🏷️ Basic Information

Make:

Mazda

Model:

RX-2 / RX-3

Common Name:

Mazda Familia Rotary / Mazda Savanna Rotary

Applicable Years:

1970-1978

Chassis Code Rx2:

S102A, S124A, S132A

Chassis Code Rx3:

S124A, S132A, S133A, S134A

👋 Introduction

Positioning:

The Mazda RX-2 and RX-3 were significant models in Mazda's early history, establishing their reputation for rotary-powered vehicles. They competed in the compact and subcompact segments with a focus on performance and unique engineering.

Competitors:

Ford Escort, Toyota Corolla, Datsun 510, Honda Civic, Mitsubishi Lancer.

Engine Technology:

The primary differentiator was the Wankel rotary engine, offering a smooth, high-revving power delivery.

Design Philosophy:

Sporty styling, lightweight construction, and a focus on driver engagement.

Value:

Essential for owners and mechanics looking to maintain, repair, or restore these classic rotary Mazdas. Provides factory-accurate procedures and specifications.

📋 Manual Details

Manual Type:

Factory Workshop Service Manual (WSM)

Primary Language:

English (translated from original Japanese)

Format:

PDF Download

Estimated Pages:

High (Typically 500-1000+ pages for factory WSMs of this era, exact count varies by specific revision)

📖 Manual Coverage

Engine:

Rotary (12A, 13B) - detailed disassembly, assembly, lubrication, cooling, ignition, fuel, emissions control, rotary specific component theory

Transmission:

Manual (4-speed, 5-speed) and Automatic - overhaul, adjustments, fluid specifications, clutch system

Drivetrain:

Rear-wheel drive, driveshaft, differential, axles

Suspension:

Front (MacPherson strut), Rear (Live axle with leaf springs or coil springs) - component replacement, alignment specifications, shock absorber and spring service

Steering:

Manual and Power Steering systems - components, adjustments, overhaul

Brakes:

Front Disc, Rear Drum - hydraulic system, calipers, master cylinder, brake lines, parking brake

Electrical:

Charging system, ignition system, lighting, starting system, instruments, wiring diagrams, fuse/relay locations

Fuel System:

Fuel tank, pump, lines, carburetor (single barrel and twin barrel Zenith Stromberg or Hitachi variations) service

Exhaust System:

Mufflers, pipes, catalytic converter (later models) where applicable

Body:

Body construction, doors, windows, trim, interior components, seat adjustment, panel gaps

Chassis:

Frame construction, mounting points, corrosion protection

Maintenance:

Oil changes, filter replacements, spark plug service, lubrication points, battery maintenance, coolant checks

Troubleshooting:

Diagnostic flowcharts for common symptoms, engine performance issues, electrical faults

Repair:

Component replacement (engine, transmission, brakes, suspension), gasket and seal replacement, body panel repair

Overhaul:

Complete engine rebuild, transmission rebuild, carburetor overhaul, brake caliper and master cylinder rebuild

Adjustments:

Carburetor idle speed and mixture, ignition timing, valve clearance (if applicable, though rotary engines don't have traditional valves), clutch pedal, brake adjustments

Torque Specifications:

Detailed torque values for all critical fasteners and engine components

Depth:

Comprehensive factory-level detail, covering routine maintenance to full engine and drivetrain rebuilds.

Diagnostic Capabilities:

Includes diagnostic procedures and specifications for identifying and resolving mechanical and electrical issues.

📊 Manual Specifications

File Type:

PDF

Searchable Text:

Likely, depending on the OCR quality of the original scan.

Quality:

Variable (dependent on the scan quality of the original document).

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Type:

Wankel Rotary

Displacement Liter:

1.1 L (12A) for RX-2, 1.1 L (12A) and 1.3 L (13B) for RX-3

Horsepower 12A:

Approx. 110-130 hp (depending on variant and emissions controls)

Torque 12A:

Approx. 110-130 lb-ft (depending on variant)

Horsepower 13B:

Approx. 135-145 hp (depending on variant)

Torque 13B:

Approx. 130-150 lb-ft (depending on variant)

Carburetion:

Single-barrel or twin-barrel Zenith Stromberg, Hitachi, or Mikuni carburetors.

Fuel Type:

Unleaded Gasoline (Octane rating as specified by Mazda, typically high)

Type:

Water-cooled, with a dedicated rotary engine cooling system design (often with multiple thermostats).

Oil System:

Rotary engines require a specific oil injection system (REI) for apex seals, in addition to the sump oil.

Rotor Housing Material:

Chrome-plated housing or cast iron with special coatings.

Apex Seals:

Critical wear item, manual covers inspection and replacement procedures.

