🏷️ Basic Information Identification Make: Mazda Model: RX-4 Year: 1972 Product Type: Service and Repair Manual Codes Chassis Code Family: LA2 Engine Code Family: Mazda Rotary (Wankel) 👋 Introduction Market Position Original Market Segment: Compact/Subcompact Sports Sedan and Coupe Unique Selling Proposition: Revolutionary rotary (Wankel) engine offering compact size, smooth operation, and unique performance characteristics. Competitive Analysis Key Competitors 1972: Datsun 510, Toyota Corolla, Honda Civic (emerging), Ford Escort. Key Features Vehicle Distinctiveness: Wankel rotary engine, stylish coupe and sedan body styles, sporty handling for its era. Manual Value Proposition: Indispensable resource for enthusiasts and technicians maintaining or restoring the iconic Mazda RX-4, providing factory-accurate information. 📋 Manual Details Coverage Areas Coverage Scope: All Models & All Repairs A-Z Original Equipment Manufacturer Level: Dealership Technician Level Page Count Estimated Page Count: 600+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Printed Manual (assumed, for historical accuracy) 📖 Manual Coverage Systems Covered Engine Systems: Rotary engine internal components, apex seals, side seals, rotor housing, eccentric shaft, lubrication system, cooling system, ignition system, fuel system (carbureted), starting system, emission control systems. Transmission Systems: Manual transmission (4-speed, 5-speed), clutch system, driveshaft, differential, axle shafts. Brake Systems: Front disc brakes, rear drum brakes, hydraulic system, parking brake. Suspension Steering: Front independent suspension (struts, control arms), rear leaf spring solid axle, power steering system (if equipped), steering gearbox, tie rods. Electrical Systems: Wiring diagrams, charging system (alternator, regulator), lighting system, instrumentation, ignition switch, fuse box, battery. Body Chassis: Body panel removal/installation, chassis lubrication, door mechanisms, glass, seals, interior trim. Procedures Included Preventative Maintenance: Oil changes, filter replacements, spark plug replacement, coolant flushes, brake fluid changes, lubrication points. Diagnostic Procedures: Troubleshooting engine performance issues, diagnosing electrical faults, identifying brake system problems, suspension alignment checks. Repair Procedures: Engine rebuild (rotary specific), transmission overhaul, brake component replacement, suspension component repair, electrical component repair, bodywork. Tune Up Specifications: Ignition timing, carburetor adjustment, idle speed settings, valve lash (if applicable to rotary design). Technical Depth Depth: Complete mechanical and electrical overhaul, including detailed disassembly, assembly, and torque specifications. Diagnostic Complexity: Advanced diagnostics for rotary-specific issues, including compression testing for rotary engines and troubleshooting oil injection systems. 📊 Manual Specifications File Format Digital Format: N/A (Historically printed) Print Quality Print Quality: High-quality reproductions of original factory print (if digital copy) Binding Type Binding Type: Original: Staple-bound or perfect bound. Modern reproduction: Spiral-bound or perfect bound for durability. Paper Type Paper Type: Durable paper stock suitable for workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Rotary (Wankel) Engine Engine Code Example: 10A (precursor to later RX-4 variants, but indicative of the platform) Rotor Housing Design: Two-rotor configuration Displacement Equivalent Cc: 1146 cc (nominal, based on two 573cc rotors) Performance Horsepower Approx: Approx. 100-110 HP (depending on specific engine variant and tuning) Torque Approx: Approx. 115-125 lb-ft (depending on specific engine variant) Fuel System Fuel Delivery: Single or twin barrel carburetor(s), typically Hitachi or Mikuni. Fuel Type Requirement: Unleaded gasoline (low octane recommended for early rotary engines, but check manual for specific octane rating) Engine Maintenance Apex Seal Material: Early versions used carbon-impregnated seals; later models utilized more robust materials. Manual specifies correct type and replacement procedure. Oil Type Recommendation: Specific rotary engine oil or high-quality mineral/synthetic blend API SF or SG classification (refer to manual for exact specification). 🔧 Transmission Standard Transmission Type: 4-speed Manual Optional Transmission Type Optional: 5-speed Manual, 3-speed Automatic (likely JATCO) Features Clutch Type: Single dry plate, hydraulically actuated Maintenance Transmission Fluid Type: API GL-4 SAE 75W-90 or 80W-90 gear oil (manual for exact specification) Automatic Transmission Fluid Type: Dexron II or equivalent (manual for exact specification) 📐 Dimensions Exterior Body Styles: 2-door Coupe, 4-door Sedan Wheelbase Mm Approx: 2400 mm (94.5 inches) Overall Length Mm Approx: 4160 mm (163.8 inches) Overall Width Mm Approx: 1600 mm (63 inches) Overall Height Mm Approx: 1350 mm (53.1 inches) Weights Curb Weight Kg Approx: 1000 - 1050 kg (2200 - 2315 lbs) Gross Vehicle Weight Kg Approx: 1400 kg (3086 lbs) Tires Wheels Standard Tire Size: 175SR13 or 185/70SR13 (check manual for specific fitments) Wheel Bolt Pattern: 4x110mm (common Mazda pattern for the era) Wheel Size: 13x5.0J or 13x5.5J 🛡️ Safety Features Ratings Crash Test Standards Era: No formal NHTSA/Euro NCAP ratings in the modern sense; safety based on 1970s standards. Active Features Braking System Type: Front disc, rear drum Steering System Type: Recirculating ball (some models may have offered power assist) Passive Features Seat Belts: Lap belts standard, three-point belts likely optional or for front seats. Body Construction: Unit-body construction with integrated safety features of the era. 💡 Technology Features Infotainment Audio System: AM/FM Radio, possibly with cassette player as an option. Instrument Cluster: Speedometer, tachometer (essential for rotary engines), fuel gauge, coolant temperature gauge, oil pressure warning light. Driver Assistance Features...