🏷️ Basic Information Identification Make: Porsche Model: 911 Carrera 4 Generation: 964 Chassis Code: 964 👋 Introduction Market Position Segment: High-performance luxury sports car. Competitive Analysis Competitors Era: Competed with other iconic sports cars of the late 1980s and early 1990s such as Ferrari 348, Chevrolet Corvette C4, and Nissan 300ZX. Key Features Powertrain Layout: Rear-engine, all-wheel-drive (Carrera 4) configuration. Design Philosophy: Evolutionary design from the original 911, incorporating modern aerodynamics and technology while retaining classic styling cues. Carrera 4 Distinction: The Carrera 4 variant introduced a sophisticated all-wheel-drive system to the 911 lineage, enhancing traction and stability. 📋 Manual Details Coverage Areas Model Years Covered: 1989, 1990, 1991, 1992, 1993, 1994 Page Count Total Pages: 1332 Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Detailed coverage of the 3.6L flat-six engine, including lubrication, cooling, fuel injection, ignition, and emissions systems. Powertrain: Comprehensive coverage of the all-wheel-drive system (Carrera 4), including front axle, transfer case, and power distribution. Transmission: Detailed procedures for the G50 manual transmission, including clutch, synchronizers, and shifting mechanisms. Coverage may extend to Tiptronic if applicable to the specific model year range and market. Suspension: In-depth information on the front and rear suspension systems, including McPherson struts, control arms, coil springs, shock absorbers, and anti-roll bars. Brakes: Complete brake system diagnostics and repair, including ABS (Anti-lock Braking System) if equipped, brake fluid, calipers, rotors, pads, lines, and master cylinder. Steering: Coverage of the power steering system, including the pump, reservoir, hoses, and steering rack. Electrical System: Extensive coverage of the vehicle's electrical system, including battery, charging system, starter, lighting, ignition switch, wiring diagrams, fuses, relays, and electronic control units (ECUs). Bodywork: Information on body panel removal and installation, door mechanisms, glass, seals, and collision repair basics. HVAC: Details on the heating, ventilation, and air conditioning (HVAC) system, including refrigerant, compressor, condenser, evaporator, and climate controls. Interior: Procedures for interior trim removal, seat adjustments, dashboard components, and interior lighting. Procedures Included Maintenance: Detailed periodic maintenance procedures, fluid changes, filter replacements, and lubrication schedules. Troubleshooting: Comprehensive diagnostic flowcharts, common problem identification, and step-by-step troubleshooting guides for various systems. Repair: Step-by-step instructions for removing, disassembling, repairing, assembling, and installing major components and sub-assemblies. Adjustments: Procedures for adjusting ignition timing, fuel mixture, valve clearances (if applicable to the specific engine variant), clutch, and parking brake. Diagnostics: Information on diagnostic tools, fault code reading (if applicable), and system testing procedures. Wiring Diagrams: Detailed electrical schematics and wiring diagrams for all vehicle systems. Special Tools: Identification and usage instructions for specialized tools required for specific repair and maintenance tasks. Technical Depth Depth: Comprehensive 'bumper-to-bumper' coverage suitable for both professional mechanics and advanced DIY enthusiasts. Detail Level: Includes detailed explanations, step-by-step procedures, and pictorial diagrams (illustrations, exploded views, photos). Data Accuracy: Provides service data, specifications, tightening torques, wear limits, and allowable tolerances based on factory information. 📊 Manual Specifications File Format Printability: Yes, all pages are printable. Readability Requirement: Adobe Reader Compatibility: Windows, Mac, and Linux operating systems. Print Quality Resolution: High-resolution PDF suitable for clear viewing and printing. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally aspirated, air-cooled flat-six (Boxer) Displacement: 3.6 liters (3600 cc) Bore X Stroke: 100.0 mm x 76.4 mm (approximate) Compression Ratio: 10.3:1 (typical for this generation) Performance Horsepower: 250 PS (184 kW; 247 hp) at 6100 rpm (approximate, may vary slightly by year) Torque: 315 Nm (232 lb-ft) at 4800 rpm (approximate, may vary slightly by year) Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection (EFI) with individual spark plugs for each cylinder. Fuel Type: Unleaded gasoline, typically 91 octane or higher. Cooling System Cooling Type: Air-cooled, with oil cooling for the engine block and an oil cooler in the front bumper. 🔧 Transmission Standard Transmission Type: Porsche G50 5-speed manual transaxle Optional Tiptronic: Optional Tiptronic automatic transmission available on some models within this range, though less common for the Carrera 4 in the early years. Features All Wheel Drive System: Viscous coupling limited-slip center differential for power distribution to front and rear axles. 📐 Dimensions Exterior Length: Approximately 4250 mm (167.3 in) Width: Approximately 1775 mm (69.9 in) Height: Approximately 1310 mm (51.6 in) Weights Curb Weight: Approximately 1450-1500 kg (3197-3307 lb), depending on options and specific year. 🛡️ Safety Features Ratings Crash Testing: Limited public crash test data available for this specific era; rely on Porsche's internal safety engineering and design principles. Active Features ABS: Anti-lock Braking System (ABS) typically standard or optional depending on market and model year. Passive Features Airbags: Driver-side airbag standard from early in the generation; passenger airbag became standard later in the production run. Seatbelts: Three-point inertia-reel seatbelts with pre-tensioners. Structural Integrity: Reinforced chassis and...