🏷️ Basic Information Identification Make: BMW Model: 6 Series Model Variant: 635CSi Year: 1985 Codes Chassis Code: E24 👋 Introduction Market Position Target Audience: Technicians, mechanics, DIY enthusiasts, and anyone interested in repairing or understanding the BMW E24 635CSi. Key Features Primary Benefit: Provides comprehensive electronic troubleshooting information to aid in diagnosing and repairing complex vehicle systems. Content Authenticity: Maintains technical data as per the original manufacturer's specifications. Value Proposition Pricing Access: Offered at a low price with instant download access, saving time and effort compared to sourcing physical manuals. 📋 Manual Details Coverage Areas Primary Coverage: Electronic Troubleshooting Secondary Coverage: General Maintenance, Engine Service, Transmission Service, Brake System, Wiring Diagrams, Electrical Systems, Suspension, Periodic Lubrication, Steering, Cooling System, Fuel Injection, Fuel System, Emission System, HVAC, Engine Control Systems, Chassis/Body, Restraint Systems, Interior, Differential/Drive, Axle Page Count Estimated Page Count: Hundreds to Thousands (printable at great quality) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Management: Detailed coverage of fuel injection, ignition, and engine control systems, including electronic troubleshooting for sensors, actuators, and ECUs. Electrical System: Comprehensive electrical system diagnostics, including wiring diagrams, component testing, and troubleshooting of power distribution, lighting, and auxiliary systems. Transmission: Service and repair procedures for the automatic transmission, including troubleshooting of electronic control components and hydraulic circuits. Brakes: Diagnostic information for the hydraulic and potentially ABS (if equipped) brake systems, focusing on electronic control and troubleshooting. Suspension Steering: Troubleshooting guidance for suspension and steering components, including hydraulic or electronic power steering systems if applicable. Cooling Fuel Exhaust: Diagnostic procedures for the cooling system, fuel system (including injection), and emission control systems. Comfort Controls: Troubleshooting for HVAC (Heater/Air Conditioning) systems and interior electronics. Procedures Included Troubleshooting: Systematic diagnostic procedures, fault code interpretation (if applicable), and step-by-step troubleshooting trees for electronic and mechanical issues. Repair: Detailed repair instructions for various components and systems, often including component removal, installation, and adjustment. Maintenance: General maintenance tasks, periodic lubrication, and fluid specifications. Wiring Diagrams: Complete and detailed electrical wiring schematics for all vehicle systems. Technical Depth Diagnostic Capability: Advanced diagnostic procedures, likely requiring specialized tools for electronic systems, mirroring factory technician capabilities. Component Level: Detailed information on individual component testing, specifications, and potential failure modes. 📊 Manual Specifications File Format Format Details: PDF files, some potentially requiring unzipping for larger manuals. Compatible with all versions of Windows & Mac. Print Quality Quality: Printable at GREAT QUALITY, ensuring clarity of diagrams and text. Binding Type Binding: Digital Download (not a physical book) Paper Type Paper Type: N/A (Digital) Requirements Software Requirements: Adobe PDF Reader, WinZip (for larger files). ⚙️ Engine Specifications Primary Engine Engine Code: M30B34 Engine Type: Inline 6-cylinder, SOHC Displacement: 3.4 liters (3430 cc) Performance Horsepower: Approx. 218 hp @ 5700 rpm (European spec, US spec may differ slightly) Torque: Approx. 224 lb-ft (304 Nm) @ 4000 rpm (European spec, US spec may differ slightly) Fuel System Injection System: Bosch L-Jetronic fuel injection Engine Control System ECU: Motronic (early integrated engine management system) 🔧 Transmission Standard Type: ZF 4HP22 4-speed automatic transmission Optional Type: Getrag 265 5-speed manual transmission Features Automatic Control: Electronically controlled automatic transmission with adjustable driving modes (e.g., Sport/Economy in some models). Fluid Specifications Automatic Transmission Fluid: Dexron II (or equivalent) 📐 Dimensions Exterior Length: Approx. 191.9 inches (4874 mm) Width: Approx. 70.5 inches (1791 mm) Height: Approx. 52.9 inches (1344 mm) Weights Curb Weight: Approx. 3570 - 3700 lbs (1619 - 1678 kg, depending on transmission and options) Wheels Tires Wheel Bolt Pattern: 5x120mm Standard Tire Size: 205/70VR14 or 225/60VR14 (may vary by market and option) 🛡️ Safety Features Passive Features Seatbelts: 3-point front and rear seatbelts. Body Structure: Reinforced passenger safety cell, crumple zones. Active Features ABS: Anti-lock Braking System (ABS) was an optional feature on many 1985 models. 💡 Technology Features Infotainment Audio System: Premium sound systems were often optional, featuring cassette players and multiple speakers. Driver Assistance Cruise Control: Standard on most 635CSi models, electronically controlled. Comfort Features Climate Control: Optional automatic climate control (ECC - Electronic Climate Control) with manual override. 🔧 Maintenance Service Intervals Oil Change: Typically every 5,000-7,500 miles or annually (refer to specific manual for exact mileage). Spark Plugs: Recommended replacement at approximately 30,000 miles. Fluid Specifications Engine Oil: SAE 20W-50 or SAE 15W-40 (check manual for specific viscosity based on temperature). Coolant: BMW Blue/Green coolant (50/50 mix with distilled water). Brake Fluid: DOT 4 Known Issues Electrical Connectors: Degradation of electrical connectors and wiring insulation, leading to intermittent faults. Fuel System: Clogged fuel injectors, failing fuel pump, or faulty fuel pressure regulator. Cooling System: Leaking coolant hoses, radiator, or water pump; thermostat failure. Suspension: Wear in control arm bushings, ball joints, and shock absorbers. Part Numbers Air Filter: Example: Mann-Filter C 31 224 / 1 Oil...