Mazda RX-3 1975 Service Repair Manual

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🏷️ Basic Information Identification Make: Mazda Model: RX-3 Year: 1975 Model Codes: S102, S124, S132 (Chassis Codes may vary by body style and market) Codes Engine Code Primary: 12A (Rotary)...

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Tipo: Coches

Proveedor:

SKU: 350710

Etiquetas: 1975 Car Cars Mazda RX Models RX-3

Variantes de producto

Descripción

🏷️ Basic Information

Identification

Make:

Mazda

Model:

Year:

Model Codes:

S102, S124, S132 (Chassis Codes may vary by body style and market)

Codes

Engine Code Primary:

12A (Rotary)

👋 Introduction

Market Position

Target Audience:

Enthusiasts, DIY mechanics, classic car restorers, and professional automotive technicians specializing in rotary engines.

Competitive Analysis

Manual Value Proposition:

Provides factory-level diagnostic and repair information crucial for maintaining the unique rotary powertrain and classic Japanese vehicle systems.

Key Features

Key Features Of Manual:

Comprehensive coverage, detailed diagrams and illustrations, troubleshooting guides, factory specifications, Rotary engine specific data.

📋 Manual Details

Coverage Areas

Markets Covered:

Primarily North American market, with potential applicability to other international markets given the general nature of service procedures.

Page Count

Estimated Page Count:

Likely 500+ pages, typical for comprehensive factory service manuals of this era.

Manual Type

Manual Type:

Factory Service & Repair Manual

Language

Language:

English

Format

File Format:

Delivery

File Delivery Method:

Digital Download (.rar/.zip archive)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete engine disassembly, inspection, assembly, timing, seals, rotary apex seal details, rotor housing machining, lubrication system overhaul.

Engine Lubrication System:

Oil pump, oil cooler, oil filter, oil passages, oil pan removal/installation, oil specifications.

Engine Cooling System:

Radiator, water pump, thermostat, hoses, coolant specifications, fan operation, flush and fill procedures.

Engine Control System:

Ignition timing, distributor, spark plugs, coils, ignition module, idle speed control (if applicable), diagnostic procedures for ignition system faults.

Fuel System:

Carburetor (likely Hitachi), fuel pump, fuel filter, fuel lines, float bowl adjustment, jetting, vacuum secondary operation, cold start enrichment.

Exhaust System:

Exhaust manifold, catalytic converter (if fitted to US models), muffler, pipes, hangers, seals, torque specifications.

Accelerator Control System:

Throttle cable adjustment, linkage inspection, pedal assembly.

Clutch:

Clutch disc, pressure plate, release bearing, pilot bearing, clutch master cylinder, slave cylinder, hydraulic fluid specifications, bleeding procedures.

Manual Transmission:

Gearbox disassembly, inspection, gear ratios, synchromesh, bearings, seals, lubrication, shift linkage adjustment.

Automatic Transmission:

Transmission disassembly, torque converter, valve body, clutch packs, bands, fluid types and capacities, band adjustment, troubleshooting.

Propeller Shaft:

Driveshaft removal, balancing, U-joint inspection and replacement, universal joint grease specifications.

Rear Final Drive:

Differential disassembly, ring gear and pinion gear backlash adjustment, bearing pre-load, axle shaft removal, fluid specifications.

Front Axle:

Wheel bearings, spindle, hub assembly, steering knuckle, grease specifications.

Rear Axle:

Axle shaft removal, bearings, seals, hub assembly, brake drum removal.

Front Suspension:

Shock absorbers, coil springs, control arms, ball joints, bushings, tie rod ends, wheel alignment specifications, camber, caster, toe.

Rear Suspension:

Leaf springs (if applicable), shock absorbers, trailing arms, Panhard rod (if applicable), bushings, wheel alignment specifications.

Brake System:

Front disc brakes, rear drum brakes, brake calipers, master cylinder, brake lines, brake fluid specifications, bleeding procedures, parking brake adjustment.

