🏷️ Basic Information Identification Make: BMW Model: 320i Chassis Code: E30 Production Years: 1987-1991 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe/Convertible Target Audience: Enthusiasts, DIY mechanics, and owners seeking to maintain and repair their E30 320i. Competitive Analysis Competitors: Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75. Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel drive, and engaging driving experience. Build Quality: Typical BMW build quality of the era, known for durability and longevity with proper maintenance. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Workshop Manual Language: English Format: Digital Download (e.g., PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine disassembly, assembly, inspection, repair, and tuning for M20B20 engine variants. Engine Management: Bosch L-Jetronic fuel injection system, ignition system diagnostics and repair, sensor identification and testing. Transmission Manual: Repair and maintenance of Getrag 260 5-speed manual transmission, clutch system service, driveshaft and U-joint inspection. Transmission Automatic: Service and repair of ZF 4HP22 4-speed automatic transmission, hydraulic control system, torque converter. Suspension: Front MacPherson strut, rear semi-trailing arm suspension repair, shock absorber replacement, bushing renewal, wheel alignment procedures. Steering: Servotronic power steering system diagnosis and repair, steering rack overhaul, tie rod end replacement. Brakes: Front ventilated disc brakes, rear solid disc brakes service, brake system bleeding, caliper overhaul, ABS system diagnostics (if equipped). Electrical System: Complete wiring diagrams, starter motor, alternator, battery service, fuse and relay identification, lighting system repair, instrument cluster troubleshooting. Body And Chassis: Body panel repair, rust prevention, door and window mechanisms, interior trim removal and installation, bumper repair. Heating Ventilation And Ac: HVAC system diagnosis, blower motor replacement, refrigerant system service (with safety precautions), heater core replacement. Procedures Included Maintenance: Scheduled maintenance, oil change intervals, filter replacement (oil, air, fuel), spark plug replacement, coolant flush, brake fluid service. Troubleshooting: Diagnostic flowcharts for common problems, symptom-based troubleshooting guides, error code interpretation. Repair: Step-by-step repair procedures for all major mechanical and electrical components, including torque specifications and critical measurements. Rebuilding: Detailed instructions for engine and transmission rebuilding, including component specifications and tolerances. Restoration: Guidance on cosmetic and mechanical restoration, including advice on sourcing parts and period-correct finishes. Technical Depth Depth: Comprehensive. Covers everything from routine maintenance to full engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures. 📊 Manual Specifications File Format Format: PDF Searchable: Yes, typically includes searchable text for easy navigation. Print Quality Quality: High-resolution scans, ensuring clarity of text and diagrams. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 Engine Type: Inline 6-cylinder, SOHC Displacement: 1990 cc (2.0 Liters) Performance Horsepower: Approx. 125-129 hp (DIN) @ 6000 rpm Torque: Approx. 170-174 Nm (125-128 lb-ft) @ 4000 rpm Fuel System Injection System: Bosch L-Jetronic (Jetronic K for later models/markets) Fuel Type: Unleaded gasoline (91-95 RON) Ignition System Ignition Type: Electronic Ignition (Distributor based) 🔧 Transmission Standard Type: Getrag 260 5-speed manual Optional Type: ZF 4HP22 4-speed automatic Features Clutch: Hydraulically operated single-plate dry clutch. Differential: Open differential, with limited-slip differential (LSD) as an option. 📐 Dimensions Exterior Length: Approx. 4300-4350 mm (169.3-171.3 in) Width: Approx. 1670-1680 mm (65.7-66.1 in) Height: Approx. 1380-1415 mm (54.3-55.7 in) Wheelbase: Approx. 2570 mm (101.2 in) Weights Curb Weight: Approx. 1200-1300 kg (2645-2866 lbs) 🛡️ Safety Features Ratings Era Compliance: Designed to meet safety standards of its era, including crumple zones. Active Features ABS: Optional Anti-lock Braking System (ABS) available on some models. Passive Features Seatbelts: 3-point inertia reel seatbelts in front, lap belts in rear. Headrests: Front and rear headrests on most models. 💡 Technology Features Infotainment Audio: Factory AM/FM radio with cassette player, optional CD player in later models. Upgradable aftermarket systems. Driver Assistance Cruise Control: Optional cruise control system available on some trims. Connectivity Features: Basic for its era, focusing on mechanical and driver engagement rather than electronic aids. 🔧 Maintenance Service Intervals Oil Change: Recommended every 7,500-10,000 miles (12,000-15,000 km) or 12 months, whichever comes first. Coolant Flush: Every 2-3 years or 30,000 miles (48,000 km). Timing Belt: Crucial to replace every 30,000-40,000 miles (48,000-64,000 km) or 4 years due to interference engine design. Fluid Specifications Engine Oil: API SG or higher, SAE 10W-40 or 15W-40 (check owner's manual for specific climate recommendations). BMW HP-Special or equivalent synthetic. Coolant: BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) or equivalent, mixed 50/50 with distilled water. Brake Fluid: DOT 3 or DOT 4 brake fluid. Transmission Fluid Manual: API GL-4, SAE 75W-90 or 80W-90 gear oil. Transmission Fluid Automatic: Dexron II (or Dexron III as a replacement). Known Issues Rust: Wheel arches, rocker panels, jacking points, and battery tray are common rust areas. Cooling System: Cracked plastic expansion tank, failing water pump, and radiator leaks are common. Fuel Delivery: Failing in-tank fuel pump, clogged fuel filter, and...