🏷️ Basic Information

Make:

Porsche

Model:

911

Model Years Covered:

1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981

Chassis Code:

G-Series (1974-1989, with specific sub-series for 1972-1973)

👋 Introduction

Value Proposition:

Offers a consolidated, digital solution for accessing multiple factory repair manuals, providing convenience and cost savings over antique paper manuals.

Convenience:

Consolidates all necessary shop manuals into a single, easily accessible digital format.

Durability:

Digital format ensures indefinite lifespan and protection from physical wear and tear.

Accessibility:

Instant download and access from personal computer.

📋 Manual Details

General Coverage:

Comprehensive coverage for all Porsche 911 models from 1972 to 1981.

Estimated Pages:

N/A (Digital format, content is extensive and searchable)

Type:

Factory Service/Repair Manual (Consolidated)

Language:

English

Digital Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Engine mechanical: cylinder head, cylinder block, camshaft, crankshaft, connecting rods, pistons, lubrication system (oil pump, oil filter).

Engine Control:

Engine control systems: fuel injection (Bosch K-Jetronic for later models), ignition system, emission control systems (including charcoal canister).

Cooling System:

Cooling system: radiator, cooling fan system, thermostat, engine coolant.

Fuel System:

Fuel system: fuel tank, fuel pump, fuel injectors, fuel lines.

Exhaust System:

Exhaust system: exhaust pipes, muffler components.

Transmission Manual:

Manual transaxle system: clutch system (master cylinder, release cylinder, clutch unit), gears, shafts, maintenance, oil specifications.

Transmission Automatic:

Automatic transaxle system: automatic transaxle assembly, fluid specifications, maintenance.

Drivetrain:

Drivetrain: front drive shaft, rear axle hub, rear axle beam, differential case assembly.

Suspension Front:

Front suspension system: front suspension, front suspension arm, front stabilizer bar, front shock absorber.

Suspension Rear:

Rear suspension system: rear suspension, rear coil spring, rear shock absorber Assy, rear axle hub, rear axle beam.

Steering System:

Steering system: steering system, steering column, steering sensor, power steering, power steering link Assy.

Brake System:

Brake system: brake system, brake master cylinder, brake booster, brake fluid, brake pedal, brake actuator, front brake, rear brake.

Wheels Tires:

Wheel and tire system: wheel and tire system, front wheel alignment, rear wheel alignment.

Electrical Lighting:

Lighting system: headlamp Assy, license plate lamp Assy, front marker lamp Assy, rear combination lamp Assy, center stop lamp Assy.

Electrical Instruments:

Instrument panel, combination meter.

Electrical Starting Charging:

Starting system: starter Assy, starter switch, charging system, generator Assy.

Electrical Ignition:

Ignition system: distributor, ignition coils, spark plugs.

Electrical Audio Visual:

Audio & Visual System: radio receiver Assy, amplifier antenna Assy, antenna cord sub-assy.

Body Exterior:

Body repair: front bumper, rear bumper, hood, fender panel mudguard, roof drip side finish moulding, side mudguard, back door, back door glass.

Body Interior:

Interior: instrument panel, seat, seat belt, roof headlining, sun roof system, cigarette lighter Assy, horn button Assy.

Climate Control:

Heater & Air Conditioner: heater radiator Assy, heater or boost ventilator control, air conditioning system, air conditioning blower Assy, air conditioner refrigerant.

Wiper Washer:

Wiper and Washer System: windshield wiper motor Assy, wiper rubber, rear wiper motor Assy, rear wiper rubber, washer nozzle.

Safety Systems:

Supplemental Restraint System, Air Bag Sensor Front, Air Bag Sensor Rear, Seat Position Air Bag Sensor, Side Air Bag Sensor Assy, Center Air Bag Sensor Assy, Curtain Shield Air Bag Assy, Passenger Air Bag Assy, Seat Belt Warning System.

Windows Doors:

Power window control system, front door, rear door, front door glass weatherstrip, rear door glass weatherstrip, back door glass.

Maintenance:

Routine maintenance, lubrication, fluid checks and changes, filter replacements.

Troubleshooting:

Diagnostic procedures, fault finding, common issue resolution.

Repair:

Detailed repair instructions for all major systems and components.

Overhaul:

Engine overhaul, transmission rebuild, suspension component replacement.

Electrical Diagnostics:

Wiring diagrams, wire harness repair, electrical component testing.

Wheel Alignment:

Front and rear wheel alignment procedures and specifications.

Body Repair:

Body panel repair, glass replacement, trim installation.

Depth:

Complete factory-level technical information, suitable for professional mechanics and dedicated enthusiasts.

Diagnostic Codes:

Includes diagnostic information, though formal OBD-II codes are not applicable to this era; focuses on system symptom analysis.

Torque Specs:

Extensive torque specifications for all fasteners and critical components.

Tolerances:

Includes precision measurement and tolerance specifications for engine and mechanical components.

📊 Manual Specifications

Compatibility:

Compatible with all PC and Mac-based operating systems.

Features:

Printable pages for on-site use, allowing for clean copies and easy disposal of soiled pages.

