Model Codes:
S102A, S124A, S124A (Station Wagon), S132A (Coupe), S132A (Sedan)
Production Years Covered:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
Market Segment:
Compact sports car, affordable performance, enthusiast vehicle.
Key Competitors:
Datsun 240Z, Toyota Corolla GT, Ford Escort Twin Cam, Opel GT.
Unique Selling Proposition:
Rotary engine technology offering smooth operation and unique performance characteristics for its class.
Body Styles:
Coupe, Sedan, Station Wagon.
Target Audience:
DIY mechanics, professional repair shops, Mazda enthusiasts, restorers.
Primary Coverage:
Complete workshop service and repair for Mazda RX3 models 1970-1978.
Estimated Page Count:
Likely 500+ pages (typical for comprehensive workshop manuals of this era).
Type:
Workshop Service Repair Manual
Language:
English (Assumed based on common market availability for this model range).
Format:
Digital (PDF/Scanned) or Printed (Likely a reproduction of original factory manual).
Engine:
Rotary engine theory, disassembly, assembly, diagnosis, troubleshooting, lubrication system, cooling system, ignition system, fuel system (carburetion and early injection for later models).
Transmission:
Manual transmission (4-speed and 5-speed), automatic transmission (TorqueFlite variants), clutch system, driveline, propeller shaft, differentials.
Chassis:
Front suspension (independent, strut-based), rear suspension (live axle, leaf springs or coil springs depending on variant), steering system (manual and power assist), braking system (front discs, rear drums), wheel alignment specifications.
Electrical:
Wiring diagrams, charging system (alternator, battery), starting system, lighting system, instrumentation, horn, radio, wipers, power windows (if equipped), fuse and relay locations.
Bodywork:
Body panel removal and installation, door mechanisms, glass replacement, interior trim, seat removal and installation, bumper removal, body repair techniques (limited to manual scope).
Maintenance:
Routine maintenance checks (fluid levels, tire pressure), oil change intervals and specifications, filter replacements, tune-up procedures, spark plug gap and replacement, belt adjustment and replacement.
Repair:
Component disassembly, cleaning, inspection, repair, and reassembly for all major systems. Includes detailed torque specifications and tolerances.
Troubleshooting:
Diagnostic charts and procedures for common drivability issues, electrical faults, and mechanical problems specific to the RX3 and its rotary engine.
Diagnostics:
Specific diagnostic steps for rotary engine apex seal wear, lubrication issues, ignition timing, and carburetion problems.
Depth:
Comprehensive. Covers everything from basic maintenance to complete engine rebuilds, transmission overhauls, and detailed electrical system diagnosis.
Digital Format:
PDF (Searchable text and image-based pages are common for digitized manuals).
Print Quality:
High-resolution scans, ensuring clarity of text, diagrams, and illustrations for readability.
Binding Type:
Not Applicable (for digital). For printed reproductions, typically bound for durability (e.g., spiral-bound, perfect bound).
Paper Type:
Not Applicable (for digital). For printed reproductions, typically on durable, often glossy paper to showcase illustrations.
Engine Type:
Mazda Rotary (Wankel)
Engine Displacement Cc:
1146 cc (for 12A engine)
Horsepower Gross Approx:
90-110 hp (depending on model year and emissions equipment)
Torque Gross Approx Lb-Ft:
100-115 lb-ft (depending on model year and emissions equipment)
Carburetion:
Single or Twin Hitachi downdraft carburetors (e.g., Hitachi HJG 36-48)
Fuel Type:
Unleaded gasoline (later models may have specifications for unleaded)
Cooling Type:
Liquid-cooled, pressurized system with thermostat and fan.
Oil Capacity Quarts:
Approx. 5.3 US quarts (including filter) - Consult manual for exact spec.
Ignition System:
Distributor-based, single ignition coil (dual ignition systems may exist on later models or performance variants).
Transmission Type:
4-speed manual
Transmission Type Optional:
5-speed manual (later models), 3-speed automatic (Chrysler Torqueflite derived, e.g., A413)
Clutch Type:
Dry single-plate clutch
Manual Transmission Fluid:
GL-4 gear oil (e.g., SAE 75W-90 or 80W-90 - consult manual for specific viscosity and type)
Automatic Transmission Fluid:
Dexron II or equivalent ATF (consult manual for exact specification)
Length Mm:
Approx. 4030-4050 mm (Coupe/Sedan)
Width Mm:
Approx. 1570-1600 mm
Height Mm:
Approx. 1320-1360 mm
Wheelbase Mm:
Approx. 2300-2310 mm
Curb Weight Kg Approx:
900-1050 kg (depending on body style and equipment)
Wheel Size:
13-inch or 14-inch alloy or steel wheels
Tire Size Common:
155SR13, 165/70SR13, 175/70SR13 (consult manual for precise fitments)
Crash Test Ratings:
No formal US NHTSA or Euro NCAP ratings available for this era of vehicle.
Brakes:
Front disc brakes, rear drum brakes. Power assist typically optional or standard on higher trims.
Seat Belts:
Lap and shoulder belts (front), lap belts (rear).
Steering Column:
Collapsible steering column (late 70s safety feature).
Audio System:
Factory AM/FM radio, possibly with an 8-track player or cassette adapter on later models. Aftermarket upgrades are common.
Instrumentation:
Tachometer, speedometer, fuel gauge, temperature gauge, oil pressure (sometimes combined with temp or warning light), voltmeter/ammeter.
Features:
Primarily focused on basic mechanical operation; no electronic driver assistance systems typical of modern vehicles.
Oil Change Interval Miles Km:
Every 3,000-5,000 miles (5,000-8,000 km) or 6 months - Consult manual for precise intervals and oil type.
Spark Plug Replacement Miles Km:
Typically 12,000-15,000 miles (20,000-25,000 km) - Specific plug type and gap are critical.
Coolant Type:
Ethylene glycol based coolant (e.g., 50/50 mix with distilled water) - Consult manual for specific type and capacity.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (consult manual for exact specification)
Engine Apex Seals:
Wear and potential failure of apex seals is a known characteristic of rotary engines if not properly maintained or if overheated. Crucial to maintain oil levels and cooling system.
Carburetor Issues:
Carburetors (Hitachi) can be sensitive to gumming and require regular cleaning and adjustment, especially with fuel degradation over time.
Cooling System:
Aging radiator hoses, water pumps, and potential for coolant leaks can lead to overheating if not addressed.
Oil Filter Part Number Example:
e.g., Wix 51515, Fram PH8172 (Note: Always verify with parts catalog or manual for specific fitment)
Rotary Pioneering:
Mazda's commitment to rotary engine technology began with the Cosmo and was popularized globally with the RX series.
Generation Timeline:
The RX3 (codenamed '808' in some markets) was introduced as a successor to the R100, offering a more conventional chassis and body style while retaining the rotary engine.
Facelifts Updates:
Minor styling updates and mechanical revisions occurred throughout its production run, including grille changes, lighting updates, and emissions control implementations.
Manufacturing Location:
Japan
Production Volume Estimate:
Significant global sales, particularly popular in Japan, Australia, and North America.
Performance Awards:
While not a traditional award winner, the RX3 was recognized for its sporting credentials and unique rotary powerplant, contributing to Mazda's performance image.
Enthusiast Ratings:
Highly regarded by rotary engine enthusiasts for its classic styling, handling, and the distinct driving experience provided by the Wankel engine.
