The Mazda RX-3, produced from 1971 to 1978, represents a significant chapter in Mazda's automotive history, solidifying its reputation for innovative rotary engine technology. This compact sports coupe, sedan, and less common wagon variant offered a compelling blend of sporty styling, lightweight construction, and driver-focused handling, powered by the unique Mazda Rotary (Wankel) engine, available in 1.16 L (12A) and 1.30 L (13B) displacements. Its key selling points included its distinctive rotary powerplant, agile chassis, and the historical significance of establishing Mazda as a performance-oriented manufacturer. The RX-3's appeal continues to resonate with enthusiasts and restoration specialists who appreciate its unique engineering and spirited performance. This comprehensive Workshop Service Manual (WSM) provides in-depth guidance for the maintenance, repair, and technical understanding of the Mazda RX-3. Covering essential systems such as the rotary powertrain (12A and 13B engines), manual transmissions, chassis, suspension, and electrical systems, this manual details scheduled maintenance, component replacement, and diagnostic procedures. It includes extensive information on engine and transmission rebuild specifications, troubleshooting guides for common issues like apex seal wear and carburetor problems, and electrical system diagnostics. The manual is designed to assist owners, mechanics, and technicians in effectively maintaining and restoring their RX-3, ensuring its longevity and optimal performance. 🏷️ Basic Information Identification Make: Mazda Model: RX-3 Generation: First Generation Codes Chassis Codes: S102A, S124A, S132A, S133A (coupe/sedan), S135A (wagon) Engine Codes: 12A (pre-facelift), 13B (facelift/later models) 👋 Introduction Market Position Segment: Compact sports coupe/sedan/wagon Target Audience: Enthusiasts, DIY mechanics, restoration specialists Competitive Analysis Key Competitors: Toyota Corolla Levin/Sprinter Trueno, Datsun Sunny/B210, Honda Civic Key Features Unique Selling Proposition: Rotary engine, sporty styling, lightweight chassis, driver-focused handling. Historical Significance: Established Mazda's reputation for performance and rotary engine technology. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Manual (WSM) / Repair Manual Language: English Format: Digital (likely PDF, based on common industry practice for older manuals) Page Count Estimated Page Count: 800-1200 (typical for comprehensive WSMs of this era) 📖 Manual Coverage Systems Covered Powertrain: Rotary engine (12A, 13B) theory of operation, disassembly, assembly, lubrication, cooling, fuel injection/carburetion, ignition, exhaust. Transmission: Manual transmission (4-speed, 5-speed), clutch system, drive shafts, rear axle. Chassis And Suspension: Front suspension (independent, MacPherson struts), rear suspension (leaf springs, solid axle), steering system, brakes (front discs, rear drums). Electrical System: Wiring diagrams, battery, charging system (alternator), starting system, lighting, instruments, accessories, engine control unit (ECU) basics. Body And Interior: Body panel removal/installation, door mechanisms, glass, upholstery, dashboard components. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug replacement, coolant flush, brake fluid change, general inspections. Repair: Engine rebuilding, transmission overhaul, brake caliper/master cylinder repair, suspension component replacement, electrical component diagnostics and repair. Troubleshooting: Diagnostic charts for common symptoms, fault finding procedures for engine, transmission, electrical, and braking systems. Technical Depth Diagnostics: Detailed diagnostic procedures, component testing, specifications for electrical circuits and mechanical tolerances. Rebuild Specifications: Complete engine and transmission disassembly/assembly procedures with torque specifications, clearances, and component measurements. 📊 Manual Specifications File Format File Quality: High-resolution scans of original factory documentation, ensuring clarity of diagrams and text. Searchability: Likely text-searchable if converted to PDF with OCR, allowing for quick access to specific information. Print Quality Printability: Designed for printing key sections or the entire manual for workshop use. Binding Type Original Binding: Likely perfect-bound or spiral-bound for original factory manuals. Paper Type Original Paper: High-quality, durable paper suitable for workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Mazda Rotary (Wankel) Engine Engine Displacement 12A: 1.16 L (67 cu in) Engine Displacement 13B: 1.30 L (79 cu in) Performance Horsepower 12A: Approx. 90-100 hp (varies by market and emission controls) Horsepower 13B: Approx. 110-130 hp (varies by market and emission controls) Torque 12A: Approx. 90-100 lb-ft Torque 13B: Approx. 115-125 lb-ft Fuel System Fuel Delivery Early: Downdraft Carburetor (e.g., Hitachi SH220 or similar) Fuel Delivery Late: Fuel Injection (early electronic or mechanical systems) Fuel Type: Unleaded Gasoline (87 octane or higher recommended) Engine Management Ignition System: Distributor-based, points or electronic ignition Rotary Specifics Apex Seals: Crucial wear item, requires specific lubrication and handling. Oil Metering: Separate oil injection system for apex seals and side seals. 🔧 Transmission Standard Type: 4-Speed Manual Optional Type: 5-Speed Manual (later models/performance variants) Automatic: Rarely offered or not widely documented for this generation Features Clutch Type: Dry Single Plate Transmission Fluid Specifications: API GL-4 Hypoid Gear Oil (e.g., SAE 80W-90) 📐 Dimensions Exterior Wheelbase: Approx. 97.4 inches (2475 mm) Length: Approx. 165.7 inches (4209 mm) Width: Approx. 63.9 inches (1623 mm) Height: Approx. 52.0 inches (1321 mm) (Coupe) Weights Curb Weight: Approx. 2100-2400 lbs (950-1090 kg) Wheels And Tires Bolt Pattern: 4x110 mm Standard Tire Size: 165/80 R13 (early), 175/70 R13 (later) 🛡️ Safety Features Ratings Crash Test Data: Limited official crash test data available from this era. Vehicle designed with crumple zones typical for...