Engine:
Detailed diagnostics, repair procedures, and specifications for EJ253 (2.5L SOHC) and EJ255 (2.5L DOHC Turbo - XT models) engines.
Fuel System:
Fuel injection, fuel pump, injectors, fuel lines, evaporative emissions control (EVAP).
Ignition System:
Ignition coils, spark plugs, timing, ignition control module (ICM).
Exhaust System:
Catalytic converter, mufflers, exhaust manifolds, O2 sensors.
Cooling System:
Radiator, thermostat, water pump, cooling fans, coolant specifications.
Transmission Manual:
Clutch, gearbox, shift linkage, fluid specifications, repair procedures for 5-speed manual transmissions.
Transmission Automatic:
Torque converter, valve body, planetary gears, transmission control module (TCM), fluid specifications, repair procedures for 4-speed automatic transmissions (e.g., 4EAT).
Drivetrain:
All-Wheel Drive (AWD) system, front and rear differentials, driveshafts, CV joints, axle shafts.
Suspension:
Front struts, rear shock absorbers, control arms, sway bars, bushings, wheel alignment specifications.
Steering:
Power steering system, steering rack, tie rods, steering column, fluid type.
Brakes:
Front and rear disc brakes, brake pads, rotors, calipers, master cylinder, brake fluid specifications, ABS system diagnostics.
Electrical System:
Battery, alternator, starter, wiring diagrams, fuses, relays, lighting system.
Body And Chassis:
Body panels, doors, fenders, hood, tailgate, interior trim, chassis components, rust prevention.
HVAC:
Air conditioning system, heater core, blower motor, refrigerant, climate control diagnostics.
Restraints:
Airbag system, SRS module, seatbelt pre-tensioners.
Instrument Panel:
Gauges, warning lights, dashboard indicators, and their functions.
Lighting:
Headlights, taillights, interior lights, fog lights, bulb types and replacement.
Maintenance:
Oil changes, filter replacements, fluid checks and changes, belt inspection and replacement, spark plug service, brake fluid flush.
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting, electrical system diagnosis, engine performance issues.
Repair:
Engine component overhaul, transmission rebuilding, suspension component replacement, brake system repair, electrical component repair.
Disassembly Reassembly:
Step-by-step instructions for removing and installing major vehicle components.
Specifications:
Torque specifications for all fasteners, clearances, fluid capacities, engine timing, wheel alignment angles.
Diagnostic Codes:
Listing and explanation of OBD-II diagnostic trouble codes (DTCs) and specific Subaru diagnostic codes.
Wiring Diagrams:
Detailed electrical system wiring diagrams for all major systems, crucial for troubleshooting.
Tire Rotation:
Recommended procedures and patterns for tire rotation.
Wheel Alignment:
Specifications for front and rear wheel alignment parameters.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, including detailed electrical diagnostics.
Engine Rebuild:
Includes specifications and procedures for full engine disassembly, inspection, and reassembly.
Transmission Repair:
Covers internal transmission repairs, valve body service, and torque converter replacement for both manual and automatic transmissions.
Body Repair:
Information on body panel replacement, dent repair, and structural component repair.
Engine Code Naturally Aspirated:
EJ253
Engine Description Naturally Aspirated:
2.5L (2457cc) SOHC EJ253 Boxer-4
Bore X Stroke Naturally Aspirated:
99.5 mm x 79.0 mm
Compression Ratio Naturally Aspirated:
9.7:1
Horsepower Naturally Aspirated:
165 hp @ 5600 rpm
Torque Naturally Aspirated:
166 lb-ft @ 4000 rpm
Engine Code Turbocharged:
EJ255
Engine Description Turbocharged:
2.5L (2457cc) DOHC EJ255 Boxer-4 with Turbocharger
Horsepower Turbocharged:
210 hp @ 5600 rpm (Forester 2.5XT)
Torque Turbocharged:
235 lb-ft @ 3600 rpm (Forester 2.5XT)
Fuel Requirement:
87 octane unleaded gasoline (91 octane recommended for XT models).
Fuel Delivery:
Multi-point Electronic Fuel Injection (MPI)
Oil Change Interval:
Every 3,750 miles or 3 months (normal driving) or 7,500 miles or 7.5 months (severe driving/synthetic oil).
Engine Oil Capacity:
4.5 US quarts (4.3 liters) with filter for 2.5L SOHC, 4.8 US quarts (4.5 liters) with filter for 2.5L DOHC Turbo.
Spark Plug Replacement:
Typically around 60,000 miles for iridium plugs.
Timing Belt Replacement:
Not applicable for the 2005 Forester, as it uses a timing chain.
Engine Oil Spec:
API SN or higher, ILSAC GF-5 or higher, SAE 5W-30 (check owner's manual for variations).
Coolant Spec:
Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant, pre-mixed 50/50 with distilled water.
Brake Fluid Spec:
DOT 3 or DOT 4 brake fluid.
Head Gaskets:
While less prevalent than in earlier EJ engines, head gasket leaks can still occur, especially in high-mileage or poorly maintained vehicles. The manual provides diagnostic and repair procedures.
Turbo Oil Lines Xt Models:
Turbocharged XT models can be prone to cracked oil feed lines, leading to turbo failure. Regular inspection and replacement are recommended. The manual details their location and replacement.
Rear Wheel Bearings:
Rear wheel bearings can sometimes wear out, causing noise. The manual covers their diagnosis and replacement.