🏷️ Basic Information Identification Make: BMW Model: 3 Series, 5 Series Product Name: BMW 3 & BMW 5 Series 1983-1991 Service Repair Manual Generation Covered Years: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 👋 Introduction Market Position Era: Covers the popular E30 (3 Series) and E28/E34 (5 Series) generations, BMW's entry into mass-market sport sedans. Competitive Analysis Rivals: Competed with Mercedes-Benz W201 (190E) and W124 (E-Class), Audi 80/100, Volvo 240/740. Key Features Driving Dynamics: Renowned for precise handling, rear-wheel drive, balanced chassis, and responsive engines. Build Quality: German engineering, solid construction, and durable materials characteristic of BMW. Manual Value Purpose: Essential for owners and independent mechanics to maintain and repair these classic BMWs, preserving their performance and value. 📋 Manual Details Coverage Areas Primary Focus: Service and Repair Page Count Estimated Pages: Varies by specific model/engine, typically 800+ pages for comprehensive coverage of both series. Manual Type Type: Factory Authorized Service and Repair Manual Language Language: English Format Format: Digital Download (likely PDF) 📖 Manual Coverage Systems Covered Engine: Comprehensive engine overhauls, diagnostics, repair procedures for M10, M20, M30, M40, M42 (likely 4-cyl and 6-cyl variants) gasoline engines. Fuel System: Fuel injection systems (Bosch L-Jetronic, Motronic), carburetors (where applicable), fuel pumps, lines, and filters. Ignition System: Ignition coils, distributors, spark plugs, timing, electronic ignition control. Cooling System: Radiator, coolant hoses, thermostat, water pump, fan clutch, cooling fan. Exhaust System: Exhaust manifolds, catalytic converters (if equipped), mufflers, pipes, hangers. Transmission: Manual transmission (Getrag, ZF) repair, clutch replacement, automatic transmission (ZF, GM) overhaul and diagnostics. Drivetrain: Driveshafts, universal joints, CV joints, differential repair, rear axle assembly. Suspension: Front struts, rear shock absorbers, control arms, bushings, sway bars, wheel bearings. Steering: Steering rack, power steering pump, hoses, linkages, steering column. Brakes: Disc brake calipers, rotors, pads, brake lines, master cylinder, ABS diagnostics (if equipped). Electrical System: Wiring diagrams, fuse box layout, starter, alternator, battery, lighting, power windows, central locking. Body And Chassis: Body panel repair, door mechanisms, window regulators, interior trim, rust prevention and repair. HVAC: Heater core, ventilation system, A/C system (charging, leak detection, component replacement). Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspections and replacement. Diagnostics: Troubleshooting guides for common issues, symptom-based diagnostics, use of diagnostic tools. Repair: Step-by-step instructions for component removal, replacement, and reassembly for all major systems. Rebuilds: Detailed procedures for engine and transmission overhauls, including torque specifications and clearances. Adjustments: Valve adjustments, timing belt tension, idle speed adjustments. Specifications: Torque specifications, clearances, fluid capacities, electrical component resistance values. Technical Depth Depth: Comprehensive, from basic maintenance to complete engine and transmission rebuilds, including electrical system diagnostics and wiring diagrams. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Print Quality Quality: High-resolution scanned images of original factory manuals, ensuring clarity of text and diagrams. Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) Searchability Feature: Typically searchable text, allowing quick access to specific topics. ⚙️ Engine Specifications Primary Engine 3 Series Engines: M10 (4-cylinder, e.g., 318i, 320i), M20 (6-cylinder, e.g., 325e, 325i, 335i), M40 (4-cylinder, e.g., 316i, 318i in some markets), M42 (4-cylinder DOHC, 318is). 5 Series Engines: M30 (6-cylinder, e.g., 528e, 535i), M20 (6-cylinder, e.g., 520i, 525i), M40 (4-cylinder, e.g., 518i in some markets). Performance Typical Hp Range: Approximately 105 hp (316i) to 211 hp (535i). Typical Torque Range: Approximately 105 lb-ft to 225 lb-ft. Fuel System Injection Type: Bosch K-Jetronic (CIS), L-Jetronic, and Motronic EFI systems depending on engine and year. Engine Management ECU: Early electronic control units (ECUs) for fuel injection and ignition timing. 🔧 Transmission Standard 3 Series Standard: 4-speed or 5-speed manual transmissions (Getrag 240, 260). 5 Series Standard: 5-speed manual transmissions (Getrag 260, 265). Optional 3 Series Optional: 3-speed or 4-speed automatic transmissions (ZF 3HP22, ZF 4HP22). 5 Series Optional: 4-speed automatic transmissions (ZF 4HP22, GM 4L30-E on some later models). Features Clutch Type: Single dry plate clutch. Fluid Specifications Manual Transmission Fluid: Typically Dexron III/Mercon ATF or specific manual transmission fluid (MTF) depending on transmission type. Refer to manual for exact specification (e.g., BMW MTF LT-2). Automatic Transmission Fluid: Dexron III/Mercon ATF or equivalent. 📐 Dimensions Exterior 3 Series Wheelbase: Approx. 101.2 inches (2570 mm). 5 Series Wheelbase: Approx. 108.7 inches (2760 mm) for E28, 110 inches (2794 mm) for E34. Weights Curb Weight Range: Approx. 2600 lbs (3 Series) to 3400 lbs (5 Series). 🛡️ Safety Features Ratings Crash Test Era: Standards were less stringent than today; focus on structural integrity and occupant protection for the era. Active Features ABS: Anti-lock Braking System (ABS) available as an option on many models, standard on some later high-end variants. Passive Features Airbags: Driver-side airbag introduced as an option in the late 1980s, becoming more common towards the end of this period. Seatbelts: Three-point inertia-reel seatbelts. 💡 Technology Features...