🏷️ Basic Information Identification Make: Mazda Model: Cosmo Model Generation: CD Series (Second Generation) Year Range: 1977-1978 Codes Chassis Codes: PBVC, PBVH 👋 Introduction Market Position Market Segment: Compact personal luxury coupe and sedan, known for distinctive styling and rotary engine options (in some markets/variants). Competitive Analysis Key Competitors: Toyota Corona, Nissan Bluebird (Datsun 510), Honda Accord, Mitsubishi Galant Key Features Vehicle Strengths: Unique styling, often featuring rotary engine technology (Cosmo AP, Cosmo CD variants), comfortable ride, good build quality for its time. Manual Value Proposition: Essential resource for owners and independent mechanics seeking to maintain and repair the unique Mazda Cosmo of this era, particularly the rotary engine variants and specific mechanicals not found in common inline-engine vehicles. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Procedures Page Count Estimated Page Count: Approx. 500-700 pages (based on typical manuals of this era and scope) Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Physical Printed Manual (likely) 📖 Manual Coverage Systems Covered Engine: Engine mechanicals, cooling system, lubrication system, fuel system (carburetor), ignition system, emission control systems Transmission: Manual transmission (4-speed, 5-speed), automatic transmission (if applicable), clutch system, driveline, axles Brakes: Front disc brakes, rear drum brakes, hydraulic system, parking brake Steering: Steering gear, steering column, power steering system (if equipped) Suspension: Front independent suspension (MacPherson strut), rear suspension (leaf springs or coil springs), shock absorbers, bushings Electrical: Battery, charging system (alternator), starting system (starter motor), lighting system, instrumentation, fuses, wiring diagrams, auxiliary systems Body: Body construction, exterior trim, doors, windows, seats, interior trim, HVAC system (heater, ventilation) Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, lubrication, tune-ups, fluid checks and changes Troubleshooting: Diagnostic procedures for common problems, symptom-based troubleshooting guides Repair: Detailed step-by-step repair instructions for all major mechanical and electrical components, disassembly and reassembly of major assemblies Diagnostics: Component testing, diagnostic charts, electrical schematics interpretation Technical Depth Depth: Comprehensive: Covers routine maintenance to major component overhaul and repair, including specifications for torques, clearances, and adjustments. 📊 Manual Specifications File Format Digital Format If Applicable: N/A (assumed print) Print Quality Print Quality Description: Likely black and white line drawings, diagrams, and text. Print quality will vary with the specific publisher and original printing. Binding Type Binding Type: Stapled, perfect bound, or spiral bound (depending on the publisher) Paper Type Paper Type: Standard newsprint or pulp paper, common for workshop manuals of the era. ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4 Piston Engine (for this specific model year range, though rotary engines were prominent in other Cosmo generations) Engine Type Details Displacement And Code: Likely a 1.6L (1586cc) or 1.8L (1769cc) 'Mazda E-series' inline-four. Specific engine codes may include MA, MB, or similar variants. Rotary engines (e.g., 12A) were available in earlier/later Cosmo models but may not be primary for the 77-78 CD series in all markets. Performance Horsepower: Estimated 70-90 HP (for 1.6L/1.8L inline-4 variants) Torque: Estimated 80-100 lb-ft (for 1.6L/1.8L inline-4 variants) Fuel System Fuel Delivery: Carburetor (likely single or twin barrel, e.g., Hitachi or Mikuni) Ignition System Ignition Type: Breaker Point Ignition or Early Electronic Ignition (CDI may be present on some variants) 🔧 Transmission Standard Standard Transmission: 4-speed Manual Transmission Optional Optional Transmission: 3-speed Automatic Transmission Features Clutch Type: Dry Single Plate Clutch Transmission Fluid Type: GL-4 Gear Oil (e.g., SAE 80W-90) 📐 Dimensions Exterior Body Styles: 2-door Coupe, 4-door Sedan Wheelbase: Approx. 