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OPEL MANTA & GT 1900 1970-1975 Factory Service Repair Manual

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🏷️ Basic Information Identification Make: Opel Model: Manta / GT 1900 Model Variant: Manta GT 1900, GT 1900 Codes Chassis Code Manta: 1970-1975: Opel 148 (A-Body) Chassis Code Gt: 1970-1973: Opel 185 (Rear-wheel drive GT/E, GT/J) 👋 Introduction Market Position Market Position: The Opel Manta and GT were positioned as sporty, stylish, and accessible European coupes and fastbacks, competing with models like the Ford Capri and Volkswagen Scirocco. They offered a blend of German engineering with a focus on driving dynamics and everyday usability. Competitive Analysis Competitive Analysis: Competed directly with the Ford Capri, which offered a similar sporty coupe profile. The Manta was often seen as a more refined and robust alternative, while the GT offered a unique compact sports car experience. Both appealed to drivers seeking performance and style at a reasonable price point. Key Features Key Features: Rear-wheel drive, robust German engineering, stylish coupe/fastback design, emphasis on driving engagement, availability of sporty trims (e.g., GT/E, GT/J), reliable 1.9L engine. 📋 Manual Details Coverage Areas Coverage Areas: Electrical, Frame and Bumpers, Suspension and Steering, Rear Axle, Brakes, Engine, Transmission, Chassis Sheet Metal, Accessories Page Count Page Count: Not specified in product information, but described as 'very comprehensive' Manual Type Manual Type: Factory Service Repair Manual / Workshop Manual Language Language: Likely English (based on product description language) Format Format: Not explicitly stated, but typically digital (PDF) or printed for this era of manual. 📖 Manual Coverage Systems Covered Systems Covered: Engine overhaul and repair (1.9L), ignition system, charging system, starting system, lighting, fuel system, cooling system, exhaust system, clutch, gearbox, driveshaft, rear axle differential, braking system (hydraulic, drum/disc), steering linkage, front and rear suspension, chassis structure, body panel repair, interior trim, accessories operation and repair. Procedures Included Procedures Included: Routine maintenance, scheduled servicing, troubleshooting diagnostic charts, component removal and installation, adjustment procedures, overhaul instructions, torque specifications, electrical wiring diagrams, component testing, repair methods, lubrication specifications. Technical Depth Technical Depth: Comprehensive factory-level detail suitable for professional technicians, covering everything from basic fluid changes to complete engine and transmission rebuilds, electrical system diagnostics, and body repair. 📊 Manual Specifications File Format File Format: Assumed PDF for digital versions, original print for physical. Quality of digital reproduction can vary. Print Quality Print Quality: Original factory print quality. Digital reproductions aim to match or exceed this clarity. Binding Type Binding Type: Typically a sturdy perfect-bound or spiral-bound format for ease of use in a workshop. Paper Type Paper Type: Original manuals often printed on durable, sometimes coated paper to withstand workshop environments. ⚙️ Engine Specifications Primary Engine Primary Engine: Opel CIH (Cam in Head) Inline-4, 1.9 Liters (1897 cc) Performance Engine Performance 1.9L: Approximately 90-100 HP (DIN) and 150-155 Nm (110-114 lb-ft) of torque, depending on specific carburetion and tuning (e.g., single or twin Zenith carburetors, or Bosch L-Jetronic fuel injection on GT/E variants). Fuel System Fuel System 1.9L: Carbureted (single or twin Zenith 36/40 INAT or similar) or Bosch L-Jetronic fuel injection on performance variants. Bore Stroke Bore Stroke 1.9L: Bore: 84.8 mm (3.34 in), Stroke: 85.0 mm (3.35 in) Compression Ratio Compression Ratio 1.9L: Typically 8.5:1 or 9.2:1 for standard and higher-performance versions, respectively. Engine Oil Type Engine Oil Type: API SF or SG rated, SAE 10W-30 or 10W-40 (refer to manual for precise OEM specifications). Engine Oil Capacity Engine Oil Capacity: Approximately 4.5 liters (4.8 US quarts) with filter change. 