🏷️ Basic Information Identification Make: Mazda Model: RX-4 Model Designation: Mazda RX-4 (also known as Mazda Luce Rotary Coupe/Sedan) Generation Production Years Covered: 1975, 1976, 1977 Codes Chassis Codes: MA (sedan), VB (coupe) 👋 Introduction Market Position Target Audience: Professional automotive technicians and experienced DIY enthusiasts Competitive Analysis Value Proposition: Provides expert-level technical data essential for maintaining and repairing a classic Mazda rotary vehicle, mirroring factory service information. Key Features Comprehensiveness: Covers all major repair topics from A-Z for all models and trims within the specified years. Format Benefit: Easy-to-read PDF format enhances usability and accessibility for digital users. 📋 Manual Details Coverage Areas Covered Models: All RX-4 models (sedan, coupe, and potentially wagon if applicable within the timeframe) Covered Trim Levels: All available trim levels for the 1975-1977 model years Page Count Estimated Page Count: Likely 500+ pages (typical for comprehensive service manuals of this era) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Rotary engine (12A) diagnosis, repair, overhaul, timing, lubrication, cooling, emissions control Fuel System: Carburetor (likely Hitachi or similar), fuel pump, fuel lines, fuel tank servicing Transmission: Manual transmission (4-speed, 5-speed), automatic transmission (TorqueFlite derivative) repair, clutch system, driveshaft, differentials Brakes: Front disc brakes, rear drum brakes, hydraulic system, parking brake, brake fluid specifications Suspension: Front independent suspension (struts/coil springs), rear leaf springs/live axle, steering system, wheel alignment specifications Electrical System: Ignition system (distributor, points, coil), charging system (alternator), starting system (starter motor), lighting, gauges, wiring diagrams, fuse box Cooling System: Radiator, water pump, thermostat, hoses, coolant specifications, fan operation Exhaust System: Manifold, catalytic converter (if applicable for market), muffler, pipes, emission control routing Body And Chassis: Body panel removal/installation, interior trim, glass replacement, door mechanisms, body repair procedures Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid level checks, lubrication points Troubleshooting: Diagnostic charts, symptom-based troubleshooting for engine, electrical, and mechanical issues Repair: Component-level repair and overhaul for all major systems Overhaul: Detailed procedures for engine (rotary) rebuild and transmission overhaul Installation: Procedures for replacing major components and accessories Technical Depth Depth: Comprehensive, covering routine maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures. 📊 Manual Specifications File Format Quality: High-quality PDF, optimized for readability and printing Searchability: Searchable text content for quick information retrieval Print Quality Printability: Printable pages Binding Type Digital Format: Not applicable (digital PDF) Paper Type Digital Format: Not applicable (digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Rotary (Wankel) Engine Code: 12A Displacement: 1146 cc (2 x 573 cc rotors) Rotor Housing Design: Single-rotor housing with trochoidal shape Performance Horsepower Range: Approximately 90-110 hp (depending on market and emissions controls) Torque Range: Approximately 100-115 lb-ft Fuel System Carburetor Type: Likely twin-choke downdraft carburetor (e.g., Hitachi DCAS series) Fuel Type: Unleaded gasoline (depending on market regulations) Cooling System Cooling Method: Water-cooled Lubrication System Oil Type Recommendation: API SF or SG service classification, SAE 10W-30 or 10W-40 recommended (refer to manual for exact specification) Emissions Control Emissions Features: Likely includes air injection system, EGR (Exhaust Gas Recirculation), and potentially early catalytic converter technology. 🔧 Transmission Standard Transmission Type Std: 4-speed manual Optional Transmission Type Opt: 3-speed automatic (likely a derivative of Chrysler's TorqueFlite) Features Clutch Type: Single dry plate clutch Gear Ratios: Specific gear ratios for manual and automatic transmissions will be detailed in the manual. Fluid Specification Manual Transmission Fluid: GL-4 gear oil, SAE 75W-90 or 80W-90 (verify with manual) Automatic Transmission Fluid: Dexron II or equivalent (verify with manual) 📐 Dimensions Exterior Body Styles: 2-door Coupe, 4-door Sedan Wheelbase Coupe: Approx. 98.0 inches (2489 mm) Wheelbase Sedan: Approx. 100.8 inches (2560 mm) Weights Curb Weight: Approx. 2500-2800 lbs (1134-1270 kg), varying by body style and equipment. Gross Vehicle Weight Rating: Specific GVWR will be listed in manual or vehicle data plate. 🛡️ Safety Features Ratings Crash Test Data: No standardized crash test ratings like NHTSA/IIHS existed for this era. Manual will cover passive safety features of the time. Active Features Braking System Type: Front disc, rear drum Parking Brake Type: Mechanical lever operating rear brakes Passive Features Seat Belts: Standard lap and shoulder belts (front), lap belts (rear) Steering Column: Collapsible steering column (design varies by market and specific year) Body Construction: Unit-body construction with crumple zones (early design principles) 💡 Technology Features Infotainment Radio System: Likely analog AM/FM radio, possibly with an 8-track player or cassette deck as optional equipment. Gauges And Instruments: Full complement of analog gauges including speedometer, tachometer, fuel, temperature, and oil pressure. Driver Assistance ABS Availability: Anti-lock Braking System (ABS) was not available on this model. Cruise Control: Optional on some models, typically a vacuum-operated system. Connectivity Modern Connectivity: No modern connectivity features like Bluetooth or USB. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 3,000-5,000 miles or...