🏷️ Basic Information

Make:

Mazda

Model:

RX-3

Production Years:

1971-1978

Chassis Codes:

S102, S124, S132

Engine Code Series:

Mazda "Rotary" (12A, 13A)

👋 Introduction

Target Audience:

Do-it-yourselfers and experienced mechanics.

Value Proposition:

Inexpensive way to maintain and repair the vehicle, empowering owners to avoid costly mechanic fees.

Availability:

As vehicles age, factory service information becomes scarce; this digital manual provides accessible documentation.

Instruction Style:

Easy-to-read text, step-by-step instructions, detailed exploded pictures and diagrams.

Visual Aids:

Hundreds of photos and illustrations, detailed drawings.

Usability:

Printable pages for in-garage use, digital format for easy transfer and storage.

📋 Manual Details

Primary Coverage:

Factory Service Repair Workshop Manual

Specific Models Covered:

All Mazda RX-3 variants (Coupe, Sedan, Wagon)

Estimated Page Count:

Varies by specific edition, but comprehensive manuals typically range from 500-1500 pages.

Type:

Factory Service Manual (FSM) / Workshop Manual

Language:

English

File Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, component inspection, lubrication, timing, seals, rotary apex seal replacement, rotor housing machining.

Cooling System:

Radiator, water pump, thermostat, hoses, fan, coolant specifications, leak testing.

Starting And Charging:

Starter motor, battery, alternator, voltage regulator, wiring diagrams, testing procedures.

Ignition System:

Distributor, spark plugs, ignition coils, dwell angle, timing adjustments, electronic ignition components.

Fuel System:

Carburetor(s) (e.g., Hitachi, Mikuni), fuel pump, fuel lines, fuel filter, fuel pressure, cleaning and adjustment procedures.

Emission Controls:

Air injection systems, PCV (Positive Crankcase Ventilation), EGR (Exhaust Gas Recirculation), thermal reactors, catalytic converters (later models), vacuum diagrams.

Engine Controls:

Vacuum control systems, thermal vacuum switches, control solenoids.

Transmission:

Manual transmission (4-speed, 5-speed) and automatic transmission (e.g., Toyoglide), clutch operation, transmission overhaul, gear ratios, fluid specifications.

Driveline:

Driveshaft, universal joints, rear axle, differential, wheel bearings, maintenance and overhaul.

Suspension:

Front independent suspension (struts, control arms), rear leaf springs (later models) or live axle, shock absorbers, bushings, alignment specifications.

Steering:

Steering gear, tie rods, steering linkage, power steering system (if equipped), steering wheel removal.

Brakes:

Front disc brakes, rear drum brakes, hydraulic system, master cylinder, wheel cylinders, brake lines, parking brake, bleeding procedures, specifications.

Electrical:

Wiring diagrams, lighting circuits, instrument panel, switches, fuses, relays, horn, wipers, power windows (if equipped).

Body Interior Exterior:

Body panel removal and installation, door mechanisms, window regulators, seat adjustment, interior trim, exterior trim, bumpers, lighting fixtures.

HVAC:

Heating, ventilation, and air conditioning systems (if equipped), components, refrigerant, service procedures.

Instrumentation And Warning Systems:

Speedometer, tachometer, fuel gauge, temperature gauge, oil pressure warning light, brake warning light, diagnostic indicators.

Maintenance:

Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid checks and changes, lubrication.

Troubleshooting:

Diagnostic guides, symptom-based troubleshooting, common problems and their solutions.

Repair:

Step-by-step instructions for component repair, overhaul, and replacement.

Disassembly And Assembly:

Complete disassembly and reassembly procedures for major vehicle systems.

Electrical Diagnostics:

Detailed wiring diagrams, component testing, fault finding.

Engine Rebuild:

Comprehensive instructions for rebuilding the rotary engine, including specific clearances and tolerances.

Depth:

Complete Factory Service Manual coverage from basic maintenance to complex engine and transmission rebuilds.

Detail Level:

Highly detailed with step-by-step instructions, exploded views, diagrams, and photographs.

📊 Manual Specifications

Format:

PDF

Compatibility:

Windows and Mac OS

Searchability:

Generally searchable PDF text.

Printability:

All pages are printable.

Binding:

Digital (No physical binding)

Paper Type:

Digital (No physical paper)

⚙️ Engine Specifications

Engine Type:

Rotary (Wankel)

Engine Codes:

12A (573cc per rotor, 1146cc total displacement equivalent), 13A (654cc per rotor, 1308cc total displacement equivalent)

Rotor Housing Material:

Chromium-plated alloy steel

Horsepower Range:

Approximately 90-110 hp (SAE Gross), depending on model year and emissions equipment.

