Positioning:
The Mazda RX-3 was a significant model for Mazda, showcasing their commitment to rotary engine technology. It competed in a segment with sporty coupes and sedans, offering unique performance characteristics for its time.
Competitors:
Competed against models like the Datsun 240Z/260Z, Toyota Celica, Ford Capri, and various European sports coupes of the era.
Rotary Engine:
The primary distinguishing feature is the Wankel rotary engine, known for its smooth operation, high RPM capability, and compact size.
Styling:
Offered in attractive coupe, sedan, and wagon body styles, often featuring sporty design cues.
Handling:
Generally praised for its good handling dynamics, contributing to its sporty image.
Diy Savings:
Enables owners to perform their own maintenance and repairs, saving significant costs compared to dealership or independent mechanic services.
Ease Of Use:
Designed with step-by-step instructions and illustrations to make complex procedures more accessible for enthusiasts and DIY mechanics.
Model Years Covered:
1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
Body Styles Covered:
Coupe, Sedan, Wagon
Trim Levels Covered:
All trim levels
Engine Variants Covered:
All 12A rotary engine variants
Transmission Types Covered:
Manual (4-speed, 5-speed), Automatic
Estimated Page Count:
High volume, likely over 1000 pages (estimated based on 'complete workshop service repair manual' description)
Type:
Complete Workshop Service Repair Manual
Format:
Downloadable Digital File (PDF)
Engine:
12A Rotary Engine: Theory of operation, disassembly, assembly, inspection, troubleshooting, overhaul, lubrication system, cooling system.
Fuel System:
Carburetor (e.g., Hitachi/Keihin, Mikuni) tuning, fuel pump, fuel lines, fuel tank, emissions control systems.
Ignition System:
Distributor, ignition coils, spark plugs, timing adjustments, troubleshooting.
Transmission:
Manual (4-speed, 5-speed) and Automatic transmissions: Overhaul, repair, fluid specifications, shifting mechanisms.
Drivetrain:
Clutch system, driveshaft, rear axle assembly, differential.
Suspension:
Front suspension (independent, MacPherson struts), Rear suspension (leaf springs, solid axle), shock absorbers, springs, bushings, alignment specifications.
Steering:
Steering gear, steering column, tie rods, troubleshooting.
Brakes:
Front disc brakes, rear drum brakes: brake pads, rotors, calipers, wheel cylinders, brake lines, master cylinder, parking brake, bleeding procedures.
Electrical System:
Wiring diagrams, charging system (alternator, regulator), starting system (starter motor), lighting system, dashboard instruments, fuses, relays, battery.
Body And Chassis:
Body panel removal/installation, door mechanisms, glass, interior trim, seats, bumpers, frame structure, rust repair considerations.
Heating And Air Conditioning:
HVAC system components, blower motor, heater core, A/C system (if equipped), refrigerant handling (early R-12 systems).
Maintenance:
Scheduled maintenance (oil changes, filter replacements, spark plug checks, fluid top-offs), lubrication points, cleaning procedures.
Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon problems across all systems, symptom-based diagnostics.
Repair:
Detailed repair instructions for component removal, disassembly, cleaning, inspection, part replacement, reassembly, and adjustment.
Overhaul:
Comprehensive instructions for complete engine and transmission rebuilds.
Installation:
Instructions for installing replacement parts and accessories.
Specifications:
Torque specifications, clearances, tolerances, fluid capacities, pressures, and electrical values.
Depth:
Comprehensive (A-Z): Covers everything from basic maintenance and routine service to complete engine and transmission rebuilds, complex electrical diagnostics, and bodywork repairs.
Engine Type:
Wankel Rotary
Displacement:
1146 cc (equivalent to approximately 2.3 liters in conventional piston engine terms due to a different displacement calculation method for rotaries)
Horsepower:
Approximately 90-100 hp (depending on variant and market, e.g., US-spec might have lower output due to emissions).
Torque:
Approximately 110-120 lb-ft (depending on variant).
Redline:
Typically around 6000-7000 RPM.
Carburetion:
Single or dual downdraft or side-draft carburetors (e.g., Hitachi, Mikuni). Early models may have used simpler carburetion.
Fuel Type:
Unleaded gasoline (or leaded in early years, requiring appropriate additives if using vintage fuel).
Oil System:
The 12A rotary engine requires oil injection to lubricate apex seals and oil seals. Early systems were often 'pre-mix' or separate oil injection systems, later models had integrated systems.
Crash Testing:
No comprehensive crash test data from modern agencies (like NHTSA/IIHS) is available for this era of vehicle. Safety features were basic by today's standards.
Braking:
Front disc brakes, rear drum brakes. ABS was not available.
Steering:
Recirculating ball steering, power steering was typically optional or unavailable on base models.
Seatbelts:
Lap belts or lap and shoulder belts depending on the year and market. The manual will detail their operation and maintenance.
Airbags:
Not equipped with airbags.
Body Structure:
Body-on-frame construction in early phases, evolving towards unibody construction. Safety implications are based on contemporary engineering standards.
Oil Change Interval:
Typically every 3,000-5,000 miles (5,000-8,000 km) or 6 months, but the manual will specify exact intervals and conditions.
Spark Plug Replacement:
Intervals will vary based on plug type; the manual will provide specific recommendations for the 12A engine.
Rotor Housing Apex Seal Inspection:
While not a routine interval, the manual will cover symptoms and diagnostic procedures for apex seal wear and potential rebuild requirements.
Engine Oil:
The manual will specify API service classification and viscosity grade (e.g., SAE 20W-50, SAE 10W-40). Rotary engines often benefited from specific oil formulations for seal lubrication.
Coolant:
Standard ethylene glycol-based coolant mixture. Capacity and change intervals will be detailed.
Transmission Fluid Manual:
API GL-4 gear oil, viscosity grade to be specified (e.g., 75W-90).
Transmission Fluid Automatic:
Dexron II (or equivalent) automatic transmission fluid. Capacity and change intervals will be detailed.
Brake Fluid:
DOT 3 or DOT 4 brake fluid, depending on original specification. Regular flushing is recommended.
Differential Fluid:
API GL-5 gear oil, viscosity grade to be specified (e.g., 80W-90).
Apex Seal Wear:
A common issue with rotary engines of this era is apex seal wear, leading to loss of compression, poor performance, and increased oil consumption. The manual provides diagnosis and rebuild procedures.
Carburetor Issues:
Carburetors can become gummed up with age, leading to rough idling or starting problems. Rebuild and tuning instructions are essential.
Oil Consumption:
Rotary engines inherently consume some oil for lubrication. Excessive consumption often indicates seal wear. The manual covers normal vs. abnormal consumption.
Cooling System:
Aging cooling system components (hoses, radiator, water pump seals) can lead to leaks or overheating. Maintenance and replacement procedures are covered.
Electrical Gremlins:
Older wiring harnesses can degrade, leading to intermittent electrical faults. The detailed wiring diagrams in the manual are crucial for troubleshooting.
