness,
• Cutting valve seats and valves to proper degree,
• Line boring/honing crankshaft/camshaft tunnels,
• Ground & polish crankshaft, new or remanufactured camshaft(s),
• New main bearings, rod bearings, pistons, piston rings, lifters, pushrods (if equipped), timing components, oil pump, head bolts,
• All new internal gaskets and seals.
• All finishing gaskets are included (MAY VARY PER APPLICATION).

SUBARU 2.5L Engines

The SUBARU 2.5 Liter Engine (1999-2010) is a horizontally opposed four-cylinder engine designed and manufactured by Subaru Corporation.

The base engine consists of:

An all-aluminum engine block and cylinder head
Dual Overhead Camshafts (DOHC)
Active Valve Control System (AVCS)
Sequential multi-port fuel injection

The engine specifications include:

• A displacement of 150.9 cubic inches (2,457 cubic centimeters)
• 3.62 in x 3.39 in (92.0 mm x 86.0 mm) cylinder bore and piston stroke
• 10.0:1 compression ratio
• 165 to 175 horsepower (123 to 130 kW) at 5,600 to 6,000 rpm
• 166 to 170 lb-ft (225 to 230 Nm) of torque at 4,000 to 4,400 rpm

The SUBARU 2.5 Liter Engine (1999-2010) was first introduced in the 1999 Subaru Legacy, and quickly became a staple in the Subaru lineup, being used in the Impreza, Forester, and Outback models. The engine featured an Active Valve Control System (AVCS) to vary the timing of the intake and exhaust valves, which improved both performance and fuel efficiency.

Over the years, Subaru made incremental updates to the engine, improving its power output and efficiency. The engine was also used in the Subaru WRX and STI performance models, where it was modified with turbochargers and intercoolers to produce up to 305 horsepower and 290 lb-ft of torque.

Overall, the SUBARU 2.5 Liter Engine (1999-2010) is a reliable and efficient engine that has powered millions of Subaru vehicles around the world.