🏷️ Basic Information Identification Make: Porsche Model: 928 Applicable Years: 1978-1994 Codes Internal Model Code: 928 Series 👋 Introduction Market Position Historical Positioning: Porsche's front-engine, V8 grand tourer designed to compete with luxury GTs from Jaguar, BMW, and Mercedes-Benz, showcasing advanced technology and performance for its era. Competitive Analysis Competitors: Jaguar XJ-S, BMW 6 Series (E24), Mercedes-Benz SLC/SL (R107) Key Features Engineering Philosophy: Transaxle layout for optimal weight distribution, aluminum V8 engine, advanced suspension systems, luxurious interior, and potent grand touring capabilities. Target Audience Manual User: Porsche 928 owners, independent repair shops, automotive technicians specializing in vintage European sports cars. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive workshop and repair information Secondary Coverage: Maintenance, troubleshooting, diagnostics, electrical diagrams, exploded views Page Count Estimated Total Pages: 4000+ Manual Type Manual Type: Workshop Manuals / Service Manuals / Repair Manuals Language Language: English Format File Format: ZIP Archive containing PDF files 📖 Manual Coverage Systems Covered Powertrain: Engine (V8 variants: 4.5L, 4.7L, 5.0L, 5.4L), Fuel System (CIS, EFI), Cooling System, Exhaust System, Transmission (Manual, Automatic - 3-speed, 4-speed, 5-speed OD) Chassis: Suspension (Front Transaxle, Rear Trailing Arm, McPherson Struts), Steering (Power Steering), Brakes (ABS, Vented Discs Front/Rear), Wheels and Tires Electrical: Complete wiring diagrams for all model years, Lighting, Ignition System, Starting and Charging System, HVAC Controls, Instrumentation, Power Accessories (Windows, Seats, Mirrors) Body: Body Panels, Doors, Hood, Trunk, Glass, Bumpers, Aerodynamics, Interior Trim, Upholstery Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, belt inspections and replacement, fluid checks and top-offs Major Repairs: Engine teardown and rebuild, transmission overhaul, suspension component replacement, brake caliper and rotor service, fuel injection system diagnosis and repair Diagnostics: Troubleshooting guides for common drivability issues, electrical faults, HVAC problems; diagnostic codes and procedures Special Tools: Identification of and procedures for using specialized Porsche factory tools Technical Depth Depth Level: Comprehensive factory-level detail, suitable for professional technicians and advanced DIY enthusiasts Diagnostic Coverage: Detailed diagnostic trees and component testing procedures Rebuild Procedures: Step-by-step instructions for complete engine and transmission rebuilds with torque specifications 📊 Manual Specifications File Format PDF Quality: High-resolution, scannable text, bookmark functionality (where applicable within PDFs) Searchable Text: Yes, within individual PDF documents Print Quality Printable: Yes, individual PDFs can be printed Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Family: Porsche V8 (M28 Series) Displacement Early: 4.5 Liters (4477 cc) Displacement Mid: 4.7 Liters (4664 cc) Displacement Late: 5.0 Liters (4957 cc) - S/S2/GT, 5.4 Liters (5349 cc) - GTS Performance Horsepower Range: 219 hp (early US) to 326 hp (GTS) Torque Range: 245 lb-ft (early US) to 362 lb-ft (GTS) Fuel System Fuel Delivery Early: Bosch K-Jetronic (CIS) Mechanical Fuel Injection Fuel Delivery Late: Bosch Motronic Electronic Fuel Injection (EFI) Engine Construction Block Material: Aluminum Alloy Head Material: Aluminum Alloy Valvetrain: SOHC (Single Overhead Camshaft) per bank, 2 valves per cylinder (later SOHC, 4 valves per cylinder - '928 M28/36 - 32V') Engine Cooling Cooling System: Liquid-cooled, front-mounted radiator 🔧 Transmission Standard Transmission Type Early: 4-Speed Automatic (e.g., ZF 4HP22) Optional Transmission Type Late: 5-Speed Manual (e.g., 016) or 4-Speed Automatic Features Transaxle Design: Rear-mounted transaxle integrating transmission and differential for 50/50 weight distribution. Fluid Specifications Automatic Transmission Fluid: Dexron III or equivalent (refer to specific model year for exact spec) Manual Transmission Fluid: GL-4 Hypoid Gear Oil (e.g., 75W-90, refer to manual for exact spec) Gear Ratios Manual Gear Ratios: Varies by model year (e.g., 1st: 3.09, 2nd: 1.79, 3rd: 1.26, 4th: 1.00, 5th: 0.82 for some models) 📐 Dimensions Exterior Length: Approx. 4650-4800 mm (depending on year and bumper style) Width: Approx. 1780-1800 mm Height: Approx. 1280-1320 mm Wheelbase: Approx. 2430-2435 mm Weights Curb Weight: Approx. 1500-1700 kg (depending on configuration) Gross Vehicle Weight Rating: Approx. 1900-2000 kg Cargo Rear Luggage Capacity: Substantial for a GT, with a large rear hatch area. 🛡️ Safety Features Ratings Crash Test Data: Limited official NHTSA/Euro NCAP data available for early models due to testing standards of the era; known for robust construction. Active Features ABS: Anti-lock Braking System (ABS) available on later models (e.g., from 1985/1986 onwards) Passive Features Airbags: Driver's side airbag introduced on later models. Seatbelts: 3-point inertia reel seatbelts with pretensioners (on later models). Chassis Design: Reinforced safety cage, crumple zones 💡 Technology Features Infotainment Audio System: Factory-installed premium sound systems (e.g., Blaupunkt), often with optional CD changers in later models. Climate Control: Automatic Climate Control (ACC) on later models, Manual HVAC on earlier models. Driver Assistance Cruise Control: Standard on most models. Headlights: Pop-up headlamps with electric motors, integrated fog lights on many models. Connectivity Onboard Diagnostics: Limited OBD-I diagnostics on later models, requiring specific Porsche diagnostic tools for comprehensive analysis. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500-10,000 miles or 1 year, whichever...