🏷️ Basic Information Identification Make: Porsche Model: 911 Carrera 4 Generation: 964 Codes Chassis Code: 964 👋 Introduction Market Position Segment: Premium Sports Car Target Audience: Enthusiast owners, independent repair shops, collectors Competitive Analysis Key Competitors: Ferrari 348, Chevrolet Corvette ZR-1 (C4), Lotus Esprit Turbo S Key Features Unique Selling Points: All-wheel drive system (Carrera 4), legendary Porsche engineering and performance, iconic 911 silhouette. Manual Value Value Proposition: Provides professional-grade repair and maintenance information, saving time and money on dealership services. Enables owners to perform in-depth work with confidence. 📋 Manual Details Coverage Areas Model Years: 1989, 1990, 1991, 1992, 1993, 1994 Variants Covered: All Models, Engines, Trim, Transmissions Page Count Estimated Pages: Hundreds of pages (specific count not provided, but described as extensive) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Engine Service/Repair, Engine Control System, Fuel Injection/Fuel System, Cooling System Drivetrain: Transmission Service/Repair, Differential/Drive, Axle Chassis: Brake System, Suspension, Steering, Chassis/Body Electrical: Electrical System, Wiring Diagram, Engine Control System Comfort And Safety: Heater/Air Conditioning, Restraint System, Interior Procedures Included Maintenance: General Maintenance, Periodic Lubrication, Emission System Maintenance Repair: Engine Repair, Transmission Repair, Brake Repair, Suspension Repair, Steering Repair, Electrical System Repair, HVAC Repair, Bodywork Repair Diagnostics: Troubleshooting, Diagnostic Procedures, Electrical System Diagnostics Technical Depth Depth: Comprehensive: Step-by-step procedures, detailed diagrams, illustrations, photos, notes, cautions, and warnings. Covers basic maintenance to complete rebuilds. 📊 Manual Specifications File Format Format: PDF Accessibility: Searchable Text, Zoom IN/OUT capable Print Quality Printability: Full Printable Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated 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) Valve Train: Belt-driven Double Overhead Camshafts (DOHC), 2 valves per cylinder Performance Horsepower: 250 PS (247 hp; 184 kW) at 6100 rpm (Early models); 272 PS (268 hp; 200 kW) (Later models) Torque: 312 Nm (230 lb-ft) at 4800 rpm (Early models); 330 Nm (243 lb-ft) at 4800 rpm (Later models) Fuel System Fuel Delivery: Bosch Motronic Engine Management with Multi-point Fuel Injection Fuel Type: Unleaded Gasoline (Premium Unleaded Recommended) 🔧 Transmission Standard Transmission Type: 5-Speed Manual (G50 Gearbox) Optional Transmission Type: Tiptronic Automatic (Limited availability, introduced later in the generation) Features All Wheel Drive: Standard on Carrera 4 models. Viscous coupling (VC) center differential. 📐 Dimensions Exterior Length: 4250 mm (167.3 in) Width: 1650 mm (65.0 in) Height: 1310 mm (51.6 in) Wheelbase: 2272 mm (89.4 in) Weights Curb Weight: Approximately 1450 kg (3197 lbs) for Carrera 4 Coupe 🛡️ Safety Features Ratings Crash Testing: Limited official crash test data from this era compared to modern vehicles. Porsche emphasized structural integrity. Active Features Braking System: 4-wheel Anti-lock Braking System (ABS), ventilated discs. Drivetrain: All-wheel drive for enhanced traction and stability. Passive Features Airbags: Driver-side airbag (standard from 1990 onwards). Seat Belts: 3-point inertia-reel seat belts 💡 Technology Features Infotainment Audio System: Factory-installed stereo systems (e.g., Porsche CR-210, CR-212) with cassette player. Optional CD changer. Driver Assistance ABS: Anti-lock Braking System (ABS) is a primary driver assistance feature. Connectivity Connectivity Features: Limited to basic audio connectivity. No integrated Bluetooth or USB ports in original configuration. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000 km (6,000 miles) or 1 year, whichever comes first. Consult manual for specific details. Major Service Interval: Major services typically at 40,000 km (25,000 miles) intervals, including spark plugs, belts, and more comprehensive checks. Consult manual. Fluid Specifications Engine Oil Type: Porsche A40 or equivalent synthetic oil (e.g., Mobil 1 0W-40, Castrol Syntec 5W-50). Check manual for exact specification. Transmission Fluid Type: GL-5 Gear Oil (specific viscosity as per manual, e.g., SAE 75W-90 or 75W-140). Brake Fluid Type: DOT 4 or DOT 5.1 Brake Fluid (ensure compatibility). Known Issues Common Wear Items: Clutch wear, suspension bushings, power steering leaks, oil cooler leaks, rear main seal leaks, intake air leaks (vacuum hoses). Electrical Issues: Wiring harness degradation, DME relay issues, alternator problems. Engine Component Wear: Valve adjustment requirements, potential for IMS bearing failure (less common in early 964s compared to later models, but still a consideration). 📚 Vehicle History Brand Heritage Marque Legacy: Porsche is renowned for its engineering prowess, motorsports success, and iconic sports car designs. Model Evolution 911 Lineage: The 964 generation represented a significant modernization of the original 911 concept, introducing a new chassis and more advanced technology while retaining the core identity. Carrera 4 Introduction: The Carrera 4 variant was a key introduction for the 964 generation, bringing all-wheel drive to the 911 line for improved stability and performance in various conditions. Production...