14 TECHNICAL ADVICE moss-europe.co.uk London 020 8867 2020 Bradford 01274 539 999 MGB Roadster Identification Data Power Unit Identification MODEL COMMENCING FINISHING Serial Number Prefix Code (not V8) { 18G/U/101 18G/U/31121 The engine number prefix comprises a series of letters and numbers, presenting in code the cubic capacity, MGB Engine No | 18GA/U/101 18GA/U/17500 make, the ancillaries fitted, and the compression. Roadster } 18GB/*/101 18GB/*/91200 (G-HN3) Car No G-HN3-101 G-HN3-138400 1st PREFIX GROUP - Cubic capacity, make & type Body No MGB 101 MGB 100292 1st PREFIX NUMBER: 18 - 1800 1st PREFIX LETTER: G - MG or V - Vertical Line { 18GD/*/101 18GD/*/7000 Engine No | 18GG/*/101 18GG/*/8700 2nd PREFIX GROUP - Gearbox and Ancillaries | (USA) 18GF/*/101 18GF/*/13650 LETTER U - Centre gear change R - Overdrive RC - Automatic MGB } (USA) 18GH/*/101 18GH/*/22208 RWC - Centre gear change with overdrive Roadster Car No G-HN4-138401 G-HN4-187210 OR NUMBER 581 F Prefix Letter (G-HN4) Commission No G23N-101F G-23N-28506F Prefix number Commission No (USA) GU23N-101F GU23N-28926F Note: For a fuller list of prefix numbers and their breakdown see next chart. Body No MGB-110401 MGB-115519 3rd PREFIX GROUP - Compression and serial number { 18GG/*/8701 not available H - High compression { Serial number of unit Engine No | (USA) 18GH/*/22209 not available L - Low compression } | (USA) 18GJ/*/22647 not available } 18V/*/101 on CODE EXAMPLE Car No G-HN5-187211 MGB Commission No G-23N-28507F 18G U H 101 Serial number Roadster Commission No (USA) GU-23N-28927F High compression (G-HN5) { (except USA) MGB-115520 MGB120000 Centre gear change | (except USA 1800cc MG Body | and No | Sweden) MGB-120001 18V 581F L 101 Serial number | USA) MGB-U-23185 Low compression } (Sweden) GBSN-004001 Carburettor crankcase Ventilation and twin carburettors *Engine code No. inserted here Bf Pf We 1800cc Vertical (in line) Centre gear change - all synchromesh Alternator Pre-engaged starter Always quote these prefixes with engine serial numbers. Vehicle Identification Serial Number Prefix Letter Code (not V8) The car number prefix comprises a series of letters and numbers presenting in code the make, engine type and the series. MGB GT (Not V8) Identification Data 1st PREFIX LETTER 2nd PREFIX LETTER 3rd PREFIX LETTER NAME ENGINE TYPE BODY TYPE MODEL COMMENCING FINISHING G-MG H N-2 Seater Roadster MGB Engine No 18GB/*/101 18GB/*/91200 D-Coupé or GT GT Car No G-HD3-71933 G-HD3-139471 (G-HD3) Body No GBD-101 GBD-21777 4th PREFIX 5th PREFIX 6th PREFIX - MODEL YEAR { 18GD/*/101 18GD/*/7000 3 - 3 series L - LHD A - 1970 Engine No | 18GG/*/101 18GG/*/8482 4 - 4th series U - USA B - 1971 MGB | (USA) 18GF/*/101 18GF/*/13650 5 - 5th series C - 1972 GT } (USA) 18GH/*/101 18GH/*/20289 D - 1973 (G-HD4) Car No G-HD4-139472 G-HD4-187840 E - 1974 Commission No G23D-101P G23D-17179P Commission No (USA) GU23D-101P GU23D-17190P CODE EXAMPLE Body No GBD-22001 G- HN3L Serial number { 18GG/*/8483 not available LHD Engine No. | (USA) 18GH/*/20290 not available 3rd Series | (USA) 18GJ/*/12647 not available Tourer } 18V/*/101 on ‘B’ type Engine MGB Car No G-HD5-187841 MG GT Commission No G-23D-17180Z (G-HD5) Commission No (USA) G-23D-17191Z G- HD5UD Serial number { (except USA) GBD-29008 GBD-040000 1973 | (except USA) USA Body | and 5th Series No | Sweden) GBD-040001 GT | (USA) GBUD-510523 ‘B’ type Engine } (Sweden) GBSD-000301 MG *Engine code No inserted here Always quote these prefixes with car serial numbers. Bristol 0117 923 2523 Manchester 0161 480 6402 TECHNICAL ADVICE 15 Vehicle Identification Numbering (VIN) From No. 501001 Onwards The VIN system replaced the earlier car numbering system from the introduction of the 1980 model year. Thus G V A D J 1 A G - 501001 is an MGB Home Market spec, open bodied, 1800cc RHD 1980 model. 