Model Code:
ANWB51 (MkI), AHB21 (MkII), AAC809 (1500)
Chassis Codes:
GAN1, GAN2, GAN3, GAN4, GAN5
Positioning:
Essential resource for owners and enthusiasts of the classic MG Midget, enabling DIY maintenance and repair to preserve its heritage and usability.
Advantage:
Digital PDF format offers superior convenience, searchability, and cost-effectiveness compared to older printed manuals. Provides complete coverage across multiple model years.
Accessibility:
Accessible on all Windows and Mac computers, smartphones, and tablets via web browser or Adobe PDF Reader.
Content Benefit:
Empowers users to perform repairs, saving significant costs associated with professional mechanic labor. Enhances understanding and enjoyment of the vehicle.
Primary Coverage:
1958-1971 MG Midget
Engine Coverage:
1098cc OHV Inline-4 (10CG/10MG), 1275cc OHV Inline-4 (12G/12GE)
Transmission Coverage:
4-speed manual (all variants)
Estimated Pages:
Hundreds (as per description)
Type:
Factory Service Repair Workshop Manual
Powertrain:
Engine overhaul, lubrication, cooling system, fuel system (carburetion & early injection), exhaust system, drivetrain, differential, axle
Chassis:
Suspension (front & rear), steering system, brakes (hydraulic, front discs, rear drums), wheels, tires
Electrical:
Wiring diagrams, ignition system, lighting, charging system (dynamo/alternator), starter motor, instrumentation, accessory circuits
Body Interior:
Body construction, chassis, doors, hood, trunk, interior trim, upholstery, heater, restraint systems (later models)
Routine Maintenance:
Oil changes, filter replacements, fluid checks, lubrication schedules, spark plug replacement, ignition timing adjustment, carburettor tuning
Repair Rebuild:
Engine rebuilds, gearbox overhaul, brake system overhaul, suspension component replacement, steering rack repair, electrical component diagnosis and repair
Troubleshooting:
Diagnostic procedures for common starting, running, electrical, and mechanical faults
Depth:
Comprehensive factory-level detail, including component removal, disassembly, inspection, repair, assembly, and adjustment. Suitable for both amateur and professional mechanics.
Engine Type 1:
BMC A-Series OHV Inline-4
Displacement 1:
1098 cc (67.1 cu in)
Bore X Stroke 1:
80.4 mm x 53.7 mm (3.165 in x 2.114 in)
Compression Ratio 1:
8.3:1 (typical)
Carburetion 1:
Single Stromberg CD150 or SU HS2
Horsepower 1:
Approx. 55-57 bhp @ 5500 rpm
Torque 1:
Approx. 65-67 lb-ft @ 3000 rpm
Engine Type 2:
BMC A-Series OHV Inline-4
Displacement 2:
1275 cc (77.8 cu in)
Bore X Stroke 2:
70.6 mm x 81.3 mm (2.780 in x 3.201 in)
Carburetion 2:
Twin SU HS4 or Single Stromberg CD175
Horsepower 2:
Approx. 65-66 bhp @ 5750 rpm
Torque 2:
Approx. 72-74 lb-ft @ 3500 rpm
Fuel Type:
Unleaded gasoline (octane rating to be specified in manual for specific models/tuning)
Injection Coverage:
Early models are carbureted; later model (1972+) Midgets had fuel injection, which is *not* covered by this 1958-1971 manual.
Transmission Type:
4-speed Manual Synchromesh
Optional Transmission:
None offered during this period
Gear Ratios:
Specific ratios vary slightly between models and are detailed within the manual.
Fluid Type:
Manual Transmission Fluid (MTF), typically SAE 80W or 90W (refer to manual for exact specification)
Length:
Approx. 140-155 inches (3556-3937 mm) depending on model
Width:
Approx. 52-54 inches (1321-1372 mm)
Height:
Approx. 47-49 inches (1194-1245 mm)
Wheelbase:
Approx. 80-82 inches (2032-2083 mm) depending on model
Curb Weight:
Approx. 1500-1700 lbs (680-771 kg)
Crash Testing:
Modern crash safety standards were not a primary design focus for vehicles of this era. Manual will not contain specific safety ratings from modern agencies.
Braking System:
Front disc brakes, Rear drum brakes. Manual covers hydraulic system maintenance, bleeding, and component replacement.
Seatbelts:
Optional on early models, standard on later models within this range. Manual covers installation and adjustment.
Infotainment System:
Basic analogue instrumentation (speedometer, tachometer, fuel gauge, oil pressure, temperature). No electronic infotainment system present.
Driver Assistance Features:
No electronic driver assistance features. Focus is on mechanical feedback and driver interaction.
Connectivity Options:
N/A. Vehicle is from an era before widespread vehicle connectivity.
Oil Change:
Typically every 3,000 miles or 6 months, whichever comes first (refer to manual for specific recommendations based on usage).
Engine Oil Type:
Viscosity grade to be confirmed in manual, typically 20W-50 or 10W-30 depending on climate and engine condition. May specify API SG or similar.
Coolant:
Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio). Capacity around 10 pints (4.7 liters).
Brake Fluid:
DOT 3 or DOT 4 glycol-based brake fluid. Manual will specify the exact type and capacity.
Grease Points:
Periodic lubrication of suspension kingpins, steering joints, and driveshaft splines is crucial. Manual will detail points and grease type.
Rust:
Common on all classic British sports cars, particularly sills, wheel arches, and floor pans. Manual provides body repair guidance.
Engine Oil Leaks:
Leaking seals and gaskets (e.g., front/rear crankshaft seals, sump gasket) are common. Manual details replacement procedures.
Overheating:
Can occur due to aging cooling system components (radiator, water pump, hoses). Manual covers system flushing and component replacement.
Carburetor Tuning:
SU carburetors require periodic adjustment for optimal performance and fuel economy. Manual provides detailed tuning instructions.
Heritage:
MG (Morris Garages) has a long history of producing popular, affordable sports cars and convertibles known for their sporting character and driver engagement.
Evolution Overview:
The MG Midget was developed by the British Motor Corporation (BMC) as a small, economical sports car. It was closely related to the Austin-Healey Sprite but featured distinctive MG styling and badging. Key evolutionary steps included engine size increases (from 948cc to 1098cc, then to 1275cc) and chassis/body modifications to meet evolving standards and market demands.
Production Period:
1961-1979 (This manual covers the first three generations: MkI, MkII, and early MkIII up to 1971, which included the 1098cc and 1275cc engines).
Manufacturing Location:
Abingdon, Oxfordshire, England
Club Awards:
The MG Midget is a highly regarded classic car, frequently awarded at marque-specific shows and general classic car events for originality, restoration quality, and overall condition.
Reliability Perception:
Reliability depends heavily on maintenance history and quality of parts used. This manual is key to ensuring reliable operation.
Historical Significance:
Considered an iconic British sports car, representing accessible motoring and the spirit of open-top motoring.