Torque Range:

Approximately 100-120 lb-ft (SAE Gross), depending on model year and emissions equipment.

Carburetion:

Dual downdraft Hitachi or Mikuni carburetors are common.

Fuel Type:

Unleaded gasoline (later models may require specific octane ratings due to emissions controls).

Apex Seal Life:

Apex seal wear is a critical maintenance point; refer to manual for inspection and replacement procedures.

🔧 Transmission

Manual Transmission:

4-speed and 5-speed manual transmissions were widely available.

Automatic Transmission:

Optional 3-speed automatic transmission (e.g., Toyoglide).

Clutch Type:

Dry single-plate clutch.

Manual Transmission Fluid:

API GL-4 SAE 75W-90 or SAE 80W-90 gear oil is typically recommended. Consult manual for exact specification.

Automatic Transmission Fluid:

Dexron II or equivalent (check manual for exact specification).

📐 Dimensions

Wheelbase:

Approximately 97.0 inches (2465 mm)

Length:

Approximately 164.0 inches (4165 mm)

Width:

Approximately 64.4 inches (1635 mm)

Height:

Approximately 53.0 inches (1345 mm) for Coupe.

Curb Weight:

Approximately 2,200 - 2,500 lbs (1000 - 1135 kg), depending on body style and equipment.

Gross Vehicle Weight Rating:

Refer to vehicle's compliance plate or manual for specific GVWR.

🛡️ Safety Features

Crash Test Data:

No formal crash test data from modern agencies (NHTSA, IIHS) is readily available for this era of vehicle. Safety features were limited by the standards of the time.

Braking System:

Front disc brakes, rear drum brakes. No ABS or other advanced braking aids.

Seatbelts:

Lap and shoulder belts (front), lap belts (rear).

Structure:

Reinforced chassis and body structure as per 1970s automotive safety standards.

💡 Technology Features

Audio System:

Basic AM/FM radio, often with an 8-track player or cassette player as optional upgrades in later years.

N A:

No driver-assistance technologies such as ABS, traction control, or airbags were standard or commonly available in this era.

N A:

No integrated connectivity features like Bluetooth or USB.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000 miles or 3 months. Consult manual for specific recommendation.

Spark Plug Replacement:

Varies by plug type, but often around 10,000-20,000 miles. Refer to manual for specific part numbers and intervals.

Timing Belt Chain Check:

Rotary engines use a chain; refer to manual for inspection intervals and tensioner checks.

Engine Oil:

API SE/SF SAE 10W-30 or 10W-40. Check manual for specific viscosity and API rating.

Coolant:

Ethylene glycol based coolant (50/50 mix with distilled water). Refer to manual for specific type and capacity.

Brake Fluid:

DOT 3 or DOT 4 brake fluid. Refer to manual for exact specification.

Differential Fluid:

API GL-5 SAE 80W-90 gear oil. Refer to manual for capacity.

Apex Seal Wear:

Apex seal wear leading to compression loss is a common characteristic of older rotary engines. Regular checks and proper maintenance are crucial.

Carburetor Tuning:

Carburetors require periodic adjustment and cleaning to maintain optimal performance and emissions.

Vacuum Leaks:

Degradation of rubber vacuum hoses can lead to vacuum leaks, affecting engine performance and emissions control.

Cooling System Maintenance:

Ensuring the cooling system is clean and efficient is vital for rotary engine longevity.

📚 Vehicle History

Mazda Rotary Pioneering:

The RX-3 is a significant model in Mazda's history as a continuation of their commitment to the rotary engine, following the RX-2. It solidified Mazda's reputation for performance and innovation in compact sports cars.

Generations:

The RX-3 was produced over a single generation but received styling and mechanical updates during its lifespan. Key updates included changes to emissions equipment and styling revisions.

Body Styles:

Available as a 2-door Coupe, 4-door Sedan, and a 5-door Wagon.

Manufacturing Location:

Japan

Production Volume:

Significant global sales, though precise numbers for the RX-3 alone are often combined with other Mazda rotary models of the era.

🏆 Awards & Recognition

Performance Reputation:

The RX-3 gained a reputation for sporty handling and performance, particularly among enthusiasts, due to its lightweight chassis and unique rotary engine.

Motorsport History:

The RX-3 and its rotary engines have a significant history in motorsport, including successful campaigns in touring car racing and rallying, further enhancing its iconic status.