SUBARU IMPREZA WRX STI Full Service & Repair Manual 2008

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2008 Manual Product Name: SUBARU IMPREZA WRX STI Full Service & Repair Manual 2008 Codes Chassis Code Series: GR/GV...

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标签: 2008 Car Cars IMPREZA WRX STI Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Manual Product Name:

SUBARU IMPREZA WRX STI Full Service & Repair Manual 2008

Codes

Chassis Code Series:

GR/GV (Hatchback/Sedan)

👋 Introduction

Market Position

Segment:

Performance Compact Sedan/Hatchback

Target Audience:

Enthusiast drivers, performance tuning community, DIY mechanics, professional workshops.

Competitive Analysis

Key Competitors 2008:

Mitsubishi Lancer Evolution, Subaru WRX (non-STI), Volkswagen GTI, Mazdaspeed3.

Key Features

Performance Focus:

Subaru's iconic Symmetrical All-Wheel Drive system and turbocharged boxer engine define its performance pedigree.

Rally Heritage:

Directly benefits from Subaru's extensive World Rally Championship (WRC) heritage, translating into robust engineering for demanding use.

Driver Engagement:

Focus on driver feedback, precise handling, and a powerful, responsive powertrain.

📋 Manual Details

Coverage Areas

Primary Coverage:

North America, Europe, Australia

Engine Variants Covered:

2.5L Turbocharged EJ257

Transmission Variants Covered:

6-Speed Manual Transmission

Page Count

Estimated Pages:

Approximately 2500-3000 (typical for full factory manuals)

Manual Type

Type:

Factory Service Manual / Workshop Manual

Language

Language:

English

Format

Format:

Digital Download (PDF)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete engine overhaul, cylinder head, block, pistons, crankshaft, camshafts, timing belt/chain, lubrication system, cooling system.

Engine Performance Tuning:

Turbocharger system, intercooler, ECU (Engine Control Unit) diagnostics and parameters, fuel injection, ignition system.

Transmission:

6-speed manual gearbox, clutch system, drivetrain components (driveshafts, differentials).

Suspension Steering:

Front and rear suspension (McPherson struts, multi-link), sway bars, bushings, power steering system, alignment specifications.

Brakes:

Front and rear brake systems (including Brembo calipers on STI models), ABS (Anti-lock Braking System), EBD (Electronic Brakeforce Distribution), parking brake.

Electrical Electronics:

Complete wiring diagrams, ECU pinouts, sensors, actuators, starter, alternator, battery, lighting systems, audio system, power accessories.

Body Chassis:

Body panel removal and installation, structural components, interior trim, glass, doors, hood, trunk lid, chassis lubrication.

HVAC:

Heating, Ventilation, and Air Conditioning system diagnosis and repair.

Fuel System:

Fuel tank, fuel pump, fuel lines, injectors, fuel pressure regulator.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, brake pad replacement.

Diagnostics:

Troubleshooting guides for common symptoms, fault code interpretation (OBD-II), diagnostic connector locations.

Repair Rebuild:

Detailed step-by-step instructions for engine rebuilds, transmission overhaul, suspension component replacement, brake caliper rebuild.

Electrical Diagnostics:

Component testing, circuit tracing, use of multimeters and oscilloscopes, ABS/VDC system diagnostics.

Bodywork Repair:

Panel replacement, welding procedures (if applicable for chassis), bumper repair, glass replacement.

Tire Wheel Service:

Tire mounting and balancing, wheel torque specifications, alignment procedures.

Technical Depth

Depth:

Comprehensive, from basic maintenance to full engine and transmission rebuilds, including advanced diagnostics.

Detail Level:

Factory-level detail with torque specifications, clearances, assembly sequences, and electrical schematics.

📊 Manual Specifications

File Format

Format:

Searchability:

Searchable text content for quick information retrieval.

Printability:

Printable pages for workshop use.

Print Quality

Quality:

High-resolution images and diagrams.

Binding Type

Type:

N/A (Digital Format)

Paper Type

Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Code:

EJ257

Configuration:

Horizontally-opposed (Boxer), 4-Cylinder

Displacement:

2.5 Liters (2457 cc)

Aspiration:

Turbocharged and Intercooled

Performance

Horsepower Hp:

305 hp @ 6000 RPM (approx.)

Torque Lb Ft:

290 lb-ft @ 4000 RPM (approx.)

