Chassis Codes:
S102A, S124A
Production Years Covered By Manual:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
Market Positioning:
The Mazda RX-2 (Capella Rotary) was a significant step for Mazda, showcasing their commitment to rotary engine technology in a stylish and sporty compact/intermediate platform, competing with models like the Toyota Corona, Datsun 1600/1800 (Bluebird), and Ford Escort/Cortina.
Competitive Landscape:
Positioned as a more performance-oriented alternative to conventional piston-engined rivals, leveraging the unique characteristics of the Wankel rotary engine. Competed in compact and mid-size segments depending on specific body style and market.
Rotary Engine Appeal:
The primary key feature differentiating the RX-2 was its rotary engine, offering smoother operation, a higher power-to-weight ratio, and a distinctive exhaust note compared to its piston-engine contemporaries.
Design Styling:
Offered in various body styles including sedan, coupe, and wagon, often with attractive styling cues for its era.
Coverage Scope:
Comprehensive workshop service and repair
Estimated Page Count:
High (typical for workshop manuals covering multiple model years and variants, estimated 500-1500 pages for a complete set)
Manual Type:
Workshop Service Manual / Repair Manual
Language:
English (presumed, based on common availability for export markets)
Engine Systems:
Rotary (12A) engine theory, disassembly, assembly, tuning, cooling, lubrication, ignition, fuel delivery (carburetor), emissions control
Drivetrain Systems:
Manual transmission (type R1, R3, R4), clutch, driveshafts, differential, axle components
Suspension And Steering:
Front independent suspension (struts), rear leaf springs, power steering system (if equipped), steering gearbox, wheel alignment specifications
Braking Systems:
Front disc brakes, rear drum brakes, hydraulic system, brake fluid specifications, bleeding procedures, parking brake
Electrical Systems:
Wiring diagrams, charging system (alternator), starting system (starter motor), lighting, gauges, accessories, fuses, relays, ignition system components
Body And Chassis:
Body panel repair, interior trim, glass replacement, door mechanisms, seat adjustments, chassis structural components
Heating And Air Conditioning:
HVAC system components, refrigerant types (R12), service procedures (if applicable to specific trims)
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement (if applicable), coolant checks, lubrication points, brake fluid flush
Major Repairs:
Engine rebuilds (rotary apex seal replacement, rotor housing inspection), transmission overhaul, clutch replacement, suspension component renewal, brake caliper rebuild
Troubleshooting:
Diagnostic charts, common fault identification, specific component testing procedures
Diagnostics:
Electrical system diagnostics, mechanical component testing, vacuum leak detection
Specifications:
Torque specifications, clearances, fluid capacities, engine timing, component measurements
Depth Of Coverage:
Highly detailed, suitable for professional mechanics and experienced DIY enthusiasts, covering from basic adjustments to complete engine and transmission overhauls.
Engine Type:
Rotary (Wankel)
Engine Displacement Equivalent:
1146 cc (1.1 L) for the 12A engine
Engine Code:
12A (SA22C series also used variations)
Rotor Design:
Two-rotor, side-port induction (typical)
Horsepower Range:
Approximately 90-110 HP (SAE Gross) depending on emission controls and carburetor setup.
Torque Range:
Approximately 95-105 lb-ft (SAE Gross).
Fuel Delivery:
Two-barrel downdraft carburetor (e.g., Hitachi or Solex variants). Later models may feature fuel injection in some markets, though less common for the RX-2 specifically.
Fuel Type:
Unleaded gasoline (premium recommended for optimal performance and engine longevity).
Cooling Type:
Water-cooled, pressurized system.
Oil Capacity:
Approximately 5.3 US quarts (5.0 Liters) including filter, with separate oil metering for apex seals (pre-mix or injection).
Apex Seal Lubrication:
Requires metered oil injection from a separate reservoir, or pre-mix in fuel for optimal apex seal lubrication.
Transmission Type Standard:
4-speed manual transmission (e.g., Type R1, R3).
Transmission Type Optional:
3-speed automatic transmission (e.g., Toyoglide or similar derivative).
Gear Ratios:
Varies by transmission type; detailed ratios will be in the manual.
Transmission Fluid Type Manual:
GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90).
Transmission Fluid Type Automatic:
Dexron II or equivalent (check specific manual for exact specification).
Wheelbase:
Approximately 97.6 inches (2480 mm) for sedan/coupe.
Length:
Approximately 165.4 inches (4200 mm) for sedan/coupe.
Width:
Approximately 64.4 inches (1635 mm) for sedan/coupe.
Height:
Approximately 53.5 inches (1360 mm) for coupe, 54.7 inches (1390 mm) for sedan.
Curb Weight:
Approximately 2100-2400 lbs (950-1090 kg) depending on body style and equipment.
Gross Vehicle Weight Rating:
Refer to vehicle VIN plate or manual for specific rating.
Wheel Bolt Pattern:
4x110 mm (common for early Mazda rotarys).
Standard Tire Size:
Typically 165SR13 or 175/70SR13.
Crash Test Data:
Limited official crash test data available for this era and model. Emphasis on passive safety features of the time.
Braking System:
Front disc brakes and rear drum brakes provided adequate stopping power for the era. Power assist was optional or standard on higher trims.
Seat Belts:
Lap belts or three-point front seat belts (depending on market and year). Lap belts typically for rear passengers.
Body Construction:
Unitized body construction, with crumple zones designed to absorb impact energy as understood at the time.
Engine Oil Change:
Every 3,000-5,000 miles (5,000-8,000 km) or 3-6 months, especially given rotary engine oil consumption and operating characteristics. Refer to manual for specific recommendation.
Air Filter Replacement:
Every 15,000-30,000 miles (25,000-50,000 km), or more frequently in dusty conditions.
Spark Plug Replacement:
Due to the unique nature of rotary ignition, spark plugs (often dual ignition) require regular inspection and replacement, typically every 15,000-20,000 miles (25,000-30,000 km). The manual will specify the correct type and gap.
Coolant Flush:
Every 24,000 miles (40,000 km) or 2 years.
Engine Oil Type:
API SF or SG service classification. Viscosity grade typically SAE 10W-30 or 10W-40. Crucially, it will require oil for the separate apex seal lubrication system.
Coolant Type:
Ethylene glycol-based antifreeze. Mixture of 50/50 antifreeze and distilled water. Check manual for exact coolant type and capacity.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Apex Seal Wear:
The most common issue with rotary engines is apex seal wear. Symptoms include loss of compression, rough running, increased oil consumption, and difficult starting. Regular oil metering and proper engine warm-up are crucial.
Carbon Buildup:
Carbon deposits can form in the combustion chambers and exhaust ports, requiring occasional cleaning or de-carbonizing procedures.
Cooling System Reliability:
Rotary engines can run hotter than piston engines. Overheating can accelerate wear, so maintaining the cooling system (radiator, hoses, thermostat, fan) is paramount.
Carburetor Tuning:
Carburetors require precise adjustment for optimal performance and emissions. Vacuum leaks can also be a common problem.
Mazda Rotary Legacy:
Mazda's pioneering work with the Wankel rotary engine began with the Cosmo Sport 110S and continued with models like the RX-2, RX-3, RX-4, and later the RX-7, establishing a unique niche in automotive performance.
Rotary Lineup Context:
The RX-2 (often called Capella Rotary in Japan) was introduced in 1970 as part of the Mazda Capella (Mazda 616/818 in export markets) line, offering a rotary engine option that distinguished it from its piston-powered siblings.
Production Period:
1970-1978
Manufacturing Locations:
Japan (Mazda factories)