2500-2520 mm (98.4-99.2 inches) Length: Approx. 4300-4400 mm (169.3-173.2 inches) Width: Approx. 1620-1660 mm (63.8-65.4 inches) Height: Approx. 1350-1390 mm (53.1-54.7 inches) Weights Curb Weight: Approx. 1000-1150 kg (2200-2535 lbs) Wheel Bolt Pattern: 4x110 mm (Common for Mazda of this era) Tire Sizes: Commonly 175/70R13, 185/70R13 (check specific trim/option) 🛡️ Safety Features Ratings Crash Test Data Era: No standardized crash test data readily available for this model year/era comparable to modern ratings. Active Features Braking System: Front Disc Brakes, Rear Drum Brakes. No ABS. Passive Features Restraints: Lap and shoulder belts (front occupants), lap belts (rear occupants). No airbags. Body Structure: Designed with a unibody construction common for the era, incorporating crumple zones to some extent. 💡 Technology Features Infotainment Audio System: Factory fitted AM/FM radio, possibly with cassette player on higher trims or as an option. Manual covers speaker installation/removal and radio diagnostics. Driver Assistance Assistance Features: Very limited by modern standards. Features would typically include power steering (optional), and potentially intermittent wipers. No electronic driver aids like ABS or airbags. Connectivity Connectivity Features: None in the modern sense. Focus on basic electrical systems for lights, signals, and diagnostics. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 miles (5,000-8,000 km) or 6 months. Tune Up Interval: Every 15,000-30,000 miles (24,000-48,000 km), involving spark plugs, ignition timing, carburetor adjustment. Fluid Specifications Engine Oil Type: API SF or SG classification, SAE 10W-30...
Compact personal luxury coupe and sedan, known for distinctive styling and rotary engine options (in some markets/variants).
Competitive Analysis
Key Competitors:
Toyota Corona, Nissan Bluebird (Datsun 510), Honda Accord, Mitsubishi Galant
Key Features
Vehicle Strengths:
Unique styling, often featuring rotary engine technology (Cosmo AP, Cosmo CD variants), comfortable ride, good build quality for its time.
Manual Value Proposition:
Essential resource for owners and independent mechanics seeking to maintain and repair the unique Mazda Cosmo of this era, particularly the rotary engine variants and specific mechanicals not found in common inline-engine vehicles.
📋 Manual Details
Coverage Areas
Primary Coverage:
Service and Repair Procedures
Page Count
Estimated Page Count:
Approx. 500-700 pages (based on typical manuals of this era and scope)
Manual Type
Type:
Factory Service Manual / Workshop Manual
Language
Language:
English
Format
Format:
Physical Printed Manual (likely)
📖 Manual Coverage
Systems Covered
Engine:
Engine mechanicals, cooling system, lubrication system, fuel system (carburetor), ignition system, emission control systems
Comprehensive: Covers routine maintenance to major component overhaul and repair, including specifications for torques, clearances, and adjustments.
📊 Manual Specifications
File Format
Digital Format If Applicable:
N/A (assumed print)
Print Quality
Print Quality Description:
Likely black and white line drawings, diagrams, and text. Print quality will vary with the specific publisher and original printing.
Binding Type
Binding Type:
Stapled, perfect bound, or spiral bound (depending on the publisher)
Paper Type
Paper Type:
Standard newsprint or pulp paper, common for workshop manuals of the era.
⚙️ Engine Specifications
Primary Engine
Engine Type:
Inline-4 Piston Engine (for this specific model year range, though rotary engines were prominent in other Cosmo generations)
Engine Type Details
Displacement And Code:
Likely a 1.6L (1586cc) or 1.8L (1769cc) 'Mazda E-series' inline-four. Specific engine codes may include MA, MB, or similar variants. Rotary engines (e.g., 12A) were available in earlier/later Cosmo models but may not be primary for the 77-78 CD series in all markets.