Fuel System

Induction:

Multi-Point Fuel Injection (MPI)

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Engine Management

Engine Control Unit (ECU) - Specific model varies by market, but generally programmable for tuning.

🔧 Transmission

Standard

Type:

6-Speed Manual Transmission

Drivetrain:

Symmetrical All-Wheel Drive (AWD) with Driver-Controlled Center Differential (DCCD)

Optional

Type:

None for WRX STI models in 2008

Features

Clutch:

Hydraulic, multi-plate type (often upgraded from standard WRX).

Dccd Modes:

Automatic and Manual modes for center differential lock-up bias control.

📐 Dimensions

Exterior

Length In:

179.7 (Sedan), 173.8 (Hatchback)

Width In:

Height In:

58.1 (Sedan), 58.3 (Hatchback)

Wheelbase In:

103.0

Weights

Curb Weight Lbs:

3296 (Sedan), 3373 (Hatchback)

Gross Vehicle Weight Rating Lb:

Cargo

Trunk Volume Cu Ft:

11.7 (Sedan)

🛡️ Safety Features

Ratings

NHTSA Frontal Crash:

5-Star Driver, 4-Star Passenger (for comparable Impreza models of that era, STI specific data may vary slightly)

IIHS Frontal Offset:

Good (for comparable Impreza models of that era)

Active Features

Standard Anti-lock Braking System

Standard Electronic Brakeforce Distribution

Traction Control:

Standard Traction Control System (TCS)

Stability Control:

Standard Vehicle Dynamics Control (VDC)

Passive Features

Airbags:

Front dual-stage airbags, front side-impact airbags, front and rear side-curtain airbags.

Seatbelts:

3-point height-adjustable front seatbelts with pretensioners and force limiters, rear 3-point seatbelts.

Child Anchors:

LATCH (Lower Anchors and Tethers for Children) system.

💡 Technology Features

Infotainment

Head Unit:

Standard AM/FM/CD stereo system with available options for satellite radio and auxiliary input (model dependent).

Driver Assistance

AWD System:

Subaru's Symmetrical All-Wheel Drive with Driver-Controlled Center Differential (DCCD) for optimal traction and handling control.

Connectivity

Auxiliary Input:

Available auxiliary audio input jack.

🔧 Maintenance

Service Intervals

Oil Change Miles:

Every 3,750 miles or 6 months (severe duty/enthusiast driving), 7,500 miles or 12 months (normal driving).

Air Filter Replacement Miles:

Every 15,000 miles or 12 months.

Spark Plug Replacement Miles:

Every 30,000 miles (iridium tip).

Timing Belt Inspection Miles:

Inspect every 30,000 miles. Replacement interval typically around 105,000 miles, but critical to follow manual specifics.

Fluid Specifications

Engine Oil Type:

SAE 0W-30 Synthetic (API SG, SH, SJ, SL, SM or ILSAC GF-2, GF-3, GF-4 compliant)

Engine Oil Capacity Quarts:

5.5 (with filter)

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant.

Transmission Fluid Type:

API GL-4, SAE 75W-90 Synthetic Gear Oil (Specific Subaru gear oil recommended).

Differential Fluid Type:

API GL-5, SAE 75W-90 Synthetic Gear Oil (Front and Rear).

Brake Fluid Type:

DOT 3 or DOT 4.

Known Issues

Piston Ring Land Failure:

A known potential issue in some EJ257 engines, particularly with aggressive tuning or lack of proper maintenance. Manual will detail inspection procedures.

Clutch Wear:

Can be subject to accelerated wear with aggressive driving or frequent clutch engagement.

Rear Differential Clunk:

Some owners report a clunking noise from the rear differential, often related to backlash in the gears. Manual covers fluid changes and potential adjustments.

📚 Vehicle History

Brand Heritage

Subaru Motorsports:

Subaru's long and successful history in motorsport, particularly the WRC, directly influences the STI's development and capabilities.

Model Evolution

Third Generation Hatchback:

The 2008 model year marked the introduction of the third-generation Impreza, significantly changing its styling and introducing the hatchback option alongside the sedan.

Performance Enhancements:

The STI variant received increased power, upgraded suspension, and the advanced DCCD system compared to the standard WRX.

Production

Manufacturing Location:

Ota City, Gunma Prefecture, Japan

🏆 Awards & Recognition

Recognitions

Performance Car Awards:

The WRX STI platform has consistently received accolades from automotive journalists and enthusiasts for its performance, handling, and rally-inspired capabilities.