🏷️ Basic Information Identification Make: Porsche Model: 928 Year: 1979 Codes Internal Project Code: 928 Chassis Code: 928 👋 Introduction Market Position Original Intent: The Porsche 928 was conceived as a flagship GT car, intended to replace the 911 as Porsche's primary sports car, offering a more luxurious and comfortable Grand Tourer experience with a front-engine, rear-drive layout and a V8 engine. Competitive Analysis Competitors: Competed against luxury GT cars such as the Jaguar XJ-S, Aston Martin Vantage, Ferrari 400 series, and Chevrolet Corvette. Key Features Design Philosophy: Front-engine, rear-wheel drive transaxle layout for optimized weight distribution, advanced aerodynamics, and a luxurious, driver-focused interior. V8 Engine: Introduction of Porsche's first production V8 engine, a 4.5-liter unit. Innovation: Incorporated advanced features for its time, including a rear transaxle for improved handling, pop-up headlights, and a sophisticated interior. 📋 Manual Details Coverage Areas Primary Coverage: Maintenance and Repair Procedures Specific Systems Highlighted: General Information, Specifications, Technical Features, Rigging, Troubleshooting, Electrical System, Fuel System, Power Unit, Lower Unit, Bracket Unit, Maintenance, Index, Appendix Page Count Estimated Page Count: Extensive (specific number not provided, but described as containing 'a lot of information') Manual Type Type: Service Repair Manual / Factory Manual Language Language: English Format Format: Electronic (PDF) 📖 Manual Coverage Systems Covered Engine: Complete coverage of the Porsche 928's V8 power unit, including diagnostics, repair, and overhaul. Fuel System: Detailed information on the fuel injection system (Bosch K-Jetronic), fuel pump, injectors, lines, and related components. Electrical System: Comprehensive electrical schematics, wiring diagrams, component testing, and troubleshooting for all onboard electrical systems. Transmission: Repair and maintenance procedures for the transaxle (both automatic and manual if applicable for '79), including clutch, gears, and lubrication. Braking System: Information on hydraulic brake system, including calipers, master cylinder, lines, and disc brake components. Suspension And Steering: Detailed procedures for front and rear suspension (transaxle design), steering rack, power steering system, and wheel alignment. Cooling System: Maintenance and repair of the engine cooling system, including radiator, coolant, hoses, and thermostat. Exhaust System: Information on exhaust manifolds, catalytic converters (if applicable for early models), mufflers, and pipework. Body And Chassis: Structural information, body panel repair, trim, glass replacement, and interior component removal/installation. Procedures Included Maintenance: Routine maintenance tasks, fluid changes, filter replacements, and tune-up procedures. Troubleshooting: Step-by-step diagnostic guides for common and complex problems, symptom-based troubleshooting. Repair And Overhaul: Detailed instructions for disassembly, repair, reassembly, and adjustment of major mechanical and electrical components. Wiring Diagrams: Provision of comprehensive electrical schematics for tracing circuits and diagnosing faults. Specifications: Torque values, clearances, fluid capacities, and other critical technical data for accurate repairs. Technical Depth Depth Of Information: Factory-level detail suitable for professional technicians and advanced DIY enthusiasts, covering everything from basic maintenance to complete engine and transmission rebuilds. 📊 Manual Specifications File Format Format: PDF Compatibility: All Versions of Windows & Mac Software Requirement: Adobe PDF Reader Print Quality Zoom Capability: High-quality zoom feature allows clear viewing of all details on computer screen. Binding Type Binding: N/A (Electronic Format) Paper Type Paper Quality: N/A (Electronic Format) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated V8 Displacement: 4.5 Liters (4474 cc) Bore X Stroke: 86.0 mm x 96.0 mm Compression Ratio: 8.5:1 (Euro Spec), 9.0:1 (US Spec) Performance Horsepower: 217 hp (162 kW) at 5500 rpm (Euro Spec), 220 hp (164 kW) at 5500 rpm (US Spec) Torque: 264 lb-ft (358 Nm) at 3600 rpm (Euro Spec), 268 lb-ft (363 Nm) at 3600 rpm (US Spec) Fuel System Injection System: Bosch K-Jetronic CIS (Continuous Injection System) Fuel Type: Unleaded Premium Gasoline Lubrication Oil Capacity: Approx. 8.5 Liters (with filter) Engine Management Ignition System: Electronic Ignition 🔧 Transmission Standard Transmission Type: 5-speed Manual Transaxle (standard in some markets) Optional Transmission Type: 3-speed Automatic Transaxle (also common, especially in US market) Features Layout: Rear Transaxle (engine front, transmission rear) Fluid Specifications Automatic Transmission Fluid: Dexron III or equivalent (consult manual for exact specification) Manual Transmission Fluid: SAE 75W-90 or SAE 80W-90 Gear Oil (consult manual for exact specification) 📐 Dimensions Exterior Length: 4680 mm (184.3 in) Width: 1785 mm (70.3 in) Height: 1280 mm (50.4 in) Wheelbase: 2700 mm (106.3 in) Front Track: 1500 mm (59.1 in) Rear Track: 1514 mm (59.6 in) Weights Curb Weight: 1650 kg (3638 lbs) - Automatic Transmission Gross Vehicle Weight Rating: Approx. 2000 kg (4409 lbs) Wheels And Tires Standard Wheel Size: 15 x 7J (Front), 15 x 8J (Rear) Standard Tire Size: 215/60 VR 15 (Front), 225/50 VR 15 (Rear) Bolt Pattern: 5 x 130 mm 🛡️ Safety Features Ratings Crash Test Information: No official standardized crash test ratings available for this era of vehicle from agencies like NHTSA or Euro NCAP. Active Features ABS: Optional (initially available on select models, became more standard later in production life). Passive Features Seatbelts: Three-point front seatbelts with inertia reel....
