Engine Mechanical:
Engine assembly, disassembly, overhaul, timing belt/chain, lubrication system, cooling system, intake manifold, exhaust system.
Engine Management:
Fuel injection, ignition system, emissions control, ECU (Engine Control Unit) diagnostics and programming.
Transmission Manual:
Clutch system, manual transmission assembly/disassembly, gear ratios, shift linkage, maintenance.
Transmission Automatic:
Automatic transmission (if applicable, though WRX is typically manual) assembly/disassembly, torque converter, fluid maintenance.
Drivetrain:
All-Wheel Drive (AWD) system, front/rear differentials, driveshafts, CV joints, hub assemblies.
Suspension:
Front and rear suspension components, struts, shocks, control arms, bushings, alignment procedures, servicing.
Steering:
Power steering system, steering rack, steering column, tie rods, wheel alignment.
Brakes:
Brake system hydraulics, ABS (Anti-lock Braking System), brake discs, pads, calipers, parking brake, bleeding procedures.
Wheels Tires:
Wheel specifications, tire pressure monitoring system (TPMS), tire rotation, balancing, wheel mounting procedures.
Body Exterior:
Body panels, doors, hood, trunk, bumpers, glass, trim, corrosion protection, body repair.
Body Interior:
Dashboard, seats, upholstery, interior trim, airbags, seat belts, climate control vents.
Electrical System:
Battery, charging system, starting system, lighting system, wiring diagrams, fuses, relays.
Climate Control:
HVAC (Heating, Ventilation, and Air Conditioning) system, refrigerant, compressor, evaporator, heater core, controls.
Infotainment Audio:
Audio system, speakers, navigation (if equipped), antennas, head unit removal/installation.
Safety Systems:
Airbag system, seatbelt pretensioners, SRS (Supplemental Restraint System) diagnostics.
Maintenance Routine:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, brake inspections.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault code interpretation, symptom-based troubleshooting guides.
Repair Major:
Engine rebuild, transmission overhaul, suspension component replacement, body panel repair.
Repair Minor:
Component replacement (e.g., alternator, starter, brake pads), minor electrical fixes, interior trim repairs.
Diagnosis Diagnostics:
Step-by-step diagnostic procedures for electrical and mechanical systems, use of diagnostic tools.
Wiring Diagrams:
Detailed electrical system wiring diagrams for all major circuits, component locations.
Torque Specifications:
Precise torque values for all critical fasteners during assembly and disassembly.
Special Tools:
Identification and usage of specialized tools required for specific repair procedures.
Depth Level:
Factory-level comprehensive coverage, suitable for professional technicians and advanced DIY enthusiasts.
Diagnostic Capability:
Detailed diagnostic trouble code (DTC) interpretation and troubleshooting flows.
Rebuild Procedures:
Complete procedures for engine, transmission, and differential rebuilds.
Calibration Procedures:
Procedures for calibration of sensors and control modules after replacement or adjustment.
Oil Change Interval:
Every 3,750 miles (6,000 km) or 6 months, whichever comes first (severe driving conditions recommended). Refer to manual for exact intervals based on driving type.
Engine Air Filter:
Inspect every 15,000 miles (24,000 km), replace as needed. Refer to manual for replacement intervals.
Cabin Air Filter:
Inspect every 15,000 miles (24,000 km), replace as needed. Refer to manual for replacement intervals.
Spark Plugs:
Iridium spark plugs typically have a longer life; refer to manual for specific mileage recommendations (e.g., 60,000 miles).
Timing Belt Chain:
EJ255 engine uses a timing belt. Replace every 105,000 miles (168,000 km) or 7 years, whichever comes first. Refer to manual for exact interval.
Engine Oil:
SAE 5W-30, API SJ, SL, SM, or SN rated. Check manual for specific oil viscosity and API rating requirements. Often recommends synthetic oil.
Coolant:
Subaru Super Coolant (Blue) or equivalent P-HOAT coolant. Capacity: Approx. 7.7 L (8.1 US qt).
Brake Fluid:
DOT 3 or DOT 4 brake fluid. Recommended to use high-performance fluid for spirited driving.
Transmission Fluid Manual:
API GL-5 Gear Oil, SAE 75W-90. Capacity: Approx. 2.1 L (2.2 US qt).
Differential Fluid Front:
API GL-5 Gear Oil, SAE 75W-90. Capacity: Approx. 0.9 L (1.0 US qt).
Differential Fluid Rear:
API GL-5 Gear Oil, SAE 75W-90. Capacity: Approx. 1.1 L (1.2 US qt).
Ring Land Failure:
A known issue with EJ series engines, particularly when driven hard or modified without proper supporting modifications. Can lead to piston ring land cracking.
Clutch Wear:
Due to the performance nature and AWD system, clutches can wear faster than typical vehicles, especially with aggressive driving.
Rear Wheel Bearing:
Some owners report premature wear of rear wheel bearings.
Oil Consumption:
Some EJ engines can exhibit higher-than-average oil consumption, especially as they age. Regular checks are recommended.