🔧 Transmission

Type Rx2:

4-speed manual

Type Rx3:

4-speed manual, 5-speed manual

Type Rx2:

3-speed automatic

Type Rx3:

3-speed automatic

Fluid Type:

API GL-4 gear oil (specific viscosity to be confirmed in manual, likely 75W-90 or 80W-90)

Type:

Dry single-plate, hydraulically operated

📐 Dimensions

Rx2 Length Mm:

Approx. 4,000 - 4,100 mm

Rx2 Width Mm:

Approx. 1,550 - 1,600 mm

Rx2 Height Mm:

Approx. 1,350 - 1,400 mm

Rx3 Length Mm:

Approx. 3,900 - 4,050 mm

Rx3 Width Mm:

Approx. 1,560 - 1,600 mm

Rx3 Height Mm:

Approx. 1,340 - 1,380 mm

Rx2:

Approx. 2,400 mm

Rx3:

Approx. 2,320 - 2,360 mm

Curb Weight Kg:

Approx. 950 - 1,100 kg (varies by model and specification)

Gross Vehicle Weight Kg:

Not typically specified in detail for this era but can be inferred from payload capacity.

Wheel Bolt Pattern:

4x110 mm

Tire Sizes:

Common sizes include 165 SR 13, 175/70 HR 13, 185/70 SR 13. Specific sizes depend on trim and factory options.

🛡️ Safety Features

Era Safety Standards:

As per 1970s automotive safety standards. No modern crash test ratings apply.

Braking System:

Front disc brakes, rear drum brakes. Power assist may be optional on some trims.

Parking Brake:

Mechanical, acting on rear wheels.

Seatbelts:

Lap belts standard, 3-point belts optional or standard on higher trims/later models.

Body Construction:

Unitary body construction, with crumple zones and safety cage design typical of the era.

Steering Column:

Collapsible steering column (design varies by year and market).

💡 Technology Features

Era Entertainment System:

Basic AM/FM radio, optional AM/FM with 8-track player or cassette player on higher trims or later models.

Active Safety Features:

Limited to basic safety engineering of the era. No electronic stability control, ABS, or traction control.

Passive Safety Features:

Collapsible steering column, safety glass, basic body structure reinforcement.

Connectivity Options:

N/A for this era. No onboard computers or digital connectivity.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000 - 5,000 miles or 6 months, whichever comes first. Manual will specify exact interval and oil type.

Spark Plug Replacement:

Intervals vary for rotary plugs; manual provides specifics.

Coolant Flush:

Typically every 2 years or 30,000 miles, but specific rotary cooling system recommendations apply.

Ignition Timing Check:

Recommended at regular service intervals, especially if performance issues arise.

Engine Oil Type:

Mazda specifically recommended API SE, SF rated oils. Viscosity like 10W-30 or 10W-40 would be common. Crucially, it must be suitable for rotary engines, which may have different additive packages than standard automotive oils of the era.

Coolant Type:

Ethylene glycol-based antifreeze, mixed with distilled water (typically 50/50 ratio).

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic brake fluid.

Transmission Fluid Type:

Manual: Gear oil API GL-4. Automatic: DEXRON II or equivalent.

Apex Seal Wear:

The most common and critical issue. Symptoms include loss of compression, increased oil consumption, rough idle, and difficulty starting. Requires engine rebuild.

Oil Seal Failure:

Corner seals and side seals can degrade, leading to oil leaks and internal damage.

Carburetor Issues:

Wear and tear on carburetors can lead to idle instability, poor fuel economy, and tuning difficulties.

Cooling System Performance:

Rotary engines run hotter and require a well-maintained cooling system. Overheating can exacerbate apex seal wear.

Ignition System:

Points and condenser ignition systems require regular maintenance. Distributor wear can affect timing.

Example Oil Filter:

Specific part numbers would be in the manual, but aftermarket equivalents exist (e.g., Fram PH series, Wix 51049, Mann W 712/20).

📚 Vehicle History

Rotary Pioneering:

Mazda's commitment to the rotary engine began with the Cosmo Sport and continued with mass-produced models like the RX-2 and RX-3, defining their performance image.

Rx2 Introduction:

Introduced in 1970 as the Mazda Capella Rotary (RX-2 in export markets). Available as a 2-door coupe and 4-door sedan.

Rx3 Introduction:

Introduced in 1971 as the Mazda Savanna Rotary (RX-3 in export markets). Offered in coupe and wagon (estate) body styles, with a sportier focus.

Updates And Facelifts:

Both models received minor styling updates and engine enhancements throughout their production runs, including chassis code variations reflecting these changes.

Production Years:

RX-2: 1970-1978 (market dependent, often superseded by RX-4/RX-5 later). RX-3: 1971-1978 (often superseded by Mazda MAZDA ROADSTER Coupe in some markets).

Racing History:

The RX-2 and RX-3, particularly the RX-3, were successful in various motorsport disciplines, including circuit racing and rallying, showcasing the durability and performance of the rotary engine.

🏆 Awards & Recognition

Rotary Engine Impact:

Mazda's rotary engines, showcased in models like the RX-2 and RX-3, were revolutionary and earned significant recognition for innovation and performance in their time.

Road Test Period Accolades:

Contemporary road tests praised the smooth power delivery, handling, and sporty aesthetics of the RX-2 and RX-3, often highlighting their unique appeal against conventional piston-engined rivals.

Manufacturing Standards:

Built to Mazda's Japanese manufacturing standards of the period.