🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Designation: 320i Generation Generation Name: E30 Codes Chassis Code: E30 👋 Introduction Market Position Positioning: The BMW 3 Series (E30) was a highly successful compact executive car, known for its sporty handling and build quality. The 320i variant offered a balance of performance and efficiency for its time. Competitive Analysis Competitors: Primary competitors included the Mercedes-Benz 190E, Audi 80/90, and Alfa Romeo 75. Key Features Vehicle Attributes: Rear-wheel drive, balanced chassis, driver-focused interior, robust engineering. Manual Value Proposition Value For Buyer: This manual provides comprehensive, detailed, and accurate information for servicing and repairing the BMW 320i (E30) from 1987-1991, enabling DIY enthusiasts and professional mechanics to perform tasks efficiently and correctly, ensuring vehicle reliability and longevity. 📋 Manual Details Coverage Areas Applicable Years: 1987, 1988, 1989, 1990, 1991 Page Count Total Pages: 225 Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel injection, ignition, exhaust Transmission: Manual transmission (Getrag 260), clutch, driveline Suspension: Front suspension (MacPherson strut), rear suspension (Semi-trailing arm), steering system Brakes: Front disc brakes, rear drum brakes (or disc brakes on some models), parking brake, hydraulic system Electrical: Battery, charging system, starting system, lighting, instrumentation, fuses, relays, engine management electronics, body electronics Bodywork: Exterior body panels, interior trim, doors, windows, locks, glass, bumpers Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement Troubleshooting: Diagnostic procedures for engine, electrical, and mechanical issues, symptom-based troubleshooting guides Repair: Component removal, disassembly, repair, reassembly, and installation procedures for all major systems Adjustments: Valve adjustments, timing belt adjustments, brake adjustments, headlight aiming, idle speed adjustments Technical Depth Depth: Comprehensive, from basic maintenance to in-depth engine and transmission overhaul, including diagnostic procedures and specifications 📊 Manual Specifications File Format Printability: Yes, all pages printable Searchability: Likely text-searchable PDF, common for modern digital manuals Print Quality Quality Description: High-resolution PDF suitable for clear viewing and printing. Contains detailed illustrations, exploded diagrams, and photos. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Compatibility Operating Systems: Windows, Mac, Linux OS Requirements Software Requirement: Adobe Reader ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 (most common for 320i) Engine Type: Inline 6-cylinder, SOHC Displacement: 1990 cc (2.0 Liters) Performance Horsepower: Approx. 125-129 hp @ 6000 rpm (varies slightly by market/configuration) Torque: Approx. 170-174 Nm (125-128 lb-ft) @ 4300 rpm (varies slightly) Fuel System Fuel Delivery: Bosch LE-Jetronic or L-Jetronic fuel injection Other Specs Bore X Stroke: 80.0 mm x 66.0 mm Compression Ratio: 8.8:1 or 9.7:1 (depending on specific variant) 🔧 Transmission Standard Type: Getrag 260 5-speed manual transmission Optional Type: ZF 4HP22 4-speed automatic transmission Features Clutch Type: Hydraulically operated single dry plate clutch Driveline Drive Type: Rear-wheel drive 📐 Dimensions Exterior Length: Approx. 4325 mm (170.3 in) Width: Approx. 1675 mm (65.9 in) Height: Approx. 1380 mm (54.3 in) Weights Curb Weight: Approx. 1180-1250 kg (2600-2750 lbs) depending on transmission and options Wheelbase: 2570 mm (101.2 in) 🛡️ Safety Features Passive Features Seat Belts: 3-point front seat belts, 2-point rear lap belts (3-point belts became more common later in the E30 lifecycle) Body Structure: Reinforced safety cage, crumple zones Active Features Brakes: Front ventilated discs, rear drums (standard); ABS available as an option on later models 💡 Technology Features Infotainment Audio System: Typically a factory-installed radio/cassette player with basic speaker setup. Options for upgraded systems existed. Driver Assistance Driver Aids: Limited by modern standards. Optional ABS was available on some later models. Features like traction control were not common for this generation. Convenience Convenience Features: Power windows (optional), power steering, central locking (optional), sunroof (optional). 🔧 Maintenance Service Intervals Oil Change Interval: Typically 7,500-10,000 miles (12,000-16,000 km) or annually, as per owner's manual recommendations. Timing Belt Replacement: The M20 engine uses a timing belt, typically recommended for replacement every 30,000-50,000 miles (50,000-80,000 km) or 4-5 years. Fluid Specifications Engine Oil: API SG or higher, SAE 15W-40 or 10W-40 (check manual for exact viscosity based on climate). Capacity ~4.5 Liters (4.8 US Quarts). Coolant: BMW Blue Antifreeze/Coolant (Glysantin G48 equivalent), 50/50 mixture with distilled water. Capacity ~7.5 Liters (8 US Quarts). Transmission Fluid Manual: API GL-4, SAE 75W-90 or 80W-90 gear oil. Capacity ~1.75 Liters (1.85 US Quarts). Brake Fluid: DOT 3 or DOT 4 brake fluid. Known Issues Common Problems: Heater control valve leaks, dashboard cracks, injector seal leaks, fuel pump failure, rust (especially around wheel arches and sills), aging rubber components (bushings, hoses), oil leaks from engine seals (e.g., front crank seal, oil pan gasket). Parts Guidance Part Replacement Strategy: Emphasizes using correct OEM or equivalent parts. Use of incorrect or makeshift tools can damage components or compromise safety. Torque specifications...