🏷️ Basic Information Identification Make: BMW Model: 320i Chassis Code: E30 Model Years Covered: 1987-1991 Codes Engine Code Common: M20B20 👋 Introduction Market Position Positioning: The BMW E30 3 Series is a highly regarded compact executive car known for its driving dynamics and build quality. The 320i variant represents a strong mid-range offering within the E30 lineup. Competitive Analysis Competitors: Competed with vehicles like the Mercedes-Benz 190E, Audi 80/90, and Alfa Romeo 75. Key Features Design Philosophy: Focus on driver engagement, balanced chassis, and sophisticated engineering typical of BMW. Manual Value Proposition: Provides comprehensive, specific repair and maintenance information essential for preserving the longevity and performance of the E30 320i. 📋 Manual Details Coverage Areas Manual Type: Service Repair Manual Language: English Format: PDF (Digital Download) Delivery: Instant Download Compatibility: PC/MAC Compatible Page Count: Not Specified (Comprehensive) 📖 Manual Coverage Systems Covered Engine: Complete overhaul, disassembly, assembly, troubleshooting, diagnostics Fuel System: Fuel pump, injectors, fuel lines, pressure regulator, fuel tank Lubrication: Oil pump, oil cooler, lubrication passages, oil filter replacement Cooling System: Radiator, water pump, thermostat, coolant hoses, fan operation Ignition System: Distributor, spark plugs, ignition coils, timing adjustment Electrical System: Battery, charging system (alternator), starter motor, wiring diagrams, switches, lighting Transmission Manual: Clutch, gearshift linkage, transmission overhaul, fluid changes Transmission Automatic: Transmission removal/installation, fluid services, torque converter (if applicable, specific to model variant) Suspension Front: Wheel bearings, control arms, shock absorbers, struts, steering components Suspension Rear: Shock absorbers, trailing arms, springs, differential mounting Brakes Hydraulic: Brake pads, rotors, calipers, master cylinder, brake lines, bleeding procedures Steering: Steering rack, tie rods, power steering system (if applicable) Bodywork: Body panel removal/installation, door mechanisms, window regulators Interior: Seat removal/installation, dashboard components, trim panels Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks Repair: Component replacement, rebuilding procedures, fault diagnosis Diagnostics: Troubleshooting guides, common problems and solutions, symptom-based analysis Rebuilding: Engine rebuild, transmission rebuild, differential overhaul Electrical Troubleshooting: Step-by-step wiring diagnostics, component testing Installation: Engine installation, transmission installation, major component replacement Technical Depth Depth: Comprehensive workshop level, suitable for DIY mechanics and professional technicians Diagrams: Detailed step-by-step diagrams and illustrations for all procedures Electrical Diagrams: Full electrical schematics for all vehicle systems Specifications: Torque specifications, clearances, measurements, tolerances 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (typically, depending on OCR quality) Printable: Yes (print selected pages or entire manual) Zoom Functionality: Yes Print Quality Quality Description: Clear, easy-to-read text and diagrams Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, DOHC (M20 series) Displacement Cc: 1990 cc (2.0 Liters) Bore X Stroke: 80.0 mm x 66.0 mm (approx.) Compression Ratio: 8.8:1 to 10.5:1 (depending on specific variant/market) Performance Horsepower Ps: Approx. 125-129 PS @ 6000 rpm Torque Nm: Approx. 174-180 Nm @ 4300 rpm Fuel System Fuel Delivery: Bosch L-Jetronic or Motronic fuel injection Fuel Type: Unleaded gasoline (Octane rating specific to market) Lubrication Oil Capacity Liters: Approx. 4.25 Liters (without filter change) Recommended Oil Viscosity: 10W-40 or 15W-50 (check manual for specific climate recommendations) 🔧 Transmission Standard Type: 4-speed or 5-speed Manual Transmission Optional Type: 3-speed or 4-speed Automatic Transmission (ZF) Features Clutch Type: Single dry plate, hydraulically operated Transmission Fluid Type Manual: BMW MTF LT-2 or equivalent (e.g., Pentosin) Transmission Fluid Capacity Manual Liters: Approx. 1.5 Liters 📐 Dimensions Exterior Length Mm: 4325 mm Width Mm: 1680 mm Height Mm: 1380 mm Weights Curb Weight Kg: Approx. 1150-1250 kg Wheelbase Mm: 2570 mm Wheel Bolt Pattern: 5 x 120 mm Wheel Offset Et: ET 12 to ET 22 (common) 🛡️ Safety Features Ratings Crash Testing Era: Era specific, likely not rated by modern standards like NHTSA or Euro NCAP. Active Features Brakes: Front: Ventilated Discs, Rear: Discs (standard on most models, or drums on base models) Steering: Recirculating ball steering (with optional power steering) Passive Features Seatbelts: 3-point front seatbelts, 2-point rear seatbelts Body Structure: Reinforced safety cage, crumple zones 💡 Technology Features Infotainment Radio: Factory fitted analogue or early digital tuning radios, often with cassette players. Speakers: Typically 2 or 4 speaker systems. Driver Assistance ABS: Optional on some models, standard on later variants. Connectivity Connectivity Era: Limited connectivity by modern standards; primarily analogue systems. 🔧 Maintenance Service Intervals Oil Change Km Miles: Typically every 10,000-15,000 km or 6,000-10,000 miles (refer to manual for precise recommendations). Air Filter Replacement Km Miles: Every 20,000-30,000 km or 12,000-18,000 miles. Spark Plug Replacement Km Miles: Every 30,000-50,000 km or 18,000-30,000 miles. Fluid Specifications Coolant Type: BMW Blue Antifreeze/Coolant or equivalent G11 type (Ethylene Glycol based). Brake Fluid Type: DOT 4 Power Steering Fluid Type: ATF Dexron III or Pentosin CHF 11S (check specific model variant for exact spec). Known Issues Common E30 Issues: Cooling system component failure (radiator, hoses, water pump), fuel distributor issues, differential seal...