🏷️ Basic Information

Make:

Porsche

Model:

924

Model Variant:

924 Turbo

Production Years Covered:

1976-1989

Chassis Code:

931 (Turbo), 924

👋 Introduction

Positioning:

The Porsche 924 and 924 Turbo represented Porsche's entry into a more accessible market segment, offering a front-engine, rear-wheel-drive transaxle layout. This manual caters to enthusiasts and mechanics looking to maintain and repair these distinctive models.

Competitors Era:

Competed with sport coupes like the Datsun 280ZX, Toyota Celica Supra, and various European offerings from BMW and Alfa Romeo.

Manual Advantage:

Electronic format allows for digital zoom, enhancing clarity of diagrams and detailed procedures, which is crucial for precise mechanical work. The structure is designed for ease of use, correlating part numbers with page references.

📋 Manual Details

Primary Coverage:

Maintenance, Repair, Troubleshooting, Diagnostics, Specifications

Systems Covered:

General Information, Specifications, Technical Features, Rigging, Troubleshooting, Electrical System, Fuel System, Power Unit (Engine), Lower Unit (Drivetrain), Bracket Unit (Chassis/Suspension), Maintenance, Index, Appendix

Estimated Page Count:

Extensive (Specific count not provided, but described as 'a lot of information')

Manual Type:

Factory Service Repair Manual (Electronic)

Content Focus:

Comprehensive Service and Repair Manual, designed for technicians and DIY mechanics.

Language:

English

File Format:

PDF

Compatibility:

All Versions of Windows & Mac

Software Requirements:

Adobe PDF Reader

📖 Manual Coverage

Engine Systems:

Engine identification, disassembly, assembly, tuning, lubrication, cooling, ignition, emissions, fuel injection (CIS for Turbo), timing belt, cylinder head, pistons, crankshaft, camshaft

Transmission Drivetrain:

Manual and Automatic transmission repair, clutch, driveshafts, differential, transaxle overhaul

Electrical System:

Wiring diagrams, starter, alternator, battery, lighting, ignition switch, instruments, comfort systems, fuse box layouts, relay functions, diagnostic procedures for electrical faults

Chassis Suspension Steering:

Front and rear suspension, shock absorbers, springs, bushings, steering rack, power steering system, wheel alignment specifications

Braking System:

Disc brake systems (front and rear), hydraulic system, ABS (if applicable to later models), brake fluid specifications, caliper overhaul, rotor replacement

Fuel System:

Fuel tank, fuel pump, fuel lines, fuel filters, fuel injection system components (K-Jetronic), fuel pressure specifications, injector testing

Body Interior:

Body panel removal and installation, door mechanisms, interior trim, seat adjustment, HVAC system, body sealants and adhesives

Power Unit Details:

Detailed coverage of the engine assembly, including lubrication system, cooling system, intake and exhaust systems, and emissions control.

Lower Unit Details:

Focus on the drivetrain, including clutch actuation, transaxle operation, driveshaft U-joints, and differential service.

Bracket Unit Details:

Encompasses chassis components, including suspension arms, shock absorbers, steering linkage, and alignment specifications.

Maintenance Procedures:

Scheduled maintenance (oil changes, filter replacements, tune-ups), fluid level checks, belt tensioning, brake pad inspection, spark plug replacement

Repair Procedures:

Step-by-step instructions for component removal, overhaul, and installation of major mechanical and electrical systems

Troubleshooting Diagnostics:

Diagnostic flowcharts, common problem identification, symptom analysis, electrical testing procedures, fuel system testing

Technical Specifications:

Torque specifications, engine data, fluid capacities, electrical values, clearances, tolerances, alignment angles

Rigging Information:

Procedures for lifting, towing, and securing the vehicle, essential for safe handling during repairs or transport. Includes jack points and lifting capacities.

Troubleshooting Methodology:

Systematic approach to diagnosing issues, often presented in a 'symptom-cause-correction' format or detailed flowcharts for electrical problems.

Depth Of Coverage:

Comprehensive: Covers basic to advanced repairs, full engine and transmission rebuilds, detailed electrical diagnostics, and chassis overhauls.

📊 Manual Specifications

File Quality:

Digital PDF, allowing for zooming for detailed component views and schematics.

Searchability:

PDF format allows for text searching, significantly speeding up the process of finding specific information.

Print Ability:

Likely printable from PDF, allowing for physical reference.

