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Porsche

Porsche 928 1978-1995 Service Repair Manual

Porsche 928 1978-1995 Service Repair Manual

$16.99
$16.99
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Vehicle data plateRef 359158
Brand
Porsche
Vehicle
Cars
Models covered
928
Years
1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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🏷️ Basic Information
Identification
Make:
Porsche
Model:
928
Model Years Covered:
1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
Vehicle Generation:
First Generation (1978-1986) and Second Generation (1987-1995)
Codes
Chassis Codes:
928, 928 S, 928 S2, 928 S3, 928 S4, 928 GT, 928 GTS
👋 Introduction
Market Position
Vehicle Class:
Grand Tourer (GT), Sports Car
Unique Selling Proposition:
Front-engine, rear-wheel-drive V8 grand tourer with transaxle, offering a blend of luxury, performance, and Porsche engineering.
Competitive Analysis
Key Competitors:
Ferrari 400/412, Aston Martin V8 Vantage, Jaguar XJ-S, Mercedes-Benz SEC models, BMW 8 Series (later).
Key Features
Design Philosophy:
Designed as a more practical and comfortable alternative to contemporary mid-engined sports cars, emphasizing long-distance touring.
Technical Innovation:
Transaxle design (engine front, gearbox rear) for optimal weight distribution, advanced (for its time) independent suspension, V8 engine.
Manual Utility
Benefit To Owner:
Enables cost-effective maintenance and repair, enhances understanding of vehicle systems, aids in preventative maintenance.
Target Audience:
Porsche 928 owners, independent mechanics, automotive enthusiasts interested in the 928.
📋 Manual Details
Coverage Areas
Manual Type:
Service and Repair Manual
Coverage Scope:
Comprehensive for all major mechanical, electrical, and body systems across the specified model years.
Information Provided:
Maintenance schedules, repair procedures, troubleshooting guides, diagnostic information, specifications, diagrams.
Page Count
Estimated Page Count:
Thousands of pages (typical for comprehensive Porsche service manuals covering multiple years and variants)
Language
Language:
English
Format
File Format:
PDF
Print Quality:
Fully Printable (high resolution for clarity)
Digital Features:
Zoom IN/OUT capability, searchable text (optimised for digital use)
Delivery
Delivery Method:
Instant Download
Requirements
Software Requirements:
Adobe PDF Reader, WinZip (or equivalent decompression software)
Operating System Compatibility:
All Versions of Windows & Mac
📖 Manual Coverage
Systems Covered
Engine Systems:
Engine mechanicals (cylinder head, block, pistons, crankshaft, camshafts), lubrication system, fuel system (injection, carburetion on early models), ignition system, exhaust system, cooling system, air intake system.
Transmission Systems:
Manual transmission (G28/G36), Automatic transmission (Tiptronic on later models), clutch, drive axles, differentials.
Chassis Systems:
Suspension (front and rear, including transaxle design), steering system (power steering), braking system (including ABS), wheels and tires.
Electrical Systems:
Battery, charging system (alternator), starting system, lighting system (headlights, taillights, interior), wiring harnesses, fuses and relays, control modules (ECU), instrumentation, climate control electricals, power windows, locks, seats.
Body And Interior:
Body structure, body panels, doors, hood, trunk, bumpers, glass, trim, seats, dashboard, carpeting, sound insulation, climate control system (HVAC).
Emission Control:
Emission control systems, catalytic converters, oxygen sensors, evaporative emission control (EVAP).
Procedures Included
Maintenance Procedures:
Oil changes, filter replacements, spark plug service, fluid checks and changes (coolant, brake fluid, transmission fluid, power steering fluid), belt inspection and replacement, air filter replacement.
Repair Procedures:
Engine overhaul, transmission repair, brake caliper/rotor replacement, suspension component replacement, electrical component troubleshooting and replacement, fuel injector service, cooling system repairs.
Troubleshooting:
Diagnostic trees, symptom-based troubleshooting, fault code interpretation (where applicable).
Technical Specifications:
Torque specifications, clearances, fluid capacities, electrical system diagrams, engine specifications (bore, stroke, compression ratio), performance data.
Technical Depth
Depth Of Coverage:
Detailed, from routine maintenance to major component overhauls and complex diagnostic procedures.
Diagrams And Illustrations:
Includes detailed wiring diagrams, exploded views, and step-by-step procedural illustrations.
📊 Manual Specifications
File Format
Digital Format:
PDF
Print Quality
Printability:
High-resolution for clear printing of all pages, including diagrams and schematics.
Binding Type
Binding Type Digital:
N/A (Digital Download)
Paper Type
Paper Type Digital:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Layout:
V8
Displacement Early Models:
4.5 Liters (4474 cc)
Displacement Later Models:
4.7L, 5.0L, 5.4L
Performance
Horsepower Early Models:
Approx. 240-250 hp (DIN)
Horsepower Later Models:
Up to 326 hp (928 GTS)
Torque Early Models:
Approx. 360 Nm (265 lb-ft)
Torque Later Models:
Up to 490 Nm (361 lb-ft) (928 GTS)
