Positioning:
The Mazda RX-3 was positioned as a sporty, compact performance car with a unique rotary engine, competing with models like the Toyota Corolla Levin/Sprinter Trueno and Datsun (Nissan) Sunny coupes.
Rivals:
Toyota Corolla Levin/Sprinter Trueno, Datsun (Nissan) Sunny, Honda Civic RS, Mitsubishi Galant FTO.
Rotary Engine:
The distinctive 12A Wankel rotary engine provided a smooth power delivery and high-revving character, differentiating it from piston-engined competitors.
Styling:
Sleek coupe and sporty sedan/wagon variants offered attractive styling for the era, often drawing comparisons to European sports cars.
Model Years Covered:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
Region Coverage:
Global (primarily North America and Japan)
Estimated Pages:
Approximately 800-1200 (typical for comprehensive factory manuals of this era)
Type:
Factory Service Manual / Repair Manual
Engine Mechanical:
Rotary engine (12A) disassembly, assembly, inspection, overhaul, lubrication, cooling system, fuel system (carburetor, ignition)
Engine Performance:
Engine tuning, emissions control systems, troubleshooting diagnostic charts for engine performance issues
Transmission Manual:
Manual transmission (4-speed, 5-speed) disassembly, inspection, repair, clutch system
Transmission Automatic:
Automatic transmission (if applicable) disassembly, inspection, repair, fluid specifications
Drivetrain:
Driveshaft, differential, axles, universal joints
Suspension:
Front and rear suspension systems, shock absorbers, springs, control arms, bushings, alignment specifications
Steering:
Steering gear, linkages, power steering system (if equipped)
Brakes:
Front and rear brake systems (disc and drum), hydraulic system, parking brake, troubleshooting
Electrical System:
Battery, charging system (alternator), starting system, ignition system, lighting, gauges, wiring diagrams
Body And Frame:
Body panel removal and installation, glass, doors, interior trim, chassis lubrication points
HVAC:
Heating, ventilation, and air conditioning system (if equipped)
Maintenance:
Routine inspections, fluid changes, filter replacements, spark plug replacement, belt adjustments
Diagnostics:
Troubleshooting guides for common symptoms, diagnostic charts, fault codes (if applicable)
Repair:
Step-by-step instructions for component replacement and repair across all major systems
Overhaul:
Complete engine and transmission overhaul procedures
Adjustments:
Carburetor adjustments, ignition timing, valve clearance (if applicable to rotary apex seals), brake adjustments
Torque Specifications:
Detailed torque specifications for all critical fasteners
Depth:
Comprehensive: Covers everything from basic maintenance to full engine rebuilds and advanced diagnostics.
Target Audience:
Professional mechanics, experienced DIY enthusiasts, and restoration specialists.
PDF Quality:
High-resolution scans with searchable text where OCR has been applied, ensuring clarity for diagrams and text.
File Organization:
Typically organized by system or chapter for easy navigation.
Printability:
Designed for clear printing of all diagrams, tables, and text.
Binding Original:
Often a sturdy, spiral-bound or case-bound format for shop use.
Paper Type Original:
Durable, often glossy or semi-gloss paper to withstand workshop environments and highlight diagrams.
Engine Type:
Mazda Wankel Rotary
Displacement:
1146 cc (equivalent) / 2 x 573 cc rotors
Horsepower Range:
Approximately 90-110 hp (net) depending on year and emissions controls
Torque Range:
Approximately 100-115 lb-ft (net)
Fuel Delivery:
Nikki or Hitachi downdraft carburetors (single or twin barrel variants)
Fuel Type:
Unleaded gasoline (as emissions regulations evolved)
Ignition Type:
Distributor-based, points or electronic ignition (later models)
Rotor Housing:
Epitrochoidal shape
Apex Seals:
Critical wear item requiring specific lubrication and maintenance
Oil System:
Separate oil injection system or premixing required for rotor lubrication.
Wheelbase Coupe:
Approx. 2400 mm (94.5 in)
Length Coupe:
Approx. 4000-4100 mm (157-161 in)
Width Coupe:
Approx. 1600 mm (63 in)
Height Coupe:
Approx. 1300 mm (51 in)
Curb Weight:
Approx. 950-1100 kg (2094-2425 lbs) depending on body style and equipment
Gross Vehicle Weight Rating:
Varies by model, typically around 1300-1400 kg
Wheel Bolt Pattern:
4x110 mm
Stock Tire Sizes:
Commonly 165/80R13, 175/70R13, or 185/70R13
Crash Test Data:
Limited formal crash test data available for this era from sources like NHTSA or Euro NCAP. Vehicles of this period generally had less advanced safety features compared to modern standards.
Braking System:
Front disc brakes, rear drum brakes. Some higher trims or later models might have offered 4-wheel disc brakes as an option.
Seatbelts:
Lap belts standard, shoulder belts may have been optional or standard on later models/trims.
Construction:
Unibody construction with integrated safety cage elements typical of the era.
Oil Change:
Typically every 3,000-5,000 miles (5,000-8,000 km) or 3-6 months. Rotary engines often require frequent oil changes.
Air Filter Replacement:
Every 15,000-30,000 miles (24,000-48,000 km) or as needed based on driving conditions.
Spark Plug Replacement:
Due to the rotary engine's design, specific platinum or copper plugs are required. Interval varies, typically 20,000-30,000 miles. Manual will specify exact type and gap.
Engine Oil Type:
API SF or SG, SAE 10W-30 or 10W-40 recommended by Mazda for the 12A engine. Use of specific synthetic oils may be beneficial for rotary engines but check manual for compatibility.
Engine Oil Capacity:
Approx. 4-5 liters (4.2-5.3 US quarts) including filter. Crucial to verify with manual.
Transmission Fluid Manual:
API GL-4 gear oil, SAE 75W-90 or 80W-90. Capacity approx. 1.8-2.2 liters.
Differential Fluid:
API GL-5 gear oil, SAE 80W-90. Capacity approx. 1.1 liters.
Coolant:
Ethylene glycol based antifreeze, 50/50 mix with distilled water. Capacity approx. 7-8 liters.
Apex Seal Wear:
The most common issue with the 12A rotary is apex seal wear, leading to loss of compression, poor starting, and decreased performance. Regular oil changes and proper engine warm-up/cool-down are crucial.
Carburetor Issues:
Carburetors can require frequent adjustment and rebuilding due to age and potential vacuum leaks.
Ignition System Reliability:
Points-based ignition systems can be prone to wear and require regular maintenance. Electronic ignition conversions are a popular upgrade.
Chassis Rust:
Like many cars of this era, rust can be a significant issue, especially in areas exposed to salt and moisture.
Mazda Rotary Pioneering:
Mazda's commitment to the Wankel rotary engine, starting with the Cosmo and R100, established its unique identity in the automotive world.
First Generation:
Introduced in Japan in 1972, the RX-3 (often designated Savanna in Japan) was developed to fill a gap in Mazda's sporty coupe lineup, following the success of the R100. It was based on the Mazda Grand Familia platform.
Facelifts Updates:
Received minor styling updates and technical revisions throughout its production run, including engine tuning for emissions compliance and introduction of 5-speed transmissions.
Production Years:
1971 (Japan as Savanna) - 1978
Manufacturing Locations:
Japan
Cultural Impact:
Became a cult classic among JDM enthusiasts and rotary engine aficionados for its performance, unique engine, and distinctive styling.
