🏷️ Basic Information Identification Make: Mazda Model: RX4 Model Codename: S124A (Sedan/Coupe), LA2VS (Wagon) Codes Chassis Codes: S124A, LA2VS 👋 Introduction Market Position Target Audience: Owners and mechanics of Mazda RX4 vehicles seeking in-depth repair and maintenance knowledge. Competitive Analysis Manual Value: Provides essential technical data often unavailable in owner's manuals, crucial for maintaining rotary engines. Key Features Comprehensiveness: Focuses specifically on the engine service and repair, offering detailed procedures for the unique rotary powerplant. 📋 Manual Details Coverage Areas Engine: Rotary (12A) Fuel System: Carburetor and Injection (depending on market/variant) Ignition System: Electronic Cooling System: Water-cooled Lubrication System: Wet sump Page Count Estimated Pages: 300-500 (typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Disassembly, inspection, assembly, timing, seals, gaskets, rotor housings, apex seals, eccentric shaft, oil pump, water pump, intake manifold, exhaust manifold. Fuel And Emission Control: Carburetor adjustment and overhaul (e.g., Hitachi, Mikuni), fuel pump, fuel filter, emissions control systems (e.g., EGR, thermal reactor). Ignition System: Distributor, ignition coils, spark plugs, wiring, timing adjustments, electronic control unit (ECU) if applicable. Cooling System: Radiator, coolant hoses, thermostat, water pump, fan, coolant specifications. Lubrication System: Engine oil, oil filter, oil pan, oil pump, oil cooler, oil specifications. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, coolant flushes, lubrication points. Troubleshooting: Diagnosis of common engine problems, electrical issues, starting problems, performance issues, diagnostic charts. Repair And Overhaul: Detailed step-by-step instructions for engine rebuilds, component replacement (e.g., seals, bearings, ignition components), carburetor overhauls. Specifications And Tolerances: Torque values, clearances, measurements, rebuild specifications for critical engine components. Technical Depth Depth: Comprehensive engine rebuild and diagnostic procedures, including internal component specifications and tolerances. Suitable for professional mechanics and experienced DIY enthusiasts. 📊 Manual Specifications File Format Quality: High-resolution, searchable PDF with clear diagrams and text. Print Quality Scalability: Optimized for printing, with sharp lines and legible text for diagrams. Binding Type Digital Format Advantage: Instant download, easily accessible on multiple devices, printable pages. Paper Type Digital Equivalent: No physical paper; delivered as a digital file. ⚙️ Engine Specifications Primary Engine Engine Type: Mazda 13B Rotary (Wankel) Engine Code: 12A Rotor Displacement: 654 cc per rotor (total 1308 cc equivalent displacement) Rotor Housing Material: Cast iron or similar durable alloy Apex Seal Material: Historically, carbon or phenolic resin, later variations used metal composites. Performance Horsepower Range: Approximately 100-135 hp (depending on market and emission controls) Torque Range: Approximately 110-130 lb-ft Fuel System Carburetion: Twin-choke downdraft carburetors (e.g., Hitachi SH20, Mikuni PHH) Fuel Type: Unleaded gasoline (91 RON or higher recommended) Ignition System Ignition Timing: Typically specified in degrees Before Top Dead Center (BTDC), adjustable via distributor. Cooling System Coolant Type: Ethylene glycol based antifreeze/coolant mixture (50/50 recommended). Lubrication System Oil Capacity: Approximately 5.5-6.0 quarts (5.2-5.7 liters) with filter change. Oil Viscosity Recommendation: API SG or higher, SAE 10W-30 or 10W-40 commonly recommended for varying temperatures. Other Emissions Control Systems: Thermal reactor, EGR (Exhaust Gas Recirculation), air injection (depending on market and year). 🔧 Transmission Standard Transmission Type: 4-speed Manual Optional Transmission Type: 3-speed Automatic (TorqueFlite based or Mazda's own design) Features Gear Ratios Manual: Specific ratios for 1st, 2nd, 3rd, 4th, and Reverse gears would be detailed in the manual. Automatic Transmission Fluid Type: Dexron II or equivalent automatic transmission fluid (ATF). 📐 Dimensions Exterior Length: Sedan/Coupe: ~4250 mm (167.3 in) Width: Sedan/Coupe: ~1600 mm (63.0 in) Height: Sedan/Coupe: ~1375 mm (54.1 in) Weights Curb Weight: Approximately 1150-1250 kg (2535-2755 lbs) 🛡️ Safety Features Ratings Crash Test Data: Limited comprehensive modern crash test data available due to era of production. Active Features Brakes: Front disc brakes, rear drum brakes. Power assist typically standard. Passive Features Seatbelts: Front lap and shoulder belts. Rear lap belts. 💡 Technology Features Infotainment Entertainment System: Basic AM/FM radio, optional cassette player. Driver Assistance Features: No electronic driver assistance features typical of modern vehicles. Connectivity Features: No integrated connectivity features. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 miles (4,800-8,000 km) or 3-6 months, whichever comes first. Spark Plug Inspection Replacement: Inspect every 15,000 miles (24,000 km), replace as needed. Rotary spark plugs are critical. Air Filter Replacement: Inspect every 7,500 miles (12,000 km), replace as needed or annually. Coolant Flush Interval: Every 2 years or 30,000 miles (48,000 km). Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Manual Transmission Fluid: API GL-4 gear oil, SAE 75W-90 or 80W-90 (capacity approx. 1.8-2.0 liters). Known Issues Apex Seal Wear: Common issue with high-mileage rotary engines, leading to loss of compression, poor starting, and rough running. Requires engine rebuild. Carburetor Issues: Deterioration of rubber components, vacuum leaks, and tuning challenges common with older carburetors. Oil Consumption: Rotary engines inherently consume some oil for lubrication; the manual...