🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: E21 Model Designation: 320, 323 Generation Generation Name: E21 Codes Chassis Code: E21 👋 Introduction Market Position Target Audience: BMW E21 enthusiasts, DIY mechanics, restoration specialists, independent workshops. Value Proposition: Provides comprehensive repair and maintenance information to empower owners to service their vehicles, avoiding costly shop labor and inferior documentation. Competitive Analysis Differentiation From Competitors: Emphasizes completeness and quality over cheaper, incomplete alternatives. Key Features Ease Of Use: Supplied in easy-to-use PDF format with a superb table of contents for navigation. Empowerment For Owners: Enables owners to 'fix it yourself', fostering a deeper connection with their vehicle. Quality Statement Quality Endorsement: 'Best Manual Available On Tradebit!', 'DO IT RIGHT THE FIRST TIME.' 📋 Manual Details Coverage Areas Model Years Covered: 1975-1983 All Models Covered Within Generation: Yes Page Count Estimated Page Count: Hundreds of pages (specific count not provided, but implied to be extensive) Manual Type Manual Type: Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine overhaul, tuning, fuel injection (Bosch L-Jetronic/K-Jetronic), carburetion (Zenith, Solex), cooling, lubrication, ignition systems, exhaust systems. Transmission Systems: Manual and automatic transmission overhaul, clutch replacement, driveshaft, differential, axle repairs. Braking Systems: Front and rear brake systems (disc and drum), hydraulic circuits, power brake unit, parking brake. Suspension And Steering: Front and rear suspension components (struts, control arms, bushings), shock absorbers, steering gear, power steering (if equipped), wheel alignment. Electrical Systems: Wiring diagrams, battery, charging system (alternator, regulator), starting system, lighting, instrumentation, wipers, horn, power windows (if equipped). Body And Chassis: Body panel repairs, interior trim, seats, doors, windows, convertible top mechanism (if applicable), chassis lubrication, rust prevention. Heating And Ventilation: HVAC system diagnosis and repair, heater core, blower motor, air conditioning (if equipped). Procedures Included Maintenance Procedures: Routine servicing, oil changes, filter replacements, spark plug replacement, brake pad/shoe replacement, fluid checks and top-offs, belt tensioning. Repair Procedures: Detailed step-by-step instructions for component removal, installation, and repair for all major vehicle systems. Rebuilding Procedures: Engine rebuilding, transmission overhaul, differential rebuilds, complete component refurbishment. Troubleshooting Guides: Diagnostic procedures for common problems, fault finding, electrical system diagnostics. Technical Specifications And Data: Torque values, clearances, tolerances, fluid capacities, timing specifications, electrical resistance values. Technical Depth Depth Of Coverage: Comprehensive; covers everything from basic maintenance and troubleshooting to complete engine and transmission rebuilds. Diagnostic Capabilities: Advanced diagnostic procedures, including electrical testing and fuel system analysis. Rebuild Instructions: Detailed instructions for complete engine, transmission, and differential rebuilds, often including specifications for machining. 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Searchability: Likely searchable text-based PDF, enabling quick information retrieval. Print Quality Print Quality Recommendation: High-quality printing recommended for clarity of diagrams and technical drawings. Binding Type Binding Type For Printed Version: Professional binding (e.g., comb binding, spiral binding, perfect binding) is ideal for workshop use to lay flat. Paper Type Paper Type Recommendation: Durable paper stock to withstand workshop environment. Completeness Manual Completeness: Marketed as a 'Complete Manual - No Missing Pages', suggesting it is not a condensed version. Quality Assurance Customer Satisfaction Guarantee: Yes ⚙️ Engine Specifications Primary Engine Engine Family: BMW M10 inline-four cylinder Engine Variants Covered: 320 (typically 1.8L or 2.0L), 323 (typically 2.3L) Performance 320 Engine Displacement Typical: 1.8L (M10B18) or 2.0L (M10B20) 320 Horsepower Typical: Approx. 90-105 hp (depending on market and injection/carburetion) 323 Engine Displacement: 2.3L (M20B23) 323 Horsepower: Approx. 140-145 hp Torque Specifications Details: Detailed torque specifications for all engine fasteners and components will be present. Fuel System Fuel Delivery Systems: Bosch L-Jetronic (later models), Bosch K-Jetronic (early 320i, 323i), Carbureted (Zenith 38/40, Solex C34) variants. Fuel Pump Specifications: Details on fuel pump types, pressures, and testing procedures. Ignition System Ignition System Type: Distributor-based, breaker-point or electronic ignition systems depending on year and model. Timing Specifications: Ignition timing settings for various engine configurations. 🔧 Transmission Standard Standard Transmission: 4-speed manual (Getrag 242 or similar), later 5-speed manual (Getrag 260/5). Optional Optional Transmission: 3-speed ZF automatic transmission. Features Clutch System Details: Hydraulically operated single dry plate clutch, with specifications for adjustment and replacement. Driveshaft And Differential: Information on driveshaft U-joints, balancing, and rear axle differential service, including lubrication and potential rebuilds. 📐 Dimensions Exterior Body Styles: 2-door sedan, 4-door sedan, convertible (rare, often aftermarket or coachbuilt). Wheelbase: Approx. 2564 mm (100.9 in) Overall Length: Approx. 4360 mm (171.7 in) Overall Width: Approx. 1624 mm (63.9 in) Overall Height: Approx. 1380 mm (54.3 in) Weights Curb Weight Typical: Approx. 1100 - 1250 kg (2425 - 2755 lbs), varies by model and equipment. Gross Vehicle Weight Rating: Will be detailed in the manual for payload calculations. Wheel Bolt Pattern: 5x120 Recommended Tire Sizes: Commonly 175/70SR13, 185/70SR13, or 195/70SR14 depending on trim and wheels. Manual will provide definitive fitments. 🛡️ Safety Features Ratings...