🏷️ Basic Information

Make:

Porsche

Model:

924 Carrera GT

Year:

1981

Chassis Code:

931

👋 Introduction

Market Position:

The Porsche 924 Carrera GT was a limited-production homologation special designed for racing, positioned at the higher end of the sports coupe market, offering a blend of performance and Porsche exclusivity.

Competitive Analysis:

Competed with other performance-oriented coupes and sports cars of the era, such as the Toyota Celica Supra, Datsun 280ZX Turbo, and some European models, but with Porsche's distinct engineering and brand cachet.

Key Features:

Aggressive aerodynamic body kit, wider fenders, upgraded suspension and brakes, more powerful engine derived from motorsport, limited production run for homologation.

📋 Manual Details

Coverage Areas:

Full vehicle repair and service

Page Count:

1316

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed disassembly, assembly, inspection, and repair of engine components including cylinder head, block, pistons, crankshaft, camshaft, timing, lubrication, and cooling systems.

Fuel System:

Diagnosis, testing, and repair of fuel injection system (K-Jetronic), fuel pump, fuel filter, fuel lines, and fuel tank.

Ignition System:

Troubleshooting and repair of ignition coil, distributor, spark plugs, and associated wiring.

Exhaust System:

Inspection and replacement of exhaust manifold, catalytic converter, muffler, and piping.

Transmission Manual:

Detailed procedures for removal, installation, disassembly, assembly, and adjustment of the manual gearbox, clutch, and driveshafts.

Transmission Automatic:

Not Applicable for Carrera GT variant.

Suspension Front:

Removal, installation, inspection, and repair of front suspension components including struts, control arms, bushings, and anti-roll bar.

Suspension Rear:

Removal, installation, inspection, and repair of rear suspension components including trailing arms, shock absorbers, springs, and bushings.

Steering System:

Diagnosis, repair, and adjustment of steering rack, tie rods, and steering column.

Brake System:

Detailed procedures for front and rear disc brake systems, including caliper overhaul, pad replacement, rotor inspection, brake fluid service, and parking brake adjustment.

Electrical System Charging:

Troubleshooting and repair of alternator, voltage regulator, and battery.

Electrical System Starting:

Diagnosis and repair of starter motor and associated circuitry.

Lighting System:

Troubleshooting and repair of headlights, taillights, interior lighting, and turn signals.

Instrumentation:

Diagnosis and repair of gauges, warning lights, and instrument cluster.

Body Interior:

Procedures for removal and installation of interior trim, seats, door panels, and headliner.

Body Exterior:

Body panel alignment, bumper repair, glass replacement, and door mechanism adjustments.

Body Paint And Rust:

General guidance on paint and rust repair techniques, though not a dedicated body shop manual.

HVAC System:

Repair and maintenance of heating and ventilation systems, potentially including air conditioning components.

Body Control Modules:

Limited coverage, primarily mechanical and basic electrical systems.

Safety Systems:

Focus on mechanical safety components such as brakes and steering; does not extensively cover modern electronic safety features.

Maintenance:

Detailed periodic maintenance schedules, fluid changes, filter replacements, tune-ups, and inspection procedures.

Troubleshooting:

Systematic diagnostic procedures for identifying and resolving common and complex faults across all vehicle systems.

Repair:

Comprehensive step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.

Adjustment:

Precise instructions for adjusting various vehicle components including engine timing, fuel mixture, clutch, brakes, and suspension.

Installation:

Guidance on installing new or reconditioned parts and components.

Removal:

Detailed instructions for safely removing all major and minor vehicle components.

Disassembly:

Step-by-step breakdown of components for inspection and repair.

Assembly:

Instructions for putting components back together correctly.

Lubrication Service:

Comprehensive lubrication points and procedures for engine, transmission, chassis, and suspension.

Wheel Alignment:

Specifications and procedures for wheel alignment, camber, caster, and toe adjustments.

Torque Specifications:

Detailed torque values for all critical fasteners and bolts across the vehicle.

Technical Depth:

Extremely high. Covers everything from basic maintenance to full engine and transmission rebuilds, including detailed torque specifications, tolerances, and diagnostic procedures.

