🏷️ Basic Information Identification Make: Mazda Model: RX-3 Year: 1975 Codes Chassis Codes: S102, S122, S132 Engine Codes: 12A 👋 Introduction Market Position Positioning: The Mazda RX-3 was positioned as a sporty compact car, often appealing to enthusiasts due to its unique rotary engine and lightweight chassis. Competitive Analysis Competitors: Competed with vehicles like the Datsun 510, Toyota Corolla, and Ford Escort, offering a distinct performance alternative. Key Features Appeal: Unique rotary engine, sporty handling, compact size, distinctive styling. Manual Value Value Proposition: Provides essential information for owners and mechanics to maintain, diagnose, and repair the 1975 Mazda RX-3, saving on professional labor costs. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Secondary Coverage: Diagnostics, Maintenance, Troubleshooting Page Count Estimated Page Count: Varies by specific edition, typically 500-1000+ pages for a comprehensive workshop manual. Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Rotary engine (12A) overhaul, diagnostics, lubrication, cooling, fuel system, ignition system. Transmission: Manual transmission (4-speed, 5-speed) service, clutch, driveshaft, differential. Drivetrain: Rear-wheel drive system, axle, hubs, wheels. Brakes: Front disc brakes, rear drum brakes, hydraulic system, parking brake. Steering: Manual steering system, steering column, steering gear. Suspension: Front independent suspension (MacPherson struts), rear leaf spring suspension, shock absorbers, bushings. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system components and service. Body Safety: Body panel repair, door mechanisms, seat belts, chassis. Electrical: Wiring diagrams, lighting system, ignition system, charging system, starting system, instrument cluster, accessories. Parts: Part identification and exploded diagrams for major components. Procedures Included Maintenance: Oil changes, filter replacements, spark plug (apex seal) checks, cooling system flush, brake fluid replacement. Repair: Engine rebuild (apex seal replacement, rotor housing inspection), transmission overhaul, brake caliper/drum service, suspension component replacement, electrical component repair. Diagnostics: Troubleshooting engine performance issues, electrical system faults, braking problems. Adjustments: Carburetor adjustment, ignition timing, brake adjustment, clutch adjustment. Technical Depth Depth: Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures. 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High quality, printable pages with clear diagrams and text. Binding Type Type: Digital Download (No physical binding) Paper Type Type: Not applicable (digital format) Compatibility Operating Systems: All Versions of Windows & Mac Requirements Software: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Type: Mazda 12A Rotary Engine (Wankel) Displacement: 1146 cc (69.9 cubic inches) - equivalent displacement for rotary Rotor Design: Two-rotor, side-port induction Performance Horsepower: Approximately 100-110 hp (SAE Gross) depending on emissions equipment and specific tuning. Torque: Approximately 100-110 lb-ft (SAE Gross). Fuel System Induction: Single or dual barrel carburetor (e.g., Hitachi or Nikki). Fuel Type: Unleaded Gasoline Lubrication Oil Type: API SG or higher, SAE 10W-30 or 10W-40 recommended. Specific rotary oil additives may be recommended. Cooling System: Pressurized liquid cooling system, electric cooling fan or engine-driven fan. Ignition System: Distributor-based, single ignition coil. 🔧 Transmission Standard Type: 4-speed Manual Transmission Optional Type: 5-speed Manual Transmission, 3-speed Automatic Transmission (less common for performance models) Features Clutch: Dry single-plate clutch. Fluid Type: GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90). 📐 Dimensions Exterior Body Styles: Coupe, Sedan, Station Wagon Wheelbase: Approximately 95.3 inches (2420 mm) Length: Approximately 161.2 inches (4095 mm) for Coupe Width: Approximately 63.6 inches (1615 mm) Height: Approximately 52.2 inches (1325 mm) for Coupe Weights Curb Weight: Approximately 2100-2300 lbs (950-1045 kg) depending on body style and equipment. 🛡️ Safety Features Ratings Crash Safety: No formal crash test ratings available from modern agencies for this era vehicle. Safety features were basic. Active Features Features: Brake system, handling dynamics. Passive Features Features: Lap and shoulder belts, reinforced body structure (for the era). 💡 Technology Features Infotainment Features: Basic AM/FM radio, potentially with a cassette player in later models. No advanced infotainment systems. Driver Assistance Features: None by modern standards. Relied on driver skill and basic vehicle dynamics. Connectivity Features: None. 🔧 Maintenance Service Intervals Oil Change: Every 3,000 miles or 3 months, whichever comes first. Rotary engines require frequent oil changes. Air Filter: Inspect every 6 months, replace as needed (typically every 12-24 months). Spark Plugs: Inspect and replace every 12,000-15,000 miles. Specific rotary plugs may be required. Coolant Flush: Every 24 months or 24,000 miles. Fluid Specifications Engine Oil Capacity: Approximately 4.5 liters (4.8 US quarts) with filter change. Coolant Capacity: Approximately 6.5 liters (6.9 US quarts). Brake Fluid Type: DOT 3 or DOT 4. Known Issues Rotary Engine: Apex seal wear is the most common issue, leading to compression loss. Needs regular oil changes and proper warm-up/cool-down procedures. Carburetor: Can become clogged or require frequent adjustment due to age and fuel quality variations. Electrical: Aging wiring harnesses and components can lead to intermittent faults. Rust: Common for vehicles of this era, particularly in areas with road salt. 📚 Vehicle...