Subaru Impreza 2008 Workshop Repair Service Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2008 Codes Chassis Code: GE/GH/GR/GV Engine Codes: EJ20, EJ25 👋 Introduction Market Position Segment: Compact to mid-size car, known for its...

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza

Year:

Codes

Chassis Code:

GE/GH/GR/GV

Engine Codes:

EJ20, EJ25

👋 Introduction

Market Position

Segment:

Compact to mid-size car, known for its all-wheel-drive capability and performance variants (WRX).

Competitive Analysis

Competitors:

Honda Civic, Toyota Corolla, Mazda 3, Mitsubishi Lancer, Volkswagen Golf.

Key Features

Drivetrain:

Standard Symmetrical All-Wheel Drive (AWD) on most models, a key differentiator.

Engine Options:

Responsive horizontally opposed (boxer) engines offering good balance and a low center of gravity.

Performance Variants:

Availability of high-performance WRX and WRX STI models, appealing to enthusiasts.

📋 Manual Details

Coverage Areas

Vehicle Variants Covered:

All models, engines, trim levels, and transmission types.

Page Count

Estimated Pages:

Over 2000 pages (typical for comprehensive workshop manuals of this era).

Manual Type

Type:

Workshop Repair and Service Manual

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Powertrain:

Engine mechanical (EJ20, EJ25 variants), fuel system, ignition system, exhaust system, transmission (manual and automatic), drivetrain (AWD system).

Chassis:

Suspension (front and rear), steering, brakes (hydraulic and ABS), wheels and tires.

Electrical:

Wiring diagrams, lighting, accessories, power windows, central locking, dashboard instruments, ECUs, sensors, diagnostic connectors (OBD-II).

Body And Trim:

Exterior body panels, interior trim, seats, HVAC system, body sealing, glass.

Procedures Included

Maintenance:

Scheduled maintenance intervals, oil changes, filter replacements, spark plug replacement, fluid checks and changes.

Repair And Rebuild:

Engine overhaul, transmission rebuilds, suspension component replacement, brake caliper overhauls, component diagnostics and repair.

Troubleshooting:

Diagnostic flowcharts for common issues, symptom-based troubleshooting guides, fault code interpretation.

Diagnostics:

ECU identification, sensor testing, actuator testing, OBD-II diagnostics.

Technical Depth

Level:

Comprehensive, suitable for professional technicians and experienced DIY enthusiasts. Covers everything from basic fluid changes to complete engine and transmission overhauls.

📊 Manual Specifications

File Format

Compatibility:

Viewable on any device with a PDF reader (Adobe Acrobat, etc.).

Print Quality

Resolution:

High-resolution scans, ensuring clarity of text, diagrams, and images.

Binding Type

Physical Equivalent:

Digital (PDF) - analogous to a professionally bound workshop manual.

Paper Type

Digital Equivalent:

Digitally equivalent to high-quality, durable paper stock for long-term reference.

⚙️ Engine Specifications

Primary Engine

Engine Type:

Horizontally Opposed (Boxer) 4-cylinder

Displacement Na:

2.5 Liters (EJ25)

Displacement Turbo:

2.0 Liters (EJ20) for WRX models, 2.5 Liters (EJ25) for WRX STI models.

Performance

Horsepower Na 2.5L:

Approximately 170-173 hp (varies slightly by sub-model/market)

Torque Na 2.5L:

Approximately 170 lb-ft (varies slightly by sub-model/market)

Horsepower Wrx:

Approximately 224-265 hp (depending on specific WRX variant)

Horsepower Wrx Sti:

Approximately 305 hp

Fuel System

Induction:

Naturally Aspirated (NA) or Turbocharged

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPFI)

Fuel Type:

Unleaded gasoline (Premium unleaded recommended/required for turbo models).

🔧 Transmission

Standard

Type:

5-speed Manual Transmission (MT)

Optional

Type:

4-speed Automatic Transmission (AT) with SI-DRIVE

Features

AWD System:

Symmetrical All-Wheel Drive (AWD) with viscous coupling center differential (manual) or electronically controlled multi-plate clutch center differential (automatic).

