Manual Coverage
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Systems Covered
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Engine Mechanical:
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Full overhaul, repair, and troubleshooting of engine components (block, pistons, crankshaft, cylinder head, valve train)
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Engine Electrical:
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Ignition system, starting system, charging system, wiring diagrams
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Emission Control:
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Components and procedures related to emission control systems (e.g., EGR, catalytic converters for later models)
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Fuel System:
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Carburetor (SU, Weber) and fuel injection (later models) systems, fuel pump, lines, and filters
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Clutch System:
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Clutch assembly, hydraulic system, linkage, adjustment, and replacement
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Manual Transaxle:
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Gearbox overhaul, repair, fluid changes, and troubleshooting
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Automatic Transaxle:
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Repair and maintenance of automatic transmission (if applicable to specific models covered)
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Driveshaft Axle:
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Front-wheel drive axle shafts, CV joints, differential (if integrated into transaxle)
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Suspension:
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Front and rear suspension components, springs, shock absorbers, bushings, alignment
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Steering:
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Steering rack, column, linkage, power steering (if equipped), alignment
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Restraint System:
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Seat belts, potential airbag systems (if introduced late in production, though unlikely for early models)
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Brake System:
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Front and rear brakes (disc/drum), hydraulic system, master cylinder, lines, calipers, pads, shoes, parking brake
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Body Interior Exterior:
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Body panel repair, door mechanisms, trim, glass, seals, seats, dashboard
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Body Electrical:
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Lighting, wipers, horn, instrumentation, power windows (if equipped), central locking (if equipped)
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HVAC:
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Heating system, ventilation, demisting, air conditioning (if factory-fitted)
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Procedures Included
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Maintenance:
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Oil changes, filter replacements, spark plug service, fluid checks and changes, tune-ups, brake adjustments
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Troubleshooting:
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Diagnostic procedures for common faults across all systems, fault code interpretation (if applicable)
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Repair:
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Step-by-step instructions for component removal, repair, and reinstallation
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Rebuild:
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Comprehensive procedures for engine and transmission rebuilds
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Wiring Schematics:
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Detailed electrical wiring diagrams for all vehicle systems
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Illustrations Diagrams:
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Abundant diagrams and illustrations to clarify repair procedures
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Technical Depth
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Depth:
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Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds
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Engine Specifications
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Primary Engine
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Engine Family:
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BMC A-Series derived engines (e.g., A-Plus)
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Common Displacements:
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1275cc (significant for MG variants), also 998cc (for standard Metros)
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Cylinder Configuration:
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Inline 4-cylinder
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Cylinder Head:
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Typically cast iron, sometimes aluminum for performance variants
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Performance
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Typical Horsepower:
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Around 60-70 bhp for 1275cc MG models, up to 70-75 bhp for MG Turbo variants
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Typical Torque:
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Varies by engine, e.g., 70-80 lb-ft for 1275cc
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Fuel System
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Carburetion:
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SU HS4 twin carburetors common on MG models, or single SU/Weber
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Fuel Injection:
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Introduced on later models (e.g., MG Metro EFi)
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically every 6,000-10,000 miles or 6-12 months (refer to manual for exact specification).
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Spark Plug Replacement:
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Intervals vary by plug type, often 10,000-20,000 miles.
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Timing Belt Chain:
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A-Series engines use a timing chain, which typically requires inspection but not regular replacement unless issues arise.
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Fluid Specifications
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Engine Oil:
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SAE 20W/50 or 10W/40 (depending on climate and engine condition, consult manual for specific grades like Castrol GTX).
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Coolant:
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Ethylene Glycol based antifreeze/coolant, typically a 50/50 mix with distilled water.
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Transmission Fluid:
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EP 90 Gear Oil for manual transaxle.
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Brake Fluid:
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DOT 3 or DOT 4 hydraulic fluid.
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Known Issues
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Rust Corrosion:
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Prone to rust, particularly around wheel arches, sills, and suspension mounting points, common for British cars of this era.
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Engine Cooling:
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Potential for overheating if cooling system (radiator, hoses, water pump) is not maintained.
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Carburetor Issues:
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SU carburetors can require periodic adjustment and rebuild due to wear or gumming.
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Suspension Wear:
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Bushings and ball joints can wear over time, affecting handling and ride quality.
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