EJCP.PARTS

SUBARU 2.5 FB DOHC

(Japanese: Subaru FB engine) An entirely new generation of boxer engine announced on 23 September 2010.[8] By increasing piston stroke and decreasing piston bore, Subaru aimed to reduce emissions and improve fuel economy, while increasing and broadening torque output over the previous generation engine. The FB has an all new block and head featuring dual overhead cams with intake and exhaust variable valve timing (AVCS - Active Valve Control System), and a timing chain that replaced the timing belt. Moving to chain-driven cams is said to allow the valves to be placed at a more narrow angle to each other and shrink the bore of cylinder from 99.5 mm to 94. It results in less unburned fuel during cold start, thereby reducing emissions. Subaru is able to maintain the exterior dimension substantially unchanged by asymmetrical connecting rods like those in EZ36. The FB is only marginally heavier. Car and Driver is told direct injection will be added soon. Subaru claims a 28-percent reduction in friction losses, mainly due to lighter pistons and connecting rods.[9][10] The FB has a 10% improvement in fuel economy with the power coming on sooner and the torque band being broader.[WIKI]

SIZES BLOCK MATERIAL HEAD MATERIAL CAM TYPE FUEL SYSTEM
2.5 ALUMINUM ALUMINUM DOHC MPFI

ITEMS

BRACKETS EXHAUST MANIFOLD INTAKE MANIFOLD OIL PAN PISTON
SENSORS TIMING COVER TIMING SET VALVE COVER VALVE INFORMATION

LISTING TEMPLATES

SIZES COMPATABILITY NOTES
2.5 DOHC 11-13 FORESTER FEDERAL EMMISIONS/ OR PZEV
DIFFRENCE IS INJECTORS
DUAL IDLER TIMING COVER
2.5 DOHC 13-14 LEGACY OUTBACK NOTE FED OR CALI
NOTE AT/MT
OIL PAN DIFFER?
2.5 DOHC 14-15 FORESTER ALL ARE THE PZEV VERSION
UPPER PAN DIFFER AT/MT
2.5 DOHC 15 LEGACY OUTBACK NOTE FED OR CALI
NOTE AT/MT
OIL PAN DIFFER?
2.5 DOHC 16 FORESTER ALL ARE THE PZEV VERSION
UPPER PAN DIFFER AT/MT
2.5 DOHC 16 LEGACY OUTBACK NOTE FED OR CALI
NOTE AT/MT
OIL PAN DIFFER?
2.5 DOHC 17 FORESTER ALL ARE THE PZEV VERSION
UPPER PAN DIFFER AT/MT
2.5 DOHC 17 LEGACY OUTBACK NOTE FED OR CALI
NOTE AT/MT
OIL PAN DIFFER?

VALVE INFORMATION

MAKE MODEL YEAR RANGE
**** **** ****
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST 28 5.45 94.1 1 *SUB25DU
INTAKE **** **** **** **** *SUB25DU

TIMING COVER FOR FORESTER/ IMPREZA XV CROSSTREK HAS DUAL IDLERS
ONE AT 12:30 THE OTHER AT 2.

CAMSHAFT POSITION SENSOR

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