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Porsche 928 Service Repair Workshop Manual
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🏷️ Basic Information Identification Make: Porsche Model: 928 Model Variant: 928, 928 S, 928 S4, 928 GT, 928 GTS Production Years Covered: 1978 through 1995 👋 Introduction Market Position Target...
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Typ: Cars
Dodavatel:
SKU: 28612
Štítky:
Cars
Porsche
Porsche 928
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🏷️ Basic Information
Identification
Make:
Porsche
Model:
928
Model Variant:
928, 928 S, 928 S4, 928 GT, 928 GTS
Production Years Covered:
1978 through 1995
👋 Introduction
Market Position
Target Audience:
Grand touring buyers seeking a front-engine V8 luxury sports coupe
Segment:
Premium grand tourer
Key Advantage:
Combined Porsche sports car dynamics with V8 refinement and long-distance comfort
Key Features
Engine:
Water-cooled aluminum-alloy V8 mounted at the front
Transmission Layout:
Rear-mounted transaxle for near 50/50 weight distribution
Body:
Two-door coupe with pop-up headlamps and rear hatch
Suspension:
Independent suspension with aluminum control arms and coil springs
Weissach Axle:
Rear axle design providing stable passive rear-wheel steering behavior
📋 Manual Details
Manual Information
Coverage Areas:
All Porsche 928 model years and variants, 1978-1995
Manual Type:
Complete service, repair and workshop manual
Language:
English
Format:
PDF file
Delivery Method:
Instant download after payment completion
Printing:
All pages printable for use in the workshop
📖 Manual Coverage
Systems Covered
Engine:
Complete mechanical work including removal, disassembly, rebuild and timing belt service
Fuel System:
Bosch K-Jetronic, LH-Jetronic injection and fuel delivery components
Ignition System:
Distributor, coils, control units and timing procedures
Cooling System:
Radiator, fans, thermostat, water pump and coolant specifications
Lubrication:
Oil pump, filter housing and oil circuit diagrams
Transmission:
Manual and automatic transmission service, overhaul and clutch replacement
Drive Axles:
Transaxle, CV joints, driveshaft and differential
Suspension and Steering:
Front and rear suspension, power steering system and wheel alignment
Brakes:
Disc brakes, ABS, master cylinder and parking brake
Electrical System:
Wiring schematics, fuse/relay locations, instruments and lighting
Heating and Air Conditioning:
Blower system, climate control and refrigerant service
Body and Interior:
Body panels, hatch, doors, seats, trim and sunroof
Wheels and Tires:
Specifications and balancing procedures
Exhaust System:
Headers, mufflers and emissions equipment
Procedures and Depth
Diagnostics:
Fault finding charts and troubleshooting procedures for all systems
Repair Procedures:
Step-by-step instructions with torque specifications
Illustrations:
Detailed exploded views, diagrams and wiring schematics
Technical Depth:
Factory-level detail suitable for full rebuilds and restoration
Parts Information:
Part numbering, torque specs and fitting data included
Special Tools:
Required special tools identified for each procedure
Maintenance:
Complete scheduled service and tune-up procedures
📊 Manual Specifications
File & Compatibility
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print & Binding
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
⚙️ Engine Specifications
Engine Options
Engine Family:
Porsche M28 water-cooled V8
Displacement Range:
4.5 L to 5.4 L across the model run
Early Engine:
4.5 L V8 (1978-1982)
S4/GT/GTS Engine:
5.0 L and 5.4 L 32-valve V8 (1987-1995)
Performance
Early Output:
Approximately 240 hp (4.5 L, 1978)
S4 Output:
Approximately 316-320 hp (5.0 L 32-valve, 1987-1991)
GTS Output:
Approximately 345 hp (5.4 L, 1992-1995)
Fuel System
Early Injection:
Bosch K-Jetronic continuous mechanical fuel injection