🔧 Transmission Standard Standard Transmission: 4-speed manual transmission. Optional Optional Transmission: 3-speed automatic transmission (e.g., GM's Turbo Hydra-Matic 350 or similar variant). Features Transmission Features: Rear-wheel drive layout, robust construction for its era. Transmission Fluid Type Transmission Fluid Type: Manual: GL-4 Hypoid gear oil, SAE 80W/90. Automatic: DEXRON®-II or equivalent. Transmission Fluid Capacity Transmission Fluid Capacity: Manual: ~1.2 liters. Automatic: ~3.0 liters (fill) 📐 Dimensions Exterior Wheelbase: Manta: ~2,440 mm (96.1 in). GT: ~2,020 mm (79.5 in) Length: Manta: ~4,070 mm (160.2 in). GT: ~3,800 mm (149.6 in) Width: Manta: ~1,620 mm (63.8 in). GT: ~1,590 mm (62.6 in) Height: Manta: ~1,350 mm (53.1 in). GT: ~1,220 mm (48.0 in) Weights Curb Weight: Manta: ~1000-1150 kg (2200-2535 lbs). GT: ~850-950 kg (1870-2095 lbs) Gross Vehicle Weight Rating: Not specified, but typically around 1400-1500 kg for Manta. Fuel Tank Capacity: Approximately 46 liters (12.2 US gallons). 🛡️ Safety Features Ratings Safety Ratings: No formal crash test ratings from modern agencies exist for these vehicles. Safety features were basic by today's standards. Active Features Active Features: Front disc brakes, rear drum brakes, optional power-assisted brakes on some models. Passive Features Passive Features: Seat belts (lap belts standard, optional inertia reel), reinforced passenger cell (for its era), padded dashboard. Braking System Specs Front Brakes: Ventilated discs (e.g., 256 mm) on most 1.9L models. GT models often had larger discs. Rear Brakes: Drum brakes. Steering Type Steering Type: Recirculating ball steering. Optional power...
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OPEL MANTA & GT 1900 1970-1975 Factory Service Repair Manual
🏷️ Basic Information
Identification
Make:
Opel
Model:
Manta / GT 1900
Model Variant:
Manta GT 1900, GT 1900
Codes
Chassis Code Manta:
1970-1975: Opel 148 (A-Body)
Chassis Code Gt:
1970-1973: Opel 185 (Rear-wheel drive GT/E, GT/J)
👋 Introduction
Market Position
Market Position:
The Opel Manta and GT were positioned as sporty, stylish, and accessible European coupes and fastbacks, competing with models like the Ford Capri and Volkswagen Scirocco. They offered a blend of German engineering with a focus on driving dynamics and everyday usability.
Competitive Analysis
Competitive Analysis:
Competed directly with the Ford Capri, which offered a similar sporty coupe profile. The Manta was often seen as a more refined and robust alternative, while the GT offered a unique compact sports car experience. Both appealed to drivers seeking performance and style at a reasonable price point.
Key Features
Key Features:
Rear-wheel drive, robust German engineering, stylish coupe/fastback design, emphasis on driving engagement, availability of sporty trims (e.g., GT/E, GT/J), reliable 1.9L engine.
📋 Manual Details
Coverage Areas
Coverage Areas:
Electrical, Frame and Bumpers, Suspension and Steering, Rear Axle, Brakes, Engine, Transmission, Chassis Sheet Metal, Accessories
Page Count
Page Count:
Not specified in product information, but described as 'very comprehensive'
Manual Type
Manual Type:
Factory Service Repair Manual / Workshop Manual
Language
Language:
Likely English (based on product description language)
Format
Format:
Not explicitly stated, but typically digital (PDF) or printed for this era of manual.