Performance
Horsepower:
Estimated 70-90 HP (for 1.6L/1.8L inline-4 variants)
Carburetor (likely single or twin barrel, e.g., Hitachi or Mikuni)
Ignition System
Ignition Type:
Breaker Point Ignition or Early Electronic Ignition (CDI may be present on some variants)
🔧 Transmission
Standard
Standard Transmission:
4-speed Manual Transmission
Optional
Optional Transmission:
3-speed Automatic Transmission
Features
Clutch Type:
Dry Single Plate Clutch
Transmission Fluid Type:
GL-4 Gear Oil (e.g., SAE 80W-90)
📐 Dimensions
Exterior
Body Styles:
2-door Coupe, 4-door Sedan
Wheelbase:
Approx. 2500-2520 mm (98.4-99.2 inches)
Length:
Approx. 4300-4400 mm (169.3-173.2 inches)
Width:
Approx. 1620-1660 mm (63.8-65.4 inches)
Height:
Approx. 1350-1390 mm (53.1-54.7 inches)
Weights
Curb Weight:
Approx. 1000-1150 kg (2200-2535 lbs)
Wheel Bolt Pattern:
4x110 mm (Common for Mazda of this era)
Tire Sizes:
Commonly 175/70R13, 185/70R13 (check specific trim/option)
🛡️ Safety Features
Ratings
Crash Test Data Era:
No standardized crash test data readily available for this model year/era comparable to modern ratings.
Active Features
Braking System:
Front Disc Brakes, Rear Drum Brakes. No ABS.
Passive Features
Restraints:
Lap and shoulder belts (front occupants), lap belts (rear occupants). No airbags.
Body Structure:
Designed with a unibody construction common for the era, incorporating crumple zones to some extent.
💡 Technology Features
Infotainment
Audio System:
Factory fitted AM/FM radio, possibly with cassette player on higher trims or as an option. Manual covers speaker installation/removal and radio diagnostics.
Driver Assistance
Assistance Features:
Very limited by modern standards. Features would typically include power steering (optional), and potentially intermittent wipers. No electronic driver aids like ABS or airbags.
Connectivity
Connectivity Features:
None in the modern sense. Focus on basic electrical systems for lights, signals, and diagnostics.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 3,000-5,000 miles (5,000-8,000 km) or 6 months.
Tune Up Interval:
Every 15,000-30,000 miles (24,000-48,000 km), involving spark plugs, ignition timing, carburetor adjustment.
Fluid Specifications
Engine Oil Type:
API SF or SG classification, SAE 10W-30 or 10W-40 is common, consult manual for exact viscosity and capacity (approx. 4.0-4.5 quarts / 3.8-4.3 liters).
Coolant Type:
Ethylene glycol based antifreeze, typically a 50/50 mix with distilled water. Capacity approx. 6.0-7.0 quarts (5.7-6.6 liters).
Brake Fluid Type:
DOT 3 or DOT 4 (check manual), ensure system is flushed and refilled as per schedule.
Known Issues
Common Wear Items:
Ignition components (points, condenser, coil), carburetor wear and tuning issues, suspension bushings, exhaust system corrosion, clutch wear, potential for cooling system leaks (radiator, hoses).
Rotary Specific Issues If Applicable:
For Cosmo models equipped with rotary engines (less common for 77-78 CD in many markets, but possible), apex seal wear, oil seal issues, and carburetor jetting for specific emissions regulations were key concerns. This manual should detail these if the specified engine is rotary.
📚 Vehicle History
Brand Heritage
Mazda Innovation:
Mazda has a history of embracing innovative powertrain technologies, notably the Wankel rotary engine, which was a significant differentiator for many of its models, including early generations of the Cosmo.
Model Evolution
Cosmo Lineage:
The Mazda Cosmo lineage dates back to 1967, starting with the revolutionary Cosmo Sport 110S, the first production car with a twin-rotor Wankel engine. The 1977-1978 models represent the second generation (CD series), which moved towards more conventional inline-four engines in many markets while retaining a focus on personal luxury and distinctive styling. This generation shared its platform with the Mazda Luce (Mazda 929 in export markets).
Production
Manufacturing Location:
Japan
Production Years:
Cosmo CD Series: 1975-1981
🏆 Awards & Recognition
Recognitions
Automotive Press Acclaim:
While specific awards for the 1977-78 Cosmo are not widely documented, Mazda as a brand was recognized for its engineering prowess, particularly with the Wankel engine. The Cosmo was often praised for its comfortable ride and distinctive styling within its segment.
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