Binding Type:

Not Applicable (Electronic PDF)

Paper Type:

Not Applicable (Electronic PDF)

⚙️ Engine Specifications

924 Engine:

2.0L (1984cc) Inline-4, naturally aspirated

924 Turbo Engine:

2.0L (1984cc) Inline-4, turbocharged (1980-1984), 2.5L (2479cc) Inline-4, turbocharged (1985-1989, 944-based engine in some later markets, though typically referred to as 924S Turbo or Carrera GT)

Engine Type 924:

Inline-4 cylinder, water-cooled, front-mounted

924 Horsepower:

Approx. 110-125 hp (depending on market and year)

924 Turbo Horsepower:

Approx. 143-177 hp (depending on variant and year)

924 Fuel System:

Carbureted (early models), Bosch CIS (Continuous Injection System) on later naturally aspirated and all Turbo models.

Turbocharged Engine Details:

Intercooled turbocharger, wastegate control, specific fuel mapping for boost conditions.

Engine Type 924 Turbo:

Inline-4 cylinder, water-cooled, turbocharged, front-mounted

🔧 Transmission

924 Transmission Std:

4-speed manual transaxle

924 Transmission Opt:

3-speed automatic transaxle

Transaxle Design:

Rear-mounted transaxle for optimal weight distribution (50/50).

📐 Dimensions

Wheelbase:

Approx. 97.1 inches (2467 mm)

Curb Weight 924:

Approx. 2700-2900 lbs (1225-1315 kg)

Curb Weight 924 Turbo:

Approx. 2850-3000 lbs (1293-1361 kg)

🛡️ Safety Features

Crash Safety Era:

Reflects safety standards of the late 1970s and 1980s, with improvements in later models. Manual would detail structural integrity and passive safety features.

Brakes:

Front disc brakes, rear drum brakes (later models or Turbo variants may feature rear discs).

Seatbelts:

3-point inertia reel seatbelts (front), lap belts (rear).

💡 Technology Features

Infotainment Era:

Basic for its time: AM/FM radio, cassette player. Manual would cover the electrical integration of these systems.

Assistance Features:

Limited by era. Power steering (optional or standard depending on model/year), four-wheel disc brakes on some variants.

Connectivity Features:

None by modern standards. Focus is on mechanical and electrical systems.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles or 6-12 months, subject to driving conditions. Manual will provide specific intervals and oil types.

Timing Belt Interval:

Crucial interval for interference engines, typically every 30,000-50,000 miles or 4-5 years. Manual will specify exact interval and components (belt, tensioner, idler pulleys).

Engine Oil:

API SF or SG, SAE 10W-40 or 20W-50 (manual will specify exact viscosity based on climate and engine condition). Example: Mobil 1 15W-50 for many air-cooled and water-cooled Porsches of this era.

Coolant:

Ethylene glycol based coolant with corrosion inhibitors. Manual will specify type and mixture ratio (e.g., 50/50 with distilled water).

Brake Fluid:

DOT 3 or DOT 4. Manual will specify exact type and recommended change interval.

Transmission Fluid:

Manual: GL-4 gear oil (e.g., 75W-90). Automatic: ATF Dexron III or equivalent. Manual will provide specific type and capacity.

Power Steering Fluid:

Pentosin CHF 11S or equivalent hydraulic fluid. Manual will detail type and procedure.

Common 924 Issues:

Cam belt tensioner failure, aging rubber components (hoses, bushings), rust in common areas (wheel wells, sills), electrical gremlins (especially wiring harnesses), clutch wear, fuel system component degradation.

Common 924 Turbo Issues:

In addition to standard 924 issues: turbocharger wear/failure, intercooler leaks, fuel distributor issues (CIS), head gasket problems due to higher stress, detonation in early models.

Fuel Injector Troubles:

Clogging or leaks in fuel injectors, particularly on CIS systems, requiring specialized testing and replacement. Manual details diagnostic methods.

📚 Vehicle History

Porsche Heritage:

Porsche AG, known for performance and engineering excellence, entered a new market segment with the 924, which was initially developed by Audi for Porsche.

924 Evolution:

The 924 evolved from a joint project, later becoming Porsche's entry-level model. Key developments included the introduction of the Turbo model (931), followed by the naturally aspirated 924S (often using a 944 engine variant) and further iterations.

924 Turbo Development:

The 924 Turbo (931) was a significant performance upgrade, incorporating turbocharging and improved braking systems to match the enhanced power output.

Manufacturing Location:

Neckarsulm, Germany (by Audi initially, then integrated into Porsche production).

🏆 Awards & Recognition

Automotive Press Reviews:

The 924 was often praised for its handling and chassis balance, though its performance, particularly in the naturally aspirated form, was sometimes criticized compared to more powerful competitors. The Turbo significantly improved performance.