📖 Manual Coverage
Systems Covered
Systems Covered:
Engine overhaul and repair (1.9L), ignition system, charging system, starting system, lighting, fuel system, cooling system, exhaust system, clutch, gearbox, driveshaft, rear axle differential, braking system (hydraulic, drum/disc), steering linkage, front and rear suspension, chassis structure, body panel repair, interior trim, accessories operation and repair.
Procedures Included
Procedures Included:
Routine maintenance, scheduled servicing, troubleshooting diagnostic charts, component removal and installation, adjustment procedures, overhaul instructions, torque specifications, electrical wiring diagrams, component testing, repair methods, lubrication specifications.
Technical Depth
Technical Depth:
Comprehensive factory-level detail suitable for professional technicians, covering everything from basic fluid changes to complete engine and transmission rebuilds, electrical system diagnostics, and body repair.
📊 Manual Specifications
File Format
File Format:
Assumed PDF for digital versions, original print for physical. Quality of digital reproduction can vary.
Print Quality
Print Quality:
Original factory print quality. Digital reproductions aim to match or exceed this clarity.
Binding Type
Binding Type:
Typically a sturdy perfect-bound or spiral-bound format for ease of use in a workshop.
Paper Type
Paper Type:
Original manuals often printed on durable, sometimes coated paper to withstand workshop environments.
⚙️ Engine Specifications
Primary Engine
Primary Engine:
Opel CIH (Cam in Head) Inline-4, 1.9 Liters (1897 cc)
Performance
Engine Performance 1.9L:
Approximately 90-100 HP (DIN) and 150-155 Nm (110-114 lb-ft) of torque, depending on specific carburetion and tuning (e.g., single or twin Zenith carburetors, or Bosch L-Jetronic fuel injection on GT/E variants).
Fuel System
Fuel System 1.9L:
Carbureted (single or twin Zenith 36/40 INAT or similar) or Bosch L-Jetronic fuel injection on performance variants.
Bore Stroke
Bore Stroke 1.9L:
Bore: 84.8 mm (3.34 in), Stroke: 85.0 mm (3.35 in)
Compression Ratio
Compression Ratio 1.9L:
Typically 8.5:1 or 9.2:1 for standard and higher-performance versions, respectively.
Engine Oil Type
Engine Oil Type:
API SF or SG rated, SAE 10W-30 or 10W-40 (refer to manual for precise OEM specifications).
Engine Oil Capacity
Engine Oil Capacity:
Approximately 4.5 liters (4.8 US quarts) with filter change.
🔧 Transmission
Standard
Standard Transmission:
4-speed manual transmission.
Optional
Optional Transmission:
3-speed automatic transmission (e.g., GM's Turbo Hydra-Matic 350 or similar variant).
Features
Transmission Features:
Rear-wheel drive layout, robust construction for its era.
Transmission Fluid Type
Transmission Fluid Type:
Manual: GL-4 Hypoid gear oil, SAE 80W/90. Automatic: DEXRON®-II or equivalent.
Transmission Fluid Capacity
Transmission Fluid Capacity:
Manual: ~1.2 liters. Automatic: ~3.0 liters (fill)
📐 Dimensions
Exterior
Wheelbase:
Manta: ~2,440 mm (96.1 in). GT: ~2,020 mm (79.5 in)
Length:
Manta: ~4,070 mm (160.2 in). GT: ~3,800 mm (149.6 in)
Width:
Manta: ~1,620 mm (63.8 in). GT: ~1,590 mm (62.6 in)
Height:
Manta: ~1,350 mm (53.1 in). GT: ~1,220 mm (48.0 in)
Weights
Curb Weight:
Manta: ~1000-1150 kg (2200-2535 lbs). GT: ~850-950 kg (1870-2095 lbs)
Gross Vehicle Weight Rating:
Not specified, but typically around 1400-1500 kg for Manta.
Fuel Tank Capacity:
Approximately 46 liters (12.2 US gallons).
🛡️ Safety Features
Ratings
Safety Ratings:
No formal crash test ratings from modern agencies exist for these vehicles. Safety features were basic by today's standards.