Parking Brake System:

Parking brake cables, mechanism, adjustment, drum brake shoe linkage.

Brake Control System:

Proportioning valves, metering valves (if present), brake system diagnostics.

Steering Control System:

Steering box, steering column, power steering pump (if equipped), power steering fluid, tie rod ends, steering linkage, alignment.

Seat Belts:

Seat belt anchor points, retractors, webbing inspection, adjustment.

Supplemental Restraint System Srs:

Not applicable for 1975 models. SRS systems were not standard or common.

Body Lock And Security System:

Door locks, ignition lock cylinder, trunk lock, keyless entry (not applicable), alarm systems (not applicable).

Glasses Window System And Mirrors:

Window regulator mechanisms, door glass removal/installation, weatherstripping, mirror adjustment and replacement.

Exterior And Interior:

Door panel removal, trim pieces, dashboard, interior upholstery, exterior trim, emblems, bumpers.

Instrument Panel:

Instrument cluster removal/installation, gauge functions (speedometer, tachometer, fuel, temp), warning lights, illumination.

Seat:

Seat adjustment mechanisms, seat rail lubrication, seat cover replacement.

Automatic Air Conditioner:

A/C system components (compressor, condenser, evaporator), refrigerant type (R-12), charging procedures, leak detection, blower motor, controls.

Starting And Charging System:

Starter motor, solenoid, battery specifications, alternator, voltage regulator, wiring diagrams.

Lighting System:

Headlights, taillights, brake lights, turn signals, interior lights, fuse box location, bulb types, wiring diagrams.

Driver Information System:

Basic driver information; typically limited to gauge readouts and warning lights for this era.

Wiper Washer And Horn:

Wiper motor, wiper blades, washer fluid reservoir, pump, nozzles, horn operation, switch testing.

Body Control System:

Basic body electrical controls; not sophisticated computer-based systems.

Lan System:

Not applicable for 1975 models. LAN (Local Area Network) systems are a modern automotive feature.

Audio Visual Navigation And Telephone System:

Basic AM/FM radio, antenna, speaker wiring. Navigation and telephone systems are not applicable.

Auto Cruise Control System:

If equipped, covers vacuum or electronic cruise control system components, vacuum lines, actuators, and control module.

Power Supply Ground And Circuit Elements:

Detailed wiring diagrams, fuse box layouts, relays, grounds, power distribution, circuit tracing.

Procedures Included

Maintenance:

Routine maintenance, fluid changes, filter replacements, lubrication points, tune-up procedures, belt adjustments.

Troubleshooting:

Diagnostic flowcharts, symptom-based troubleshooting, component testing, common fault identification for engine, transmission, brakes, electrical systems.

Repair:

Step-by-step instructions for component replacement, overhaul, and repair across all covered systems.

Installation:

Procedures for installing new or replacement parts and components.

Specifications:

Torque specifications, clearances, fluid capacities, electrical resistance values, pressure tests, alignment angles.

Diagnostic Charts:

Fault finding charts for electrical and mechanical systems.

Technical Depth

Depth Of Coverage:

Comprehensive, covering from basic maintenance to complete engine and transmission rebuilds. Highly detailed for professional technicians.

📊 Manual Specifications

File Format

PDF Quality:

Assumed to be scanned from original factory manual; text searchability may vary but should be adequate.

Print Quality

Printable:

Binding Type

Binding Type:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

Software Requirements

Required Software:

ZIP/RAR decompression utility (e.g., 7-Zip, WinRAR), PDF reader (e.g., Adobe Acrobat Reader).

⚙️ Engine Specifications

Primary Engine

Engine Type:

Rotary (Wankel)

Engine Displacement:

1146cc (approx. 69.9 cubic inches) - typically referred to as the 12A engine.

Rotor Design:

Single Rotor (though twin-rotor models existed in other Mazda lineups, the RX-3 primarily featured a single rotor engine for standard models).

