🏷️ Basic Information Identification Make: BMW Model: 840Ci Model Code: E31 Production Years Covered: 1992, 1993, 1994, 1995, 1996 Engine Variants Covered: 4.0L V8 (M60B40) 👋 Introduction Market Position Segment: Luxury Grand Tourer Target Audience: Enthusiasts and owners seeking in-depth technical information for maintenance and repair. Competitive Analysis Competitors Era: Porsche 928, Mercedes-Benz SL-Class (R129), Jaguar XJS. Key Features Vehicle Focus: BMW's flagship coupe and convertible, known for V8 power and sophisticated engineering. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Page Count: 981 Language: English Format: PDF Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed overhaul procedures, component identification, timing belt/chain inspection and replacement, cooling system, lubrication system. Engine Electrical: Ignition system, fuel injection system (DME), sensor diagnostics, starter, alternator, battery management. Transmission Manual: Manual gearbox overhaul, clutch service, driveshafts, differential. Transmission Automatic: Automatic transmission (e.g., 5HP30) overhaul, control systems, fluid service, torque converter. Brakes: Hydraulic system, ABS (Anti-lock Braking System) diagnostics, brake pad and rotor replacement, parking brake. Suspension: Front and rear suspension components, shock absorbers, springs, control arms, wheel alignment specifications. Steering: Power steering system, steering column, steering rack/box. Body And Chassis: Body panel repair, door mechanisms, convertible top operation (if applicable), chassis components, rust prevention. Electrical System: Wiring diagrams, lighting system, power windows, mirrors, central locking, instrument cluster, comfort electronics. Climate Control: HVAC system, refrigerant handling, fan controls, automatic climate control diagnostics. Fuel System: Fuel pump, fuel injectors, fuel filter replacement, evaporative emissions control (EVAP). Exhaust System: Exhaust manifold, catalytic converter, muffler replacement, emissions control components. Procedures Included Routine Maintenance: Oil and filter changes, fluid level checks, spark plug replacement, air filter replacement, brake fluid flush. Troubleshooting: Diagnostic procedures for common faults, fault code interpretation, component testing. Major Repairs: Engine rebuild, transmission overhaul, suspension component replacement, cylinder head service. Component Replacement: Step-by-step guides for replacing major and minor components across all systems. Diagnostic Procedures: Detailed instructions for using diagnostic tools, interpreting sensor data, and pinpointing system faults. Torque Specifications: Precise torque values for critical fasteners across all vehicle systems. Technical Depth Depth Level: Comprehensive Diagnostic Capability: Advanced Rebuild Procedures: Full Wiring Diagrams Detail: High-resolution, system-specific 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text Printability: Printable Print Quality Resolution: High-resolution scans Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: M60B40 Engine Type: V8, Naturally Aspirated Displacement: 3982 cc (4.0 Liters) Bore X Stroke: 84 mm x 90 mm Compression Ratio: 10.0:1 Performance Horsepower Hp: 282 hp @ 5800 rpm Torque Lb Ft: 295 lb-ft @ 4500 rpm Fuel System Fuel Delivery: Bosch Motronic M5.2 Fuel Injection (sequential multi-port) Fuel Type: Premium Unleaded Gasoline (91 octane or higher) Engine Components Block Material: Aluminum Alloy (Nikasil cylinder liners) Cylinder Head Material: Aluminum Alloy Valvetrain: DOHC (Dual Overhead Camshafts), 4 valves per cylinder Timing Mechanism: Timing Chain 🔧 Transmission Standard Transmission Type: 5-Speed Manual (Getrag 420G or ZF S5D 320Z) Optional Transmission Type: 4-Speed Automatic (ZF 4HP24 or 5HP30) Features Automatic Control: Electronic transmission control with sport/economy modes Fluid Specifications Manual Transmission Fluid: BMW MTF LT-2 or equivalent (e.g., Pentosin MTF2) Automatic Transmission Fluid: ZF Lifeguardfluid 5 or equivalent 📐 Dimensions Exterior Length: 192.4 inches (4887 mm) Width: 71.5 inches (1816 mm) Height: 52.2 inches (1326 mm) Wheelbase: 105.9 inches (2690 mm) Weights Curb Weight: Approx. 3800-3900 lbs (1724-1769 kg) 🛡️ Safety Features Ratings Crash Test Data: Limited official data from era, but designed to meet then-current global safety standards. Active Features ABS: Standard (Bosch ABS III) Traction Control: Optional (ASC+T - Automatic Stability Control + Traction) Passive Features Airbags: Driver and passenger airbags (standard from ~1993/1994 onwards) Seatbelts: Front and rear seatbelts with pretensioners Construction: Reinforced safety cell, crumple zones 💡 Technology Features Infotainment Audio System: BMW Bavaria C Business/Professional radio/cassette with optional CD changer. Navigation: Optional BMW Professional Navigation System (early generation) Driver Assistance Cruise Control: Standard electronic cruise control. Connectivity Telephone: Optional integrated car phone (early mobile technology). 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500-10,000 miles or annually, depending on driving conditions. Spark Plug Replacement: Typically around 60,000 miles for iridium or platinum plugs. Transmission Fluid Change: Automatic: every 30,000-60,000 miles; Manual: inspect as needed, change if fluid appears degraded. Coolant Flush: Every 2 years or 30,000 miles. Fluid Specifications Engine Oil Type: SAE 5W-30 or 10W-40 Synthetic (API SJ/CF or higher) Coolant Type: BMW Blue Antifreeze/Coolant or equivalent (G48 specification) Brake Fluid Type: DOT 4 Known Issues Engine Nikasil Wear: Early M60 engines (some 1993 models) with Nikasil cylinder liners could be susceptible to wear from high-sulfur fuel. Later engines used Alusil or bore liners. Cooling System Leaks: Plastic coolant hoses and expansion tanks can degrade over time, leading to leaks. Window Regulators: Electric window regulators can fail, often due to worn plastic...