Active Features
Active Features:
Front disc brakes, rear drum brakes, optional power-assisted brakes on some models.
Passive Features
Passive Features:
Seat belts (lap belts standard, optional inertia reel), reinforced passenger cell (for its era), padded dashboard.
Braking System Specs
Front Brakes:
Ventilated discs (e.g., 256 mm) on most 1.9L models. GT models often had larger discs.
Rear Brakes:
Drum brakes.
Steering Type
Steering Type:
Recirculating ball steering. Optional power steering on some Manta models.
💡 Technology Features
Infotainment
Infotainment System:
Basic analog radio (AM/FM) and speaker system. No complex infotainment or digital displays.
Driver Assistance
Driver Assistance Features:
None by modern standards. Focus was on mechanical feedback and driver control.
Connectivity
Connectivity Features:
No external connectivity or Bluetooth. Basic electrical systems for ignition, lighting, and accessories.
🔧 Maintenance
Service Intervals
Engine Oil Change Interval:
Every 5,000 - 10,000 km (3,000 - 6,000 miles) or 6-12 months, whichever comes first. (Refer to manual for exact recommendation).
Spark Plug Replacement:
Typically every 20,000 - 30,000 km (12,000 - 18,000 miles).
Transmission Fluid Change Interval:
Manual: Every 40,000 - 60,000 km (25,000 - 37,000 miles). Automatic: Every 20,000 - 40,000 km (12,000 - 25,000 miles) or as per manual. (Refer to manual for exact recommendation).
Brake Fluid Flush:
Every 2 years (hygroscopic nature of brake fluid).
Fluid Specifications
Coolant Type:
Ethylene glycol based antifreeze/coolant, mixed with distilled water. (Refer to manual for specific OEM coolant specification).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Known Issues
Common Issues Engine:
Oil leaks from valve cover gasket or oil pan, cooling system leaks (radiator, hoses), carburetor tuning issues, wear on timing chain/tensioner.
Common Issues Body:
Rust in common areas: wheel arches, sills, floor pans, around windows, boot lid, and front strut towers. Door seals and window seals can degrade.
Common Issues Suspension:
Worn ball joints, tie rod ends, and bushings due to age and mileage. Steering box wear.
Common Issues Electrical:
Aging wiring harnesses can become brittle and cause intermittent faults. Lucas or Bosch electrical components can be prone to failure with age.
Filter Part Numbers
Oil Filter Example:
Mann-Filter W 920/3, Mahle OC 73, Bosch 0 451 103 006 (Cross-reference required for specific model/engine variant).
Air Filter Example:
Mann-Filter C 35118, Mahle LX 51, Bosch 1 457 429 484 (Cross-reference required for specific model/engine variant).
📚 Vehicle History
Brand Heritage
Brand Heritage:
Opel, a German automobile manufacturer founded in 1862, was part of General Motors from 1929 until 2017. Known for producing reliable, well-engineered, and accessible vehicles for the European market.
Model Evolution
Model Evolution Manta:
The Opel Manta (introduced 1970) was designed as GM's answer to the Ford Capri, a sporty coupe based on the Rekord sedan platform. It was characterized by its long hood, short deck, and distinctive 'Coke bottle' styling. It became a very popular model in Europe for its blend of style and performance.
Model Evolution Gt:
The Opel GT (introduced 1968, phased out by 1973) was a compact, rear-wheel-drive sports car with a unique 'turbine' styling and distinctive hidden pop-up headlights. It was built on a shortened Kadett B chassis and offered a more focused sports car experience than the Manta.
Production
Production Years:
Manta A: 1970-1975. GT: 1968-1973 (though the manual covers 1970-1975, implying overlap or specific variants being serviced).
Production Locations
Production Locations:
Primarily Rüsselsheim, West Germany.
🏆 Awards & Recognition
Recognitions
Model Recognitions:
While specific awards might not be widely documented for this era, the Manta was a very popular and successful model in its segment across Europe. The GT was celebrated for its striking design and sporty appeal.
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