Special Tools:

References specific Porsche special tools required for certain operations, often illustrated in use.

📊 Manual Specifications

File Format:

PDF

Print Quality:

Printable, high-resolution PDF.

Binding Type:

Digital Download (PDF)

Paper Type:

N/A (Digital)

Compatibility:

Windows, Mac, Linux OS; requires Adobe Reader.

Searchability:

Likely searchable PDF, enhancing ease of finding specific information.

Diagram Quality:

High quality pictorial diagrams, exploded views, and photographs for detailed visual guidance.

⚙️ Engine Specifications

Engine Type:

Inline-4, front-mounted, longitudinal

Displacement:

2.0 Liters (1984 cc)

Engine Code:

As part of the 924 Carrera GT program, engine specifications would have been derived from standard 924 engines but significantly modified for performance.

Horsepower:

Approximately 170-180 hp (estimated for homologation version)

Torque:

Approximately 180-190 lb-ft (estimated for homologation version)

Fuel System:

Bosch K-Jetronic Continuous Injection System (CIS)

Block Material:

Cast Iron

Cylinder Head Material:

Aluminum Alloy

Cooling Type:

Liquid-cooled

Timing Mechanism:

Timing Belt

🔧 Transmission

Transmission Type:

5-speed Manual Transaxle

Optional Transmission:

Not available for Carrera GT.

Transaxle Layout:

Rear-wheel drive with transaxle (engine front, gearbox rear).

📐 Dimensions

Body Style:

2-door Coupe

Wheelbase:

Approx. 2,400 mm (94.5 inches)

Length:

Approx. 4,215 mm (165.9 inches)

Width:

Approx. 1,735 mm (68.3 inches) (wider fenders)

Height:

Approx. 1,280 mm (50.4 inches)

Curb Weight:

Approx. 1,210 kg (2,668 lbs)

🛡️ Safety Features

Safety Ratings:

No modern crash test ratings available; safety features focused on structural integrity and active safety systems of the era.

Active Features:

Performance-oriented suspension, powerful brakes (ventilated front discs), responsive steering.

Passive Features:

Reinforced chassis, roll bar integrated into the windscreen frame, three-point seatbelts.

💡 Technology Features

Infotainment System:

Basic analogue radio and cassette player, if fitted. No advanced infotainment features.

Driver Assistance:

None (typical for the era).

Connectivity Features:

None.

Engine Management:

Mechanical fuel injection (K-Jetronic) with basic electronic ignition control.

🔧 Maintenance

Oil Change Interval:

Typically 5,000-7,500 miles or annually, depending on driving conditions. Manual will provide precise interval.

Timing Belt Replacement:

Critical component. Interval typically 30,000-60,000 miles or 5 years. Manual will specify exact interval and procedure.

Engine Oil Type:

High-quality multi-viscosity oil, e.g., 20W-50 or 10W-40 (check manual for specific Porsche A40 or similar specification).

Coolant Type:

Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio). Manual will specify Porsche approved coolant.

Brake Fluid Type:

DOT 4 brake fluid (ensure it's a quality, fresh fluid).

Transmission Fluid Type:

Manual Transmission Fluid (MTF) - Manual will specify exact viscosity and type (e.g., GL-4).

Gearbox Oil Capacity:

Manual will list precise capacity for the transaxle.

Known Issues:

Rust on sills and wheel arches, aging rubber seals and bushings, potential fuel distributor issues with K-Jetronic, timing belt wear, clutch wear, and cooling system leaks. Manual addresses these through diagnostic and repair procedures.

📚 Vehicle History

Brand Heritage:

Porsche, a renowned German manufacturer, has a long history of producing high-performance sports cars and race cars, synonymous with engineering excellence and racing success.

Model Evolution:

The 924 was Porsche's entry-level model, originally developed by Audi. The Carrera GT was a special, homologation version for Group 4 racing, featuring significant upgrades over the standard 924.

Production Years:

1981 (limited production for homologation)

Production Location:

Neckarsulm, Germany (factory shared with Audi)

🏆 Awards & Recognition

Recognitions:

The 924 platform was the basis for Porsche's entry into more affordable sports car market, and the Carrera GT version gained recognition as a capable homologation special for racing.