Binding:

N/A (Digital PDF format)

Paper Quality:

N/A (Digital PDF format)

Text Search:

Searchable text content for quick access to specific information.

⚙️ Engine Specifications

Engine Type:

Air-cooled, horizontally-opposed (boxer) 6-cylinder.

Engine Displacement Early:

2.4 Liters (2341 cc)

Engine Displacement Mid:

2.7 Liters (2687 cc)

Engine Displacement Late:

3.0 Liters (2994 cc) and 3.2 Liters (3164 cc), 3.3 Liters (3253 cc) for Turbo.

Horsepower Range:

Approximately 130-210 hp (naturally aspirated), up to 260 hp (930 Turbo).

Torque Range:

Varies by engine displacement and tune, generally increasing with displacement.

Fuel Delivery Early:

Carburetor (e.g., Solex, Zenith)

Fuel Delivery Late:

Bosch K-Jetronic mechanical fuel injection.

Cooling Method:

Air-cooled with oil cooling.

🔧 Transmission

Standard Transmission:

4-speed and 5-speed manual transaxle (e.g., 915 gearbox).

Optional Transmission:

Optional automatic transmission (Sportomatic) was available in earlier years.

Transaxle Layout:

Rear-engine, rear-wheel drive.

📐 Dimensions

Wheelbase:

Approx. 2270 mm (911, 911S, Carrera RS), 2271 mm (911, 911S, Carrera 2.7), 2271 mm (911SC, Carrera 3.0, 930 Turbo) - slight variations by year/model.

Length:

Approx. 4163 mm (911) to 4291 mm (911 SC/Carrera 3.0).

Width:

Approx. 1610 mm (911) to 1775 mm (911 SC/Carrera 3.0).

Curb Weight:

Approximately 1070 kg (911) to 1240 kg (911 SC).

Front Track:

Varies by model, approx. 1370-1460 mm.

Rear Track:

Varies by model, approx. 1350-1440 mm.

🛡️ Safety Features

Crash Safety Era:

While official crash ratings as we know them today were less prevalent, the 911's structure was designed with occupant protection in mind, featuring a robust steel unibody.

Braking:

Four-wheel disc brakes.

Suspension:

Independent suspension on all wheels for stability.

Structure:

Reinforced chassis, crumple zones (early development).

Restraints:

Three-point seat belts (standard in many markets by this era), optional sport seats with integrated harnesses.

💡 Technology Features

Audio System:

Basic analog radio receivers, often with cassette tape players in later years of this range. Some may have had upgraded aftermarket systems.

ABS:

Anti-lock Braking System (ABS) became available on some models towards the end of this period (e.g., 911 SC).

Emission Controls:

Early forms of emission control systems were implemented, including catalytic converters on some export models and air injection systems.

Connectivity Features:

None (pre-digital era).

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 7,500 miles or annually, depending on usage. Refer to manual for precise intervals.

Major Service Interval:

Major services (e.g., valve adjustment, ignition timing) often recommended at 15,000 - 30,000 mile intervals.

Engine Oil:

Air-cooled engine oil requirements vary. Historically, specific multi-viscosity oils like 20W-50 or 15W-50 (often with high zinc content) were recommended. Refer to manual for specific viscosity and API/ACEA classifications for your model year.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Manual Transmission Fluid:

Specific gear oil for manual transaxles, typically GL-4 or GL-5 rated. Refer to manual for viscosity and specifications (e.g., SAE 75W-90 or 80W-90).

Automatic Transmission Fluid:

Specific ATF fluid, refer to manual for type and capacity.

Engine Oil Leaks:

Common due to age and numerous seals in the air-cooled engine; requires regular inspection and maintenance.

Valve Adjustment:

Requires periodic adjustment to maintain performance and engine health.

Fuel System Maintenance:

K-Jetronic systems require careful maintenance; injector seals and pressure regulators can be common service items.

Rust Corrosion:

As with many cars of this era, rust can be a concern in common areas like fender wells, rocker panels, and floor pans, especially in humid climates.

Electrical Gremlins:

Aging wiring harnesses and connectors can lead to intermittent electrical issues.

📚 Vehicle History

Porsche Legacy:

Porsche's reputation for engineering excellence, performance, and motorsport heritage.

G Series Introduction:

The G-Series generation, introduced for the 1974 model year, represented a significant evolution from the original 911, featuring revised bodywork, increased safety, and larger engines. This manual covers the transition and the G-Series itself.

Manufacturing Location:

Stuttgart, Germany.

Key Models Within Range:

911, 911S, Carrera RS 2.7, Carrera 2.7, 911 Carrera 3.0, 911 SC (Super Carrera), 930 Turbo.

🏆 Awards & Recognition

General Recognition:

The Porsche 911 is consistently recognized as an automotive icon, celebrated for its timeless design, driving dynamics, and engineering prowess. Models like the Carrera RS 2.7 are highly sought-after collector cars.

Driving Experience:

Universally praised for its pure driving experience, handling, and connection to the road.

Heritage Certification:

The 911 is considered a benchmark in sports car design and engineering.