The Porsche 928 was conceived as a flagship GT car, intended to replace the 911 as Porsche's primary sports car, offering a more luxurious and comfortable Grand Tourer experience with a front-engine, rear-drive layout and a V8 engine.
Competitive Analysis
Competitors:
Competed against luxury GT cars such as the Jaguar XJ-S, Aston Martin Vantage, Ferrari 400 series, and Chevrolet Corvette.
Key Features
Design Philosophy:
Front-engine, rear-wheel drive transaxle layout for optimized weight distribution, advanced aerodynamics, and a luxurious, driver-focused interior.
V8 Engine:
Introduction of Porsche's first production V8 engine, a 4.5-liter unit.
Innovation:
Incorporated advanced features for its time, including a rear transaxle for improved handling, pop-up headlights, and a sophisticated interior.
📋 Manual Details
Coverage Areas
Primary Coverage:
Maintenance and Repair Procedures
Specific Systems Highlighted:
General Information, Specifications, Technical Features, Rigging, Troubleshooting, Electrical System, Fuel System, Power Unit, Lower Unit, Bracket Unit, Maintenance, Index, Appendix
Page Count
Estimated Page Count:
Extensive (specific number not provided, but described as containing 'a lot of information')
Manual Type
Type:
Service Repair Manual / Factory Manual
Language
Language:
English
Format
Format:
Electronic (PDF)
📖 Manual Coverage
Systems Covered
Engine:
Complete coverage of the Porsche 928's V8 power unit, including diagnostics, repair, and overhaul.
Fuel System:
Detailed information on the fuel injection system (Bosch K-Jetronic), fuel pump, injectors, lines, and related components.
Electrical System:
Comprehensive electrical schematics, wiring diagrams, component testing, and troubleshooting for all onboard electrical systems.
Transmission:
Repair and maintenance procedures for the transaxle (both automatic and manual if applicable for '79), including clutch, gears, and lubrication.
Braking System:
Information on hydraulic brake system, including calipers, master cylinder, lines, and disc brake components.
Suspension And Steering:
Detailed procedures for front and rear suspension (transaxle design), steering rack, power steering system, and wheel alignment.
Cooling System:
Maintenance and repair of the engine cooling system, including radiator, coolant, hoses, and thermostat.
Exhaust System:
Information on exhaust manifolds, catalytic converters (if applicable for early models), mufflers, and pipework.
Body And Chassis:
Structural information, body panel repair, trim, glass replacement, and interior component removal/installation.
Procedures Included
Maintenance:
Routine maintenance tasks, fluid changes, filter replacements, and tune-up procedures.
Troubleshooting:
Step-by-step diagnostic guides for common and complex problems, symptom-based troubleshooting.
Repair And Overhaul:
Detailed instructions for disassembly, repair, reassembly, and adjustment of major mechanical and electrical components.
Wiring Diagrams:
Provision of comprehensive electrical schematics for tracing circuits and diagnosing faults.
Specifications:
Torque values, clearances, fluid capacities, and other critical technical data for accurate repairs.
Technical Depth
Depth Of Information:
Factory-level detail suitable for professional technicians and advanced DIY enthusiasts, covering everything from basic maintenance to complete engine and transmission rebuilds.
📊 Manual Specifications
File Format
Format:
PDF
Compatibility:
All Versions of Windows & Mac
Software Requirement:
Adobe PDF Reader
Print Quality
Zoom Capability:
High-quality zoom feature allows clear viewing of all details on computer screen.
