🏷️ Basic Information

Make:

Ferrari

Model:

328 GTB / GTS

Production Years Covered By Manual:

1985, 1986, 1987, 1988, 1989

Chassis Code:

328 GTB (Berlinetta), 328 GTS (Targa Top)

👋 Introduction

Era:

Iconic mid-engine V8 supercar of the 1980s

Target Audience:

Ferrari 328 owners, classic car enthusiasts, independent workshops specializing in European exotics

Competitors:

Porsche 911 (930/964), Lamborghini Jalpa, Lotus Esprit Turbo

Model Significance:

Successor to the 308, refined styling and improved performance, one of Ferrari's most popular V8 models

Manual Value Proposition:

Empowers owners to perform maintenance and repairs, saving significant costs associated with specialist workshops

📋 Manual Details

Primary Coverage:

Service, Repair, Maintenance, Troubleshooting, Diagnostics, Wiring Diagrams

Secondary Coverage:

Component Identification, Specifications, Torque Values, Procedures

Estimated Page Count:

Extensive (typically over 500 pages for comprehensive WSM)

Type:

Workshop Service Manual (WSM)

Language:

English

Delivery Method:

Digital Download

File Format:

PDF

Compatibility:

Windows & Mac

📖 Manual Coverage

Engine:

V8 engine overhaul, timing belt replacement, fuel injection system, ignition system, cooling system, lubrication system

Transmission:

Manual transmission (5-speed) removal, installation, overhaul, clutch service

Drivetrain:

Rear-wheel drive, differential, driveshafts, CV joints

Suspension:

Double wishbone suspension (front and rear), shock absorbers, springs, bushings, alignment specifications

Brakes:

Four-wheel disc brakes (ventilated), ABS system (if equipped), brake system bleeding, caliper overhaul, pad replacement

Steering:

Rack and pinion steering, power steering system, steering column

Electrical:

Complete wiring diagrams, starter system, alternator, battery, lighting systems, gauges, instrumentation, electronic control units (ECU)

Fuel System:

Fuel tank, fuel pump, fuel lines, fuel injectors, fuel pressure regulation

Cooling System:

Radiator, cooling fans, thermostat, coolant hoses, coolant type and capacity

Exhaust System:

Exhaust manifolds, catalytic converters (if applicable), mufflers, pipes

Body:

Body panel repair, door mechanisms, window operation, interior trim removal and installation

Climate Control:

Air conditioning system (R12 or R134a conversion), heater core, blower motor

Routine Maintenance:

Oil changes, filter replacements, spark plug replacement, coolant checks, belt inspections

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs) where applicable, symptom analysis

Repair Procedures:

Step-by-step instructions for component removal, installation, and overhaul

Adjustments:

Carburetor adjustments (for early models/specific markets), ignition timing adjustments, valve lash adjustments (where applicable)

Electrical Troubleshooting:

Using wiring diagrams to diagnose electrical faults, testing components

Engine Rebuild:

Includes detailed procedures for cylinder head removal, piston and connecting rod replacement, crankshaft servicing, and bearing checks.

Fuel Injection Diagnosis:

Covers testing fuel pressure regulator, injectors, cold start injector, and airflow sensor for K-Jetronic system.

Ignition System Service:

Details ignition coil testing, distributor servicing (if applicable), spark plug specifications, and ignition timing procedures.

Wheel Alignment:

Provides specific alignment angles (camber, caster, toe) for front and rear suspension.

Depth:

Comprehensive, suitable for professional technicians and experienced DIY enthusiasts

Detail Level:

Detailed component diagrams, torque specifications, clearance measurements, diagnostic flowcharts

Diagnostic Tools:

Mentions basic hand tools and electrical testers; advanced diagnostic equipment is not a focus for this era.

Completeness:

Comprehensive Workshop Service Manual (WSM), covering all major mechanical and electrical systems.

