🏷️ Basic Information Identification Make: Porsche Model: 928 Year: 1978-1980 Generation Code: First Generation (S1) 👋 Introduction Market Position Positioning: Specialized technical data for the Porsche 928, catering to enthusiasts, professional mechanics, and restoration specialists. Competitive Analysis Uniqueness: Focuses specifically on dimensions and tolerances, a critical but often overlooked aspect of restoration and repair, differentiating it from general service manuals. Key Features Target Audience: Restorers, body shops, discerning owners focusing on concours-level perfection. Benefit: Ensures factory-correct fit and finish, preventing costly errors and improving the integrity of repairs and restorations. 📋 Manual Details Coverage Areas Primary Focus: Dimensions and Tolerances Page Count Estimate: Not specified, but comprehensive for dimensions and tolerances Manual Type Type: Technical Service Manual / Repair Manual / Workshop Manual Language Language: English (assumed, typical for primary market manuals) Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Body And Chassis: Body panel fitment, chassis alignment, structural component tolerances, door/hood/trunk alignment, glass installation tolerances, bumper alignment. Engine And Powertrain Mounting: Engine and transmission mounting point alignment and tolerances, subframe mounting specifications. Suspension And Steering Alignment: Suspension component mounting tolerances, steering rack mounting specifications, wheel alignment parameters. Interior Trim And Components: Dashboard fitment, console alignment, seat mounting tolerances, interior panel clearances. Procedures Included Measurement And Verification: Detailed instructions on measuring critical dimensions and checking for deviations from factory specifications. Repair And Adjustment: Guidance on adjusting body panels, subframes, and other components to meet specified tolerances. Restoration Guidance: Essential information for body shop professionals and restorers to ensure factory-correct assembly and fit. Technical Depth Depth: High - focuses on precise measurements and permissible deviations critical for structural integrity and aesthetic perfection. 📊 Manual Specifications File Format Type: PDF Print Quality Printability: Printable, allowing users to select and print only necessary pages. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: V8 (M28 Series) Displacement: 4.5 Liters (4477 cc) for early models (1978-1980) Bore X Stroke: 94.0 mm x 80.0 mm (approximate) Compression Ratio: 8.5:1 (typical for early models) Performance Horsepower: Approx. 217-220 bhp (DIN) at 5500 rpm Torque: Approx. 275-280 lb-ft (373-380 Nm) at 3000 rpm Fuel System Induction: Bosch K-Jetronic Fuel Injection Fuel Type: Unleaded Premium Gasoline 🔧 Transmission Standard Type: 5-Speed Manual Transaxle Optional Type: 3-Speed Automatic Transaxle (e.g., ZF 3HP22) Features Transaxle Layout: Rear-mounted transaxle (engine in front, transmission and differential in rear) for near 50/50 weight distribution. 📐 Dimensions Exterior Length: 4530 mm (178.3 in) Width: 1775 mm (69.9 in) Height: 1280 mm (50.4 in) Wheelbase: 2430 mm (95.7 in) Front Track: 1500 mm (59.1 in) Rear Track: 1450 mm (57.1 in) Weights Curb Weight: Approx. 1550 kg (3417 lbs) for manual transmission Gross Vehicle Weight Rating: Not explicitly stated, but typically around 2000 kg. Weight Distribution: Near 50/50 front/rear (designed for optimal handling). 🛡️ Safety Features Ratings Crash Tests: Modern crash test data is not available for this era of vehicle. However, the 928 was designed with a robust chassis and safety cage. Active Features Brakes: Four-wheel disc brakes, often with ABS from 1979 onwards in some markets. Steering: Power-assisted rack and pinion steering. Passive Features Restraints: 3-point inertia reel seat belts, optional driver's airbag (introduced later). Construction: Reinforced steel unibody construction with integrated safety cage. 💡 Technology Features Infotainment Audio System: Period-appropriate AM/FM radio with cassette player, often with upgraded units installed over time. Climate Control: Power assisted climate control with manual or automatic temperature regulation. Driver Assistance ABS: Anti-lock Braking System (ABS) became available in later models of this period (from 1979). Cruise Control: Optional cruise control system. Connectivity Connectivity: None by modern standards; limited to basic vehicle systems. 🔧 Maintenance Service Intervals Oil Change: Typically every 7,500 to 10,000 miles (12,000 to 16,000 km) or 12 months, whichever comes first. Major Service: Comprehensive checks and component replacements (e.g., timing belt/chain, spark plugs, filters) around 30,000 to 60,000 miles. Fluid Specifications Engine Oil: SAE 10W-40 or 15W-50, API SG or higher (consult specific manual for exact recommendation). Coolant: Porsche recommends a specific coolant mixture (e.g., G40 or similar ethylene glycol based coolant with corrosion inhibitors). Transmission Fluid: Manual: SAE 75W-90 or 80W-90 gear oil. Automatic: DEXRON-III or equivalent ATF. Brake Fluid: DOT 4 Known Issues Fuel System: Aging fuel lines, injectors, and fuel pump issues common in older vehicles. K-Jetronic system can be sensitive to dirt. Cooling System: Rear-mounted radiator can be prone to clogging, and hoses may degrade over time. Air conditioning system component reliability. Electrical System: Wiring harness degradation, alternator issues, and aging relays are common. Suspension And Steering: Worn control arm bushings, ball joints, and tie rod ends are typical wear items. The automatic ride leveling system (optional) can be complex. Rust And Corrosion: While galvanized in key areas, rust can form in wheel wells, sills, and around...