Performance

Horsepower Approx:

Around 100-110 hp (SAE Gross) for the standard 12A engine.

Torque Approx:

Around 100-110 lb-ft (SAE Gross).

Fuel System

Carburetor Type:

Hitachi twin-throat downdraft carburetor (e.g., Hitachi DC-D10).

Fuel Type:

Unleaded gasoline (as required by EPA regulations introduced around this time).

Engine Lubrication

Oil Type Recommendation:

API SE service classification, SAE 20W-50 or 10W-30 depending on climate. Specific rotary-specific oils are ideal.

Engine Cooling

Coolant Type:

Ethylene glycol based antifreeze mixed with water (typically 50/50).

🔧 Transmission

Standard

Standard Transmission Type:

4-speed manual transmission.

Optional

Optional Transmission Type:

3-speed automatic transmission (e.g., JATCO 3N71B).

Features

Transmission Fluid Type Manual:

GL-4 hypoid gear oil, SAE 80W-90.

Transmission Fluid Type Automatic:

Dexron II or equivalent automatic transmission fluid.

📐 Dimensions

Exterior

Body Styles:

2-door Sedan, 4-door Sedan, Coupe, and potentially a Station Wagon (Savanna).

Wheelbase Approx:

95.0 - 100.4 inches (varies by body style).

Overall Length Approx:

160 - 175 inches (varies by body style).

Weights

Curb Weight Approx:

2200 - 2500 lbs (varies by body style and transmission).

🛡️ Safety Features

Ratings

Safety Ratings Era:

No standardized crash test ratings (like NHTSA) were in place or published for vehicles of this era in the same way they are today.

Active Features

Active Safety Features:

Brake system (front discs, rear drums), steering system. ABS, traction control, stability control not present.

Passive Features

Passive Safety Features:

Seat belts (lap belts for front, possibly lap belts for rear). Body structure designed for crash energy absorption typical of the era.

💡 Technology Features

Infotainment

Infotainment Features:

Basic AM/FM radio, possibly with an 8-track player or cassette player in later iterations or aftermarket installations. Speaker system is rudimentary.

Driver Assistance

Driver Assistance Features:

None in the modern sense. Features like cruise control might have been optional on some models.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000 miles or 3 months, whichever comes first.

Spark Plug Replacement:

Every 15,000 - 20,000 miles. Specific rotary spark plugs required (often two per rotor housing).

Transmission Fluid Change Interval:

Manual: Every 30,000 miles or 24 months. Automatic: Every 24,000 miles or 24 months.

Fluid Specifications

Brake Fluid Type:

DOT 3 or DOT 4.

Differential Fluid Type:

GL-5 hypoid gear oil, SAE 80W-90.

Known Issues

Common Rotary Issues:

Apex seal wear, rotor housing scoring, oil seal failure, carbon buildup in apex seal grooves. Requires specific care and maintenance to avoid premature wear.

Carburetor Issues:

Diaphragm wear in Hitachi carburetors, vacuum leaks, jet clogging leading to poor idling or fuel delivery.

Cooling System Issues:

Corrosion in the radiator, water pump seal leaks, thermostat sticking.

📚 Vehicle History

Brand Heritage

Mazda Rotary History:

Mazda's pioneering work with the Wankel rotary engine began in the 1960s, with the Cosmo being its first production car. The RX-3 was a significant step in bringing rotary performance to a more accessible segment.

Model Evolution

Rx3 Introduction:

Introduced in Japan as the Savanna in 1971, it was marketed internationally as the RX-3. It succeeded the RX-2. Known for its sporty handling and unique rotary engine.

Production

Production Period:

1971-1978.

🏆 Awards & Recognition

Recognitions

Automotive Awards:

The RX-3, particularly the Savanna variant in Japan, was well-regarded for its sporty driving dynamics and unique rotary powerplant, often praised by automotive journalists of the era for its performance in its class.