🏷️ Basic Information

Make:

Porsche

Model:

911

Year:

1974

Chassis Code:

G-Series

Engine Codes Covered:

911/92, 911/93

👋 Introduction

Vehicle Segment:

Luxury Sports Car

Target Audience Of Manual:

Porsche Dealership Technicians, Independent Porsche Specialists, Enthusiast DIY Mechanics

Competitors 1974:

Ferrari Dino 246 GT, Jaguar E-Type, Chevrolet Corvette (C3)

Vehicle Design Philosophy:

Rear-engine, air-cooled, iconic silhouette, driver-focused performance

Manual Value Proposition:

Provides factory-level accuracy and detail for accurate maintenance and repair, preserving the vehicle's integrity and value

📋 Manual Details

Manual Coverage Scope:

Comprehensive factory service and repair

Approximate Page Count:

600+

Manual Classification:

Factory Service Manual / Workshop Manual

Language Of Publication:

English

Typical Format:

Printed Book

📖 Manual Coverage

Mechanical Systems:

Engine, Fuel System, Ignition System, Lubrication System, Cooling System, Clutch, Transmission, Drive Axles, Suspension (Front & Rear), Steering, Brakes

Electrical Systems:

Electrical System Overview, Charging System, Starting System, Ignition System Components, Lighting, Instruments and Gauges, Wiper/Washer System, Horn, Radio, Air Conditioning (if equipped)

Body And Chassis:

Body Shell, Doors, Hoods, Bumpers, Interior Trim, Seats, Glass, Body Repairs, Sealing

Maintenance Procedures:

Routine Maintenance Checks, Lubrication Schedule, Filter Replacements, Spark Plug Service, Valve Adjustment

Repair Procedures:

Engine Rebuild (Disassembly & Assembly), Transmission Overhaul, Brake System Overhaul, Suspension Component Replacement, Steering System Repair, Fuel System Servicing, Electrical Component Diagnostics and Repair

Diagnostic Procedures:

Troubleshooting Guides, Symptom-based Diagnostics, Electrical Schematics Interpretation, Mechanical Component Testing

Diagnostic Level:

Advanced diagnostics with detailed troubleshooting flowcharts and electrical diagrams

Rebuild Level:

Complete engine and transmission disassembly and reassembly procedures, including torque specifications and clearances

Information Detail:

Detailed specifications, schematics, exploded views, and step-by-step instructions for all factory procedures

📊 Manual Specifications

Digital File Format If Applicable:

N/A (Typically printed, but digital versions may exist)

Paper Quality:

Durable, high-quality paper suitable for workshop environments

Illustration Clarity:

Clear, crisp line drawings and diagrams

Binding Method:

Stitched and glued binding for durability

Page Layout:

Organized by system and procedure, often with pull-out wiring diagrams

⚙️ Engine Specifications

Engine Type:

Air-cooled, flat-six (Boxer)

Displacement Cc:

2687

Displacement Ci:

164

Horsepower Bhp:

175

Torque Lb Ft:

210

Fuel Delivery:

Bosch Mechanical Fuel Injection (CIS - Continuous Injection System)

Fuel Type Recommended:

Premium Unleaded Gasoline (91+ Octane)

Oil Capacity Liters:

9.0

Oil Capacity Quarts:

9.5

Oil Type Specification:

API SG or higher, SAE 20W-50 (or per Porsche recommendation based on climate)

🔧 Transmission

Transmission Type Std:

5-Speed Manual Transaxle (Type 915)

Clutch Type:

Single dry plate, hydraulically operated

Transmission Fluid Type:

GL-4 Gear Oil (e.g., Mobilube PTX 75W-90 or equivalent)

📐 Dimensions

Length Mm:

4161

Width Mm:

1651

Height Mm:

1310

Wheelbase Mm:

2271

Curb Weight Kg:

1100

Curb Weight Lbs:

2425

🛡️ Safety Features

Crash Test Ratings Era:

No standardized ratings comparable to modern tests exist for this era

Braking System Type:

Four-wheel hydraulic disc brakes (ventilated front)

Front Brake Rotor Diameter Mm:

282

Rear Brake Rotor Diameter Mm:

274

Seat Belts:

3-point inertia reel seat belts

Steering Column Safety:

Collapsible steering column

💡 Technology Features

Radio System:

Optional factory-installed AM/FM radio, often with a cassette player later in the G-series run, but likely AM/FM for '74

ABS Availability:

Not available on 1974 models

🔧 Maintenance

Oil Change Interval Miles:

5,000 - 7,500 (or annually)

Major Service Interval Miles:

15,000 - 30,000 (includes valve adjustment, spark plugs, fuel filter, etc.)

Brake Fluid Type:

DOT 4

Coolant Type:

Not applicable (Air-cooled engine)

Engine Mounts:

Degradation and potential failure of rubber engine mounts

Fuel System Cis:

Potential for wear in the fuel distributor, airflow sensor plate, and injectors, leading to running issues

Oil Leaks:

Common from engine seals, crankcase, and oil lines due to age and heat

Transmission Synchros:

Wear in synchromesh rings, particularly in 3rd and 4th gears, can lead to difficult shifting

Body Rust:

Prone to rust in wheel arches, sills, door bottoms, and longitudinals, especially in humid climates or if not properly maintained

📚 Vehicle History

Brand Founding Year:

1931

Brand Focus:

High-performance sports cars and race cars

First Generation 911 Year:

1963

1974 Model Introduction:

Marked the introduction of the G-Series chassis with significant safety and styling updates, including integrated bumpers

G Series Era:

1974-1989

Manufacturing Location:

Stuttgart, Germany

🏆 Awards & Recognition

Automotive Design Awards Era:

While specific awards for the '74 model might not be readily available, the Porsche 911 lineage is consistently lauded for its timeless design and engineering prowess.

Collectibility Rating:

High, considered a classic and desirable sports car

Manual Accuracy Standard:

Factory-issued, adhering to Porsche's engineering and service standards