Fuel System
Fuel Delivery Early Models:
Bosch K-Jetronic mechanical fuel injection
Fuel Delivery Later Models:
Bosch L-Jetronic electronic fuel injection, DME (Digital Motor Electronics)
Fuel Type:
Premium Unleaded Gasoline
Engine Construction
Engine Block Material:
Aluminum Alloy
Cylinder Heads:
Aluminum Alloy, DOHC (Dual Overhead Camshafts)
🔧 Transmission
Standard
Standard Transmission Type:
5-speed manual transaxle (G28/G36)
Optional
Optional Transmission Type:
3-speed automatic (early models), 4-speed automatic (later models, including Tiptronic on some 928 S4/GT/GTS)
Features
Transaxle Design Benefit:
Excellent weight distribution (near 50/50) for improved handling and performance.
📐 Dimensions
Exterior
Body Style:
2-door Coupe
Length:
Varies by year and model, approx. 4520-4650 mm (178-183 in)
Width:
Varies by year and model, approx. 1780-1800 mm (70-71 in)
Height:
Varies by year and model, approx. 1280-1310 mm (50-52 in)
Weights
Curb Weight:
Varies by year and model, approx. 1500-1700 kg (3300-3750 lbs)
Wheelbase:
Approx. 2500 mm (98.4 in)
🛡️ Safety Features
Ratings
Crash Test Data:
Limited formal crash test data available for early models, but designed with significant structural integrity.
Active Features
Braking System:
Four-wheel disc brakes, often with ventilated front rotors. ABS (Anti-lock Braking System) introduced on later models (e.g., 928 S4).
Steering System:
Power-assisted rack and pinion, some models featured passive rear-wheel steering (HSC - High Compliance Steering).
Passive Features
Occupant Protection:
Three-point seatbelts, padded dashboard, energy-absorbing steering column, reinforced body structure.
Lighting:
Aerodynamic pop-up headlights for reduced drag, halogen or H4 headlights for improved illumination.
💡 Technology Features
Infotainment
Audio System:
Factory-installed cassette decks, AM/FM radios, optional CD players on later models. Sound system quality improved over the years.
Driver Assistance
ABS:
Available on later models (e.g., 928 S4 and beyond).
Cruise Control:
Standard on most models, electronic control.
Connectivity
Internal Systems:
Onboard diagnostics (OBD) implementation evolved over the years, becoming more sophisticated with later models.
Comfort Features
Climate Control:
Automatic climate control became standard on many later models, offering precise temperature management.
Seating:
Power-adjustable front seats, often with memory functions on higher trims. Sport seats available.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically 7,500-10,000 miles or annually, depending on driving conditions (refer to manual for specifics).
Timing Belt Interval:
Crucial component; typically recommended replacement every 30,000-60,000 miles or 4-5 years due to risk of catastrophic engine damage if it fails. Manual will specify exact interval and procedures.
Coolant Flush:
Recommended every 2-3 years or as per manual specification.
Fluid Specifications
Engine Oil:
High-quality synthetic oil, viscosity typically 5W-40 or 10W-40 (confirm with manual for specific model year and climate).
Transmission Fluid Manual:
GL-4 or GL-5 gear oil, specific viscosity depends on model and year.
Transmission Fluid Automatic:
Dexron III (or equivalent) for early automatics, later models may use different specs. Crucial to verify.
Brake Fluid:
DOT 4 or DOT 5.1 (refer to manual, as DOT 5 may be incompatible with some seals).
Power Steering Fluid:
Typically Pentosin CHF 11S or similar hydraulic fluid (verify with manual).
Known Issues
Common Wear Items:
Timing belt, water pump, fuel lines (especially older rubber components), cooling system hoses, fuel accumulators, door seals, suspension bushings, CV joints.
Electrical Gremlins:
Can be susceptible to aging electrical connectors, dashboard illumination issues, and issues with the comfort control unit.
Fuel System Issues:
Clogged fuel injectors (K-Jetronic), aging fuel pumps, and degradation of fuel lines.
📚 Vehicle History
Brand Heritage
Porsche Legacy:
Porsche is renowned for its engineering excellence, racing pedigree, and iconic sports car designs.
Model Evolution
Initial Concept:
Conceived as a successor to the 911, offering a more refined and comfortable GT experience.
Key Upgrades Through Years:
Engine displacement increases, introduction of 4-valve heads (928 S), aerodynamic enhancements (S4), increased power and torque, introduction of ABS and improved interior features.
Production
Production Start:
1978
Production End:
1995
Manufacturing Location:
Stuttgart, Germany
Total Production Numbers:
Approximately 61,000 units worldwide.
🏆 Awards & Recognition
Recognitions
Industry Acclaim:
While specific awards are less documented for this model than contemporary ones, the 928 was recognized for its engineering and design innovations.
Motor Trend Car Of The Year:
While not winning the US Motor Trend Car of the Year, it received significant praise and was often featured in automotive publications for its performance and innovation.
Ratings
Performance Reviews:
Consistently praised for its high-speed stability, powerful V8 engine, and comfortable ride.

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Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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