🏷️ Basic Information Identification Make: Porsche Model: 928 Model Generation: First Generation Production Years Covered: 1979, 1980, 1981, 1982 Codes Chassis Code: 928 👋 Introduction Market Position Segment: Luxury Grand Tourer (GT) Target Audience: Performance-oriented luxury car buyers, connoisseurs of automotive engineering. Competitive Analysis Key Competitors Era: Ferrari 400 GT, Maserati Ghibli, Jaguar XJS, Aston Martin V8 Vantage. Key Features Design Philosophy: Front-engine, rear-wheel drive transaxle layout, advanced engineering for its time, Porsche's first V8 production car. Manual Utility: Enables owners to perform professional-level maintenance and repairs, saving costs and gaining in-depth knowledge. 📋 Manual Details Coverage Areas Primary Coverage: Porsche 928 Years Covered: 1979-1982 Page Count Estimated Page Count: Extensive (typical for full workshop manuals, often exceeding 1000 pages across multiple volumes) Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete overhaul, diagnostics, tune-ups, fuel system, ignition system, lubrication system, cooling system, exhaust system. Transmission: Removal, installation, overhaul, diagnostics (likely covers both manual and automatic transmissions if offered for these years). Chassis: Suspension, steering system, brakes, wheels, tires. Electrical System: Wiring diagrams, component testing, diagnostics, lighting, instrumentation, starter, alternator, battery. Body: Body panels, doors, windows, interior trim, heating, ventilation, air conditioning (HVAC). Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (if applicable). Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspections. Repair: Component repair and replacement for all major systems, including engine and transmission rebuilds. Installation: Procedures for removing and installing various components and assemblies. Overhaul: Detailed instructions for complete disassembly, inspection, and reassembly of key components. Technical Depth Depth: Comprehensive, suitable for professional technicians and experienced DIY enthusiasts. Covers everything from basic maintenance to full engine and transmission overhauls. Special Emphasis Emphasis: Special aspects of the Porsche 928 product, proprietary component repair instructions. 📊 Manual Specifications File Format Format: PDF Delivery: Electronic, via Email Printability: Yes Print Quality Quality: High-resolution PDF, printable pages. Binding Type Type: N/A (Digital Format) Paper Type Type: N/A (Digital Format) Content Accuracy Assurance: Reliable information, endeavors to ensure accuracy. Symbols Warnings Cautions: Emphasizes information via WARNING, CAUTION, and NOTE. Special Tools Identification: Refers to and illustrates Porsche special tool numbers where applicable. ⚙️ Engine Specifications Primary Engine Type: V8, naturally aspirated, overhead camshafts (SOHC) Displacement Liters: 4.5L (for early models) Displacement Cid: 274.6 cu in Bore X Stroke: 86.0 mm x 77.0 mm (approximate) Performance Horsepower Hp: Approx. 231 hp @ 5500 rpm (US spec, early models) Torque Lb Ft: Approx. 253 lb-ft @ 3600 rpm (US spec, early models) Fuel System Injection: Bosch K-Jetronic (CIS - Continuous Injection System) Engine Management Ignition: Electronic Ignition System Cooling System Type: Water-cooled Engine Codes Early Models: M31.10 (early US spec) 🔧 Transmission Standard Type: 5-speed Manual Transaxle (e.g., G28/09, G28/11) Optional Type: 3-speed Automatic Transaxle (e.g., W3B025, W3A025) Features Layout: Rear Transaxle design combining transmission and differential. Fluid Type Manual Transmission: Hypoid gear oil, SAE 90 (specific Porsche specification recommended, e.g., Esso Gear Oil GL-5 or equivalent) Automatic Transmission: Dexron III or equivalent ATF (Automatic Transmission Fluid) 📐 Dimensions Exterior Length: Approx. 4725 mm (186.0 in) Width: Approx. 1785 mm (70.3 in) Height: Approx. 1310 mm (51.6 in) Wheelbase: Approx. 2700 mm (106.3 in) Weights Curb Weight Kg: Approx. 1580 kg (3483 lbs) (Manual Transmission) Curb Weight Lbs: Approx. 1650 kg (3638 lbs) (Automatic Transmission) Gross Vehicle Weight Rating: Approx. 2000 kg (4409 lbs) 🛡️ Safety Features Ratings Crash Test Era: Testing standards and public reporting were less comprehensive than today. Active Features Brakes: Four-wheel disc brakes (ventilated front, solid rear), ABS not standard on early models. Suspension: Independent suspension front and rear, designed for high-speed stability. Passive Features Seatbelts: Three-point inertia-reel seatbelts. Steering Column: Collapsible steering column. Headrests: Integrated headrests in front seats. 💡 Technology Features Infotainment Audio System: Factory AM/FM radio with cassette player, often with power antenna. Driver Assistance Cruise Control: Standard on most models. Connectivity Early Era: Minimal by modern standards; focus on mechanical engineering. 🔧 Maintenance Service Intervals Oil Change: Typically every 7,500-10,000 miles (or annually), subject to driving conditions. Refer to manual for specific interval. Major Service: At 30,000-50,000 mile intervals, including timing belt inspection/replacement (if applicable to later models, but early models had timing chains), fluid changes, spark plug replacement. Fluid Specifications Engine Oil: API SG/SH or higher, SAE 20W-50 or 15W-40 (check manual for exact Porsche A40 or C30 specification if applicable or manufacturer recommendation). Coolant: Ethylene glycol-based coolant, 50/50 mix with distilled water. Porsche approved coolant recommended. Brake Fluid: DOT 4 or DOT 5.1, low-viscosity, silicone-based fluid. Known Issues Fuel System Cis: Sensitivity to air leaks in the CIS system, requiring precise adjustment and maintenance of injectors, fuel distributor, and air flow meter. Cooling System: Potential for leaks from hoses, water pump, or radiator;...