Transmission Fluid Manual:

Hypoid gear oil SAE 75W-90 (API GL-5)

Transmission Fluid Automatic:

Subaru Genuine ATF HP or equivalent (check owner's manual for specific type).

📐 Dimensions

Exterior

Wheelbase:

Approximately 103.2 inches (2620 mm)

Length:

Approximately 179.7 inches (4565 mm)

Width:

Approximately 69.1 inches (1755 mm)

Height:

Approximately 57.7 inches (1465 mm) for sedan, 58.1 inches (1475 mm) for hatchback.

Weights

Curb Weight Na:

Approximately 3100-3300 lbs (1400-1500 kg) depending on body style and transmission.

Curb Weight Wrx:

Approximately 3300-3450 lbs (1500-1565 kg).

Wheel Bolt Pattern:

5 x 100 mm

Tire Size Na:

Typically 205/55R16 or 215/45R17

Tire Size Wrx:

Typically 225/45R17 or 235/45R17

🛡️ Safety Features

Ratings

NHTSA Front Crash:

5-Star (for driver and front passenger in most configurations)

NHTSA Side Impact:

5-Star (for front and rear occupants in most configurations)

IIHS Roof Strength:

Good (in many configurations)

Active Features

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Stability Control:

Standard Electronic Stability Control (VDC - Vehicle Dynamics Control)

Passive Features

Airbags:

Frontal airbags, front side-impact airbags, and side curtain airbags (standard on most models).

Seatbelts:

Three-point seatbelts with pretensioners and load limiters.

💡 Technology Features

Infotainment

Head Unit:

Standard CD player with MP3 capability, auxiliary input. Optional navigation system available.

Driver Assistance

Cruise Control:

Standard cruise control.

Si Drive:

Available on automatic transmission models, allowing drivers to select between Intelligent, Sport, and Sport Sharp modes.

Connectivity

Bluetooth:

Available on higher trim levels or as an optional accessory. Not standard on all models.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 6 months (severe duty) or 7,500 miles or 12 months (normal duty). Check owner's manual for specifics.

Air Filter Replacement:

Every 15,000-30,000 miles, or as needed based on driving conditions.

Spark Plug Replacement:

Iridium plugs typically last 60,000-100,000 miles. Check manual for exact interval and type.

Coolant Replacement:

Subaru Super Coolant: Initial change at 105,000 miles or 7 years, then every 45,000 miles or 4.5 years.

Fluid Specifications

Engine Oil:

0W-20 synthetic recommended for most naturally aspirated models. 5W-30 or 5W-40 synthetic may be recommended for turbo models. Always confirm with manual.

Engine Oil Capacity:

Approximately 4.5-5.1 quarts (4.3-4.8 liters) depending on engine. Check manual.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Known Issues

Head Gaskets:

While less common on the EJ25 in this generation compared to earlier models, some instances of coolant leaks from head gaskets can occur, particularly in high-mileage or abused vehicles.

Turbocharger Wear:

On WRX models, turbocharger longevity depends heavily on maintenance and driving style. Oil starvation due to infrequent oil changes or blow-by can cause premature wear.

Clutch Wear:

Manual transmission clutches can wear prematurely with aggressive driving or improper engagement. The factory clutch is generally robust for normal use.

Drivetrain Maintenance:

Regular servicing of the center differential and rear differential fluids is crucial for AWD longevity.

📚 Vehicle History

Brand Heritage

Specialty:

Subaru is renowned for its pioneering use of Symmetrical All-Wheel Drive and horizontally opposed engines.

Model Evolution

Generation Code:

Third generation Impreza (GE/GH/GR/GV).

Design Changes:

Introduced a more mainstream design compared to the previous generation, with sedan and hatchback body styles. WRX models retained a sportier appearance.

Production

Manufacturing Location:

Japan (various Subaru plants).

🏆 Awards & Recognition

Recognitions

IIHS Top Safety Pick:

Many Subaru models, including the Impreza, frequently receive good safety ratings from IIHS and NHTSA, reflecting Subaru's commitment to safety.