Binding Type
Binding:
N/A (Electronic Format)
Paper Type
Paper Quality:
N/A (Electronic Format)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Naturally Aspirated V8
Displacement:
4.5 Liters (4474 cc)
Bore X Stroke:
86.0 mm x 96.0 mm
Compression Ratio:
8.5:1 (Euro Spec), 9.0:1 (US Spec)
Performance
Horsepower:
217 hp (162 kW) at 5500 rpm (Euro Spec), 220 hp (164 kW) at 5500 rpm (US Spec)
Torque:
264 lb-ft (358 Nm) at 3600 rpm (Euro Spec), 268 lb-ft (363 Nm) at 3600 rpm (US Spec)
5-speed Manual Transaxle (standard in some markets)
Optional
Transmission Type:
3-speed Automatic Transaxle (also common, especially in US market)
Features
Layout:
Rear Transaxle (engine front, transmission rear)
Fluid Specifications
Automatic Transmission Fluid:
Dexron III or equivalent (consult manual for exact specification)
Manual Transmission Fluid:
SAE 75W-90 or SAE 80W-90 Gear Oil (consult manual for exact specification)
📐 Dimensions
Exterior
Length:
4680 mm (184.3 in)
Width:
1785 mm (70.3 in)
Height:
1280 mm (50.4 in)
Wheelbase:
2700 mm (106.3 in)
Front Track:
1500 mm (59.1 in)
Rear Track:
1514 mm (59.6 in)
Weights
Curb Weight:
1650 kg (3638 lbs) - Automatic Transmission
Gross Vehicle Weight Rating:
Approx. 2000 kg (4409 lbs)
Wheels And Tires
Standard Wheel Size:
15 x 7J (Front), 15 x 8J (Rear)
Standard Tire Size:
215/60 VR 15 (Front), 225/50 VR 15 (Rear)
Bolt Pattern:
5 x 130 mm
🛡️ Safety Features
Ratings
Crash Test Information:
No official standardized crash test ratings available for this era of vehicle from agencies like NHTSA or Euro NCAP.
Active Features
ABS:
Optional (initially available on select models, became more standard later in production life).
Passive Features
Seatbelts:
Three-point front seatbelts with inertia reel.
Headrests:
Integrated front headrests.
Energy ABSorbing Steering Column:
Standard feature.
💡 Technology Features
Infotainment
Original Audio System:
Porsche branded radio and cassette player (often Blaupunkt or Becker) with amplifier systems.
Climate Control:
Manual or optional automatic climate control system.
Driver Assistance
Cruise Control:
Optional feature.
Connectivity
Original Connectivity:
N/A (no modern connectivity features like Bluetooth or USB).
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 10,000 km or 12 months (whichever comes first) – consult manual for specific engine oil recommendations.
Major Service Interval:
Refer to manual for detailed schedule, typically involving timing belt checks/replacement (if applicable to '79 V8), spark plugs, filters, and system inspections.
Fluid Specifications
Engine Oil Grade:
SAE 15W-50 or SAE 20W-50 (API SF or SG classification recommended, check manual for precise details based on climate).
Coolant Type:
Porsche recommended ethylene glycol-based coolant with corrosion inhibitors (typically a 50/50 mix with distilled water).
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Known Issues
Fuel System Components:
Degradation of K-Jetronic fuel distributor seals, vacuum leaks, and aging fuel lines.
Cooling System:
Leaking coolant pipes (especially at connections), aging hoses, and potential radiator issues.
Electrical Gremlins:
Common in older Porsches, especially issues with wiring harnesses, grounds, and aging relays or switches.
Transaxle Clutch:
Wear on clutch components in manual models; potential leaks or wear in automatic transmission.
Timing Belt:
Critical component for V8 models; timely replacement is essential to prevent catastrophic engine damage. Consult manual for specific interval. (Note: Early 928s used timing chains. Verify for the '79 model year, but chains are generally more robust than belts and typically don't have a strict replacement interval unless issues arise).
📚 Vehicle History
Brand Heritage
Porsche Legacy:
Porsche, renowned for its rear-engined 911, sought to expand its market with the 928, showcasing innovation and a departure from its traditional formula.
Model Evolution
Introduction Year:
1977 ( Geneva Motor Show)
First Production Year:
1978
1979 Updates:
Minor refinements over the initial 1978 model, often focused on emissions, comfort, and minor feature adjustments. Engine output and chassis generally remained consistent.
Production
Production Period:
1978–1995
Manufacturing Location:
Stuttgart, Germany
🏆 Awards & Recognition
Recognitions
Automotive Journalism Accolades:
Voted 'Import Car of the Year' by Motor Trend magazine in 1978.
Engineering Recognition:
Praised for its engineering, handling, and comfortable Grand Touring capabilities, setting a benchmark for front-engined V8 sports cars of its era.
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