🏷️ Basic Information Identification Make: Porsche Model: 928 S4 Years Covered: 1987, 1988, 1989, 1990, 1991 👋 Introduction Market Position Market Position: The Porsche 928 S4 was a luxurious, high-performance grand tourer, positioned as a unique alternative to traditional front-engined sports cars. Competitive Analysis Competitive Analysis: Competed with other luxury GT cars of its era, such as the Jaguar XJS, Aston Martin V8 Vantage, and high-end models from Mercedes-Benz and BMW, offering a distinct rear-engined bias in handling feel despite its front-engine layout. Key Features Key Features: Distinctive transaxle layout for optimal weight distribution, powerful V8 engine, advanced (for its time) chassis and suspension, and a luxurious interior. Manual Value Proposition: Provides essential, in-depth technical information to maintain and repair the sophisticated Porsche 928 S4, crucial for preserving its performance and value. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: PDF Page Count: 2836 Delivery Method: Instant Download Printable: Yes Compatibility: Windows, Mac, Linux OS Required Software: Adobe Reader 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, including disassembly, assembly, timing, lubrication, cooling, fuel injection, ignition, and emissions control systems. Transmission: Automatic transmission (e.g., 4-speed automatic transaxle), including diagnosis, repair, adjustments, and fluid specifications. Drivetrain: Front-wheel drive system, driveshafts, differentials, and associated components. Suspension: Front and rear suspension systems, including components like control arms, struts, springs, shock absorbers, and alignment procedures. Steering: Power steering system, steering rack, linkages, and adjustments. Brakes: Hydraulic brake system, including ABS (Anti-lock Braking System), master cylinder, calipers, rotors, brake lines, and bleeding procedures. Electrical: Complete electrical system, including wiring diagrams, fuse/relay locations, battery, charging system, starting system, lighting, instrumentation, and power accessories. Body: Body and chassis, including exterior panels, doors, windows, sunroof, bumpers, and interior trim removal/installation. Climate Control: Air conditioning (A/C) and heating systems, including components, diagnosis, and refrigerant handling. Fuel System: Fuel tank, fuel pump, fuel lines, fuel injectors, and fuel pressure regulation. Exhaust System: Removal, installation, and troubleshooting of exhaust manifolds, catalytic converters, mufflers, and hangers. Cooling System: Radiator, water pump, thermostat, hoses, fan, and coolant flow diagnosis. Interior Systems: Seat removal, dashboard disassembly, door panel removal, interior trim, and headliner services. Lighting System: Headlights, taillights, interior lighting, and troubleshooting electrical faults related to lighting. Fuel Tank And Lines: Fuel tank removal and installation, fuel line routing, and leak diagnosis. Procedures Included Maintenance: Scheduled maintenance, oil changes, fluid checks, filter replacements, spark plug replacement, and general upkeep. Troubleshooting: Systematic diagnostic procedures for identifying and resolving common and uncommon faults. Repair: Detailed step-by-step instructions for repairing or replacing virtually all vehicle components. Disassembly Assembly: Comprehensive guidance on disassembling and reassembling all major vehicle systems and components. Adjustments: Precise instructions for adjusting various vehicle systems, including engine, transmission, and brakes. Installation: Procedures for installing new or replacement parts and components. Torquing Procedures: Detailed torque specifications for all critical fasteners and threaded connections, essential for proper assembly and preventing damage. Diagnostic Procedures: Methods for diagnosing engine performance issues, electrical faults, and mechanical problems using specified testing procedures and equipment. Technical Depth Depth: Comprehensive 'bumper-to-bumper' coverage, suitable for both professional mechanics and skilled DIY enthusiasts. Diagrams: Detailed illustrations, exploded diagrams, drawings, and photographs to guide repairs. Special Tools: Reference to specific Porsche special service tools (SSTs) and their usage. Specifications: Inclusion of service data, factory specifications, allowable limits, and tightening torques. Safety Precautions: Detailed safety notes, precautions, DANGER, CAUTION, and NOTE advisories for hazardous operations. 📊 Manual Specifications File Format File Format: PDF Print Quality: High-resolution, suitable for printing all 2836 pages. Searchability: Likely text-searchable PDF for efficient information retrieval. Binding Type: N/A (Digital PDF) Paper Type: N/A (Digital PDF) Document Completeness: 100% Complete and Intact, no missing or corrupt pages/sections. ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated V8 Displacement: 5.0 Liters (4957 cc) Bore X Stroke: 100.0 mm x 79.5 mm (approximate) Compression Ratio: 10.0:1 Valve Train: 4 Valves per cylinder, DOHC (Dual Overhead Camshafts) Performance Horsepower: 310 hp @ 6000 rpm (DIN) Torque: 317 lb-ft (430 Nm) @ 3000 rpm (DIN) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection Fuel Type: Premium Unleaded Gasoline (91 Octane or higher) Cooling System Cooling Type: Liquid-Cooled Ignition System Ignition Type: Electronic Ignition 🔧 Transmission Standard Transmission Type: 4-Speed Automatic Transaxle (Standard) Optional Transmission Type Optional: 5-Speed Manual Transaxle (Limited availability, often not specified for S4 models in some markets) Features Transaxle Layout: Rear transaxle design combining transmission and differential for near 50/50 weight distribution. 📐 Dimensions Exterior Length: 4654 mm (183.2 inches) Width: 1785 mm (70.3 inches) Height: 1285 mm (50.6 inches) Wheelbase: 2700 mm (106.3 inches) Front Track: 1490 mm (58.7 inches) Rear Track: 1450 mm (57.1 inches) Weights Curb Weight: Approximately 1650 kg (3638 lbs) for automatic transmission models. Gross Weight Rating: Approx. 2100 kg (4630 lbs) Towing Capacity: Not typically specified or recommended for this...