📊 Manual Specifications

Print Quality:

Full Printable Quality

Searchability:

Likely text-searchable PDF (depending on original scan quality)

Binding:

Digital (Printable PDF)

Paper Type:

Not Applicable (Digital)

⚙️ Engine Specifications

Engine Type:

Ferrari Tipo F105 V8

Displacement:

3.2 Liters (3186 cc)

Bore X Stroke:

81 mm x 78 mm

Compression Ratio:

9.2:1

Valve Train:

DOHC, 4 valves per cylinder (32 valves total)

Horsepower:

Approx. 260-270 hp (SAE net) at 6300 rpm

Torque:

Approx. 228-230 lb-ft (SAE net) at 4500 rpm

Fuel Delivery:

Bosch K-Jetronic (CIS) mechanical fuel injection (for most models)

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Coolant Type:

Ethylene glycol-based coolant (e.g., Shellbrook 'Ferrari Red')

Oil Type:

SAE 15W-50 or 20W-50 synthetic or high-quality conventional oil

Oil Capacity:

Approx. 10.5 liters (including filter)

🔧 Transmission

Type:

5-speed manual transaxle

Type:

None (manual only)

Transaxle Layout:

Mid-engine, rear-wheel drive with integrated transmission and differential

Gearbox Oil Type:

GL-4 or GL-5 manual transmission fluid, SAE 75W-90 or 80W-90

📐 Dimensions

Length:

Approx. 4340 mm (170.9 in)

Width:

Approx. 1750 mm (68.9 in)

Height:

Approx. 1130 mm (44.5 in)

Wheelbase:

Approx. 2450 mm (96.5 in)

Curb Weight:

Approx. 1400-1480 kg (3086-3263 lbs)

Front Wheel Size:

16 x 7J

Rear Wheel Size:

16 x 8J

Front Tire Size:

205/55 VR 16

Rear Tire Size:

225/50 VR 16

Bolt Pattern:

5 x 108 mm

🛡️ Safety Features

Crash Test Ratings:

Not applicable to modern standards; vehicles of this era were not subjected to standardized crash testing as we know it today.

ABS:

Optional on later models (Bosch ABS)

Seat Belts:

3-point inertia reel seat belts

Structural Integrity:

Designed with a rigid steel monocoque chassis with tubular subframes

💡 Technology Features

Audio System:

Typically a period-correct cassette/radio system, often aftermarket upgrades are common.

Cruise Control:

Optional

🔧 Maintenance

Oil Change Interval:

Every 5,000 km (3,000 miles) or annually

Timing Belt Replacement Interval:

Every 30,000 km (18,000 miles) or 3-5 years, whichever comes first (CRITICAL maintenance)

Major Service Interval:

Typically every 15,000-20,000 km (9,000-12,000 miles) or annually for comprehensive checks

Brake Fluid Type:

DOT 4 or DOT 5.1

Coolant Capacity:

Approximately 12 liters

Common Issues Identified In Manual:

Timing belt tensioner wear, fuel line degradation, aging electrical connectors, clutch slave cylinder leaks, carburetor synchronization (if applicable), exhaust manifold cracks

Filter Part Numbers:

Oil Filter: Mann-Filter W940/24, Bosch 0451103237 (verify with manual)

📚 Vehicle History

Heritage Link:

Direct lineage from Ferrari's successful mid-engine V8 sports cars (308 GT4, 308 GTB/GTS)

Predecessor:

Ferrari 308 GTB/GTS

Successor:

Ferrari F355

Key Improvements Over 308:

Larger displacement engine (3.2L vs 3.0L), updated fuel injection (Bosch K-Jetronic), improved braking system, revised suspension geometry, updated styling cues

Production Years:

1985-1989

Total Production Units:

Approximately 2,574 (GTB) + 3,072 (GTS) = 5,646 units

Manufacturing Location:

Maranello, Italy

🏆 Awards & Recognition

General Recognition:

Consistently rated as one of the most beautiful and usable V8 Ferraris of its era.