Later Injection:
Bosch LH-Jetronic electronic fuel injection (from 1985/1987)
Fuel Delivery:
In-tank pump with external main fuel pump
🔧 Transmission
Transmissions
Standard Transmission:
5-speed manual transaxle (5-speed with dog-leg first on early models)
Optional Transmission:
3-speed automatic (1978-1983), later 4-speed automatic (Mercedes-derived)
Features
Transaxle Layout:
Gearbox mounted at the rear with torque tube driveshaft for balanced weight distribution
Final Drive:
Integrated into transaxle housing
Clutch:
Hydraulically actuated single-plate clutch on manual models
📐 Dimensions
Exterior
Wheelbase:
98.4 in (2,500 mm)
Length:
Approximately 177-180 in (4,495-4,575 mm) depending on variant
Width:
Approximately 73-75 in (1,850-1,910 mm)
Height:
Approximately 51 in (1,290 mm)
Weights
Curb Weight:
Approximately 3,400-3,700 lb (1,540-1,680 kg) depending on model year
Exact Figure:
N/A - varies by year and equipment; see manual specification tables
🛡️ Safety Features
Crash Test Information
Official Ratings:
N/A - not rated by modern protocols for this model
Passive Features
Seat Belts:
Three-point inertia reel seat belts front and rear
Body Structure:
Unitary steel body with front and rear crumple zones
Head Restraints:
Integrated front head restraints
Active Features
Brakes:
Power-assisted four-wheel disc brakes with large ventilated rotors
ABS:
Anti-lock braking system available from 1986 onward, standard on later models
Steering:
Rack and pinion power steering
💡 Technology Features
Infotainment
Audio System:
Factory AM/FM cassette head unit with optional amplifier and speakers
Upgrades:
Premium sound options varied by year and market
Driver Assistance
Instrumentation:
Full analog gauges including voltmeter, oil pressure and coolant temperature
Onboard Computer:
Trip computer available on S4 and later models
Climate Control:
Automatic climate control available on later models
Modern Systems:
N/A - no modern driver assistance features on this era
🔧 Maintenance
Service Intervals
Oil and Filter:
Every 7,500-15,000 km depending on year and service schedule
Timing Belt:
Replace at regular intervals per factory schedule; critical on 32-valve engines
Spark Plugs:
Per scheduled service intervals in the manual
Fluid Specifications
Engine Oil:
Factory-specified multi-grade oil; see manual tables by climate
Coolant:
Phosphate-free coolant with corrosion inhibitor
Transmission Oil:
Manual: gear oil per factory spec; Automatic: Dexron-type ATF
Brake Fluid:
DOT 3 or DOT 4 as specified per year
Power Steering Fluid:
Factory-specified hydraulic fluid
Known Issues and Wear Items
Timing Belt Failure:
Interference engine; belt and roller replacement is critical maintenance
Dash Cracking:
Dashboard material deterioration common on higher-mileage cars
Fuel Injection:
K-Jetronic mixture adjustments and aging fuel lines
Electrical:
Aging wiring, fuse boxes and ground points on older cars
Suspension:
Front control arm bushings and ball joints as wear items
📚 Vehicle History
Brand Heritage
Manufacturer:
Porsche AG, Stuttgart-Zuffenhausen, Germany
Model Launch:
Introduced in 1977 for the 1978 model year
Role:
Flagship grand tourer, named European Car of the Year 1978
Model Evolution
1978-1986:
928 and 928 S with 4.5 L and 4.7 L V8 engines
1987-1991:
928 S4 with 5.0 L 32-valve engine
1989-1991:
928 GT with shorter gearing and sport equipment
1992-1995:
928 GTS with 5.4 L engine, wider body and updated interior
Production Location
Production:
Stuttgart-Zuffenhausen, West Germany / Germany
🏆 Awards & Recognition
Recognitions
European Car of the Year 1978:
First sports car to win the award
Best Car of the Year 1978:
Named Best Car by multiple international motoring publications in its launch year
Lasting Reputation:
Regarded as the fastest production car sold in America at its 1978 introduction