Eliminate excessive oil consumption and restore all-wheel-drive traction with the Subaru FB20B 2.0L Remanufactured Engine across challenging all-weather roads. This 2.0L opposed 4-Cylinder 16-Valve DOHC long block features Dual AVCS cam phasing and A20L/R block castings. Upgraded piston oil control rings eliminate cylinder bore scuffing. Technicians must prime the engine oil system prior to startup to protect camshaft journals.

High-pressure die-cast aluminum alloy forms the open-deck split crankcase marked A20L and A20R, housing centrifugal cast iron cylinder liners. A micro-polished forged steel crankshaft rotates in align-honed main saddles below twin 16-Valve DOHC aluminum cylinder heads with Dual AVCS phasers. Bare engine mass measures 220 lbs. Shipping crate dimensions span 36in length, 36in width, and 36in height, with the upper oil pan featuring an L-shaped water pipe holding 5.5 quarts of motor oil.

Key Features of Subaru FB20B

Independent repair shops buy Subaru FB20B 2.0L remanufactured engine assemblies to eliminate chronic oil burning and restore boxer engine power on modern crossovers. This precision long block replaces tired powertrains in all-wheel-drive passenger platforms.

- Dual AVCS cam phasers advance intake and exhaust valve timing to maximize low-RPM crossover passing torque.
- Opposed cylinder boxer configuration provides natural rotational balance to cancel engine vibration under load.
- Upgraded piston ring packs stop chronic oil consumption past the cylinder walls during highway driving.
- Factory-installed silent timing chain system eliminates maintenance intervals common to older belt-driven engines.
- Upper aluminum oil pan casting includes the factory L-shaped water pipe connection for oil cooling.
- Multi-layer steel cylinder head gaskets create an impenetrable seal against high combustion pressures.
- Line-honed split crankcase main saddles guarantee hydrodynamic bearing oil wedge support under acceleration.

Boxer Engine Dyno Machining Specifications

Dynamometer spin testing confirms 148HP at 6,200 RPM and 145 ft-lbs torque at 4,200 RPM on unleaded gasoline. Crankshaft main journal runout measures within 0.0003in TIR across induction-hardened bearing pins. Connecting rod oil clearances hold at 0.0012in to prevent hydrodynamic bearing breakdown during rapid acceleration sweeps. Hot oil pressure sustains 55 PSI at 3,000 RPM with coolant stabilized at 195°F. Cylinder compression tests record 185 PSI across all four opposed cylinders, confirming uniform valve seat concentricity and complete piston ring seal.

Vehicle Fitment Drivetrain Guide

Exact vehicle fitment covers 2012 to 2014 Subaru Impreza and 2013 to 2014 Subaru XV Crosstrek models equipped with the H4 2.0L 1995cc engine. Identification confirms block casting A20L/R with chain-drive cams, Dual I-AVLS, and an upper oil pan with an L-shaped water pipe. It mates with Lineartronic CVT and 5-Speed manual all-wheel-drive transaxles. This engine does not fit earlier belt-driven EJ20 engines, Forester FB25 2.5L chassis, or BRZ FA20 platforms.

Installation Protocol Service Requirements

Electronic drive-by-wire throttle linkages require clean electrical connections during engine bay placement. Mechanics must verify proper oil control solenoid operation and replace O-rings on the upper pan water pipe before coolant fill. Never install this naturally aspirated FB20B long block in custom turbo conversions running over 6 PSI on stock compression pistons.

- Drain initial break-in engine oil and swap the spin-on filter after 500 operating miles.
- Inspect serpentine accessory drive belt tension and coolant level every 10,000 driving miles.
- Change motor oil and filter every 3,000 miles using certified 0W-20 synthetic engine oil.

Warranty Terms Core Return Policy

Warranty coverage guarantees a 3-Year Unlimited-Mile replacement protection plan on internal lubricated engine rotating components. Return your like-for-like core within 30 days using prepaid freight pickup to claim your core credit. The crated package contains the remanufactured long block, complete timing assembly, oil pan, and shop manuals.