🏷️ Basic Information Identification Make: Audi Model: 80 / 90 Variant: S2 (3B Engine) Year: 1987 Codes Engine Code: 3B 👋 Introduction Market Position Positioning: Performance-oriented luxury compact sedan/coupe in its era, competing with BMW 3 Series and Mercedes-Benz 190. Competitive Analysis Competitors: BMW 3 Series (E30), Mercedes-Benz 190E (W201). Key Features S2 Features: Turbocharged 20-valve 5-cylinder engine, quattro all-wheel drive, sport-tuned suspension, aerodynamic enhancements. Manual Value Proposition Benefits: Empowers owners and technicians with detailed technical knowledge for accurate maintenance, diagnostics, and repairs, preserving the vehicle's performance and longevity. 📋 Manual Details Coverage Areas Coverage: Complete Workshop Service and Repair Page Count Estimated Pages: High (typically 800+ pages for comprehensive factory manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English (typically, but may vary; original German is also common) Format Format: Digital Download (PDF or similar electronic format) 📖 Manual Coverage Systems Covered Engine: Detailed diagnosis, repair, overhaul, tuning of the 3B engine. Fuel System: Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel lines, pressure regulation. Ignition System: Ignition timing, coil packs, spark plugs, control module. Cooling System: Radiator, water pump, thermostat, hoses, coolant specifications, fan operation. Exhaust System: Catalytic converter, exhaust manifold, mufflers, pipe routing, emissions controls. Transmission: Manual transmission (likely 5-speed quattro), clutch system, gearbox overhaul, fluid specifications. Drivetrain: Quattro all-wheel-drive system, differentials, driveshafts, CV joints. Suspension: Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications. Steering: Power steering system, steering rack, tie rods, steering column. Brakes: Front and rear brake systems (likely disc brakes all around), ABS operation, brake fluid, bleeding procedures. Electrical System: 12V electrical system, battery, alternator, starter motor, lighting, fuses, relays, wiring diagrams. Climate Control: HVAC system, blower motor, heater core, A/C system (if equipped), refrigerant. Body And Chassis: Body panels, doors, hood, trunk, interior trim, chassis construction, rust prevention. Safety Systems: Seat belts, airbags (if applicable to this year/variant), structural integrity. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, tune-ups. Diagnostics: Troubleshooting guides, symptom analysis, diagnostic trouble codes (if applicable). Repair: Step-by-step repair instructions for all major vehicle systems. Disassembly Assembly: Detailed procedures for removing and installing components. Rebuilding Overhaul: Procedures for rebuilding engines, transmissions, and other major components. Adjustment: Settings and adjustments for engine timing, brakes, clutch, etc. Torque Specifications: Detailed torque values for all fasteners. Wiring Diagrams: Comprehensive electrical wiring schematics for all systems. Technical Depth Depth: Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format Format Details: Likely PDF with searchable text, enabling easy navigation and printing. Print Quality Printability: Designed for complete printability of individual sections or the entire manual. Binding Type Binding Style: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 5-cylinder, 20-valve, turbocharged Displacement: 2.2 Liters (2226 cc) Bore X Stroke: 81.0 mm x 86.4 mm (approximate) Compression Ratio: 8.5:1 (approximate) Performance Horsepower: 217 hp (162 kW) @ 5900 rpm Torque: 247 lb-ft (335 Nm) @ 3000 rpm Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection with turbocharging Fuel Type: Premium Unleaded Gasoline (91+ octane) Engine Management ECU Type: Bosch Motronic (specific version for 3B engine) Turbocharger: Garrett T3 or similar, intercooled Intercooler: Air-to-air front-mounted intercooler 🔧 Transmission Standard Type: 5-speed Manual Optional Type: None (S2 3B exclusively manual) Features Drivetrain: Quattro Permanent All-Wheel Drive Gear Ratios: Refer to manual for specific gear ratios (e.g., 1st: 3.500, 2nd: 2.059, 3rd: 1.333, 4th: 1.000, 5th: 0.778) Transmission Fluid Fluid Type: GL-4 or GL-5 Hypoid Gear Oil (e.g., SAE 75W-90, refer to manual for specific Audi spec) Capacity: Refer to manual for specific transmission fluid capacity (typically ~2.0 liters for gearbox) 📐 Dimensions Exterior Length: Approximately 4415 mm (sedan), 4345 mm (coupe) Width: Approximately 1700 mm Height: Approximately 1390 mm (coupe), 1415 mm (sedan) Weights Curb Weight: Approximately 1300-1400 kg (depending on body style and equipment) Gross Vehicle Weight: Refer to manual or vehicle placard Wheels Tires Wheel Bolt Pattern: 5x112 mm Tire Size: Typically 205/55 VR 15 or 205/50 VR 16 (S2 specific) Wheel Size: 7Jx15 or 7Jx16 (S2 specific) 🛡️ Safety Features Ratings Crash Test History: Limited comprehensive data available for this era, but known for robust chassis construction. Active Features ABS: Anti-lock Braking System (ABS) standard on S2 models. Passive Features Seat Belts: 3-point seat belts with front pre-tensioners. Airbags: Driver airbag potentially optional or standard depending on market and specific production date. Chassis Design: Unit-body construction with crumple zones. 💡 Technology Features Infotainment Audio System: Original Audi Gamma II or similar cassette player with AM/FM radio. Speaker configuration typically 4 or 6 speakers. Driver Assistance ABS: Standard ABS system. Connectivity Original Features: Basic climate control, power windows (often), central locking (often). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or 12 months, consult manual for precise interval based on driving...