1st & 2nd Prefix Letters 3rd Prefix Letter 4th Prefix Letter 5th Prefix Letter (marque + model) (Class) (body) (engine) GV-MGB A - Base Line D - 2 Door Sports Open J – 1800cc G - GT E - 2 Door Sports Closed 6th Prefix Number J - Japanese (transmission & steering) L - Canadian 8th Prefix Number 7th Prefix Number 1 – Manual 4 speed RHD V - North America (assembly plant) (model change) 2 – Manual 4 speed LHD Z - California G - Abingdon A - 1980 model year Location Of Unit Numbers The Car Number is stamped on a plate secured to the The Body Number is stamped on a plate secured to the The Engine Number is stamped on a plate secured to the left-hand wing valance forward of the radiator. righthand front valance behind the radiator diaphragm. right-hand side of the cylinder block. The Gearbox Number is stamped on the top of the The Overdrive Unit Number is stamped on the solenoid The Rear Axle Number is stamped on the front of the axle gearbox casing adjacent to the dipstick. side cover on the righthand side of the unit. tube on the lefthand side adjacent to the spring seat. Moss Customer No. Chassis/Car No. Engine No. Ignition Key No. Boot Key No. Door Key No. Reg. No. General Information twitter.com/mosseurope facebook.com/mosseurope for latest prices visit moss-europe.co.uk 16 PARTS INDEX moss-europe.co.uk London 020 8867 2020 Bradford 01274 539 999 Note: These pages list only the major items in Bump Stop, (Front) . .Page 68 E Headlining, (GT) . .Page 95 each area, such as body work, electrical and Bump Stop, (Rear) . .Page 71 Heater . .Page 90 brake components. Bumper, (Front/Chrome) . .Page 115 Electrical Switches, 1962-71 . .Page 88 Heater Control Cables, 1962-76 . .Page 90 In many cases minor fittings, clamps and Bumper, (Front/Rubber) . .Page 115 Electrical Switches, 1972-76 . .Page 89 Heater Control Cables, 1976 on . .Page 90 linkages etc... are not shown. In most Bumper, (Rear/Chrome) . .Page 116 Electrical Switches, 1976 on . .Page 89 Heater Control Knobs, 1962-76 . .Page 90 circumstances Moss can supply both an OE Bumper, (Rear/Rubber) . .Page 116 Engine, (3 Main Bearing) . .Page 19 Heater Control Knobs, 1976 on . .Page 90 (Original Equipment) part or an aftermarket Engine, (5 Main Bearing) . .Page 22 Heater Control Valve . .Page 91 part. The aftermarket part offers a high quality C Engine Backplate, (3 Main Bearing) .Page 20 Heater Hoses . .Page 91 part but usually at a reduced price and in Engine Backplate, (5 Main Bearing) .Page 24 Heater Matrix . .Page 90 certain circumstances replaces the OE part Cam Follower, (3 Main Bearing) . .Page 19 Engine Breather Valve & Pipes . .Page 54 Heater Motor . .Page 90 when no longer available. Cam Follower, (5 Main Bearing) . .Page 22 Engine Front Plate, (3 Main Bearing) .Page 20 Hood Fittings . .Page 121 Camshaft, (3 Main Bearing) . .Page 19 Engine Front Plate, (5 Main Bearing) .Page 24 Hood Frame . .Page 121 The aftermarket part is indicated by a letter Camshaft, (5 Main Bearing) . .Page 22 Engine Gasket Sets, (3 Main Bearing) . .Page 19 Hood Cover . .Page 120 “Z” at the end of the part number. Carburettor Heat Shield . .Page 54 Engine Gasket Sets, (5 main Bearing) . .Page 22 Horn Push, 1962-72 . .Page 67 Carburettor Jets, (HS4 Carburettors) .Page 49 Engine Mountings . .Page 30 Horn Push, 1972 on . .Page 66 A Carburettor Jets, (HIF Carburettors) .Page 50 Exhaust Manifold . .Page 54 Horn Units . .Page 84 Carburettors HS4 . .Page 49 Exhaust/Inlet Manifold Gasket . .Page 54 Hub, (Front) . .Page 69 Accelerator Cable, HS4 To 1973 . .Page 51 Carburettors HIF4 . .Page 50 Exhaust Manifold Studs & Nuts, (3 m/b) .Page 21 Hub, (Rear), (Banjo Axle) . .Page 72 Accelerator Cable, HIF 1973-74 . .Page 52 Chassis Plates . .Page 119 Exhaust Manifold Studs & Nuts, (5 m/b) .Page 26 Hub, (Rear), (Tube Axle) . .Page 74 Accelerator Cable, HIF 1975 on . .Page 53 Choke Cable, HS4 To-1973 . .Page 51 Exhaust Mountings & Clamps . .Page 55 Hub Bearing Kit, (Banjo Axle) . .Page 72 Accelerator Pedal, HS4 To 1973 . .Page 51 Choke Cable, HIF 1973-74 . .Page 52 Exhaust Systems . .Page 55 Hub Bearing Kit, (Tube Axle) . .Page 94 Accelerator Pedal, HIF 1973-74 . .Page 52 Choke Cable, HIF 1975 on . .Page 53 Exhaust Valves, (3 Main Bearing) . .Page 21 Hub Caps . .Page 56 Accelerator Pedal, HIF 1975 on . .Page 53 Cigarette Lighter, 1962-71 . .Page 88 Exhaust valves, (5 Main Bearing) . .Page 26 Air Filter . .Page 54 Cigarette Lighter, 1972-76 . .Page 88 Expansion Tank, 1976 on . .Page 33 I Air Intake Grille . .Page 91 Cigarette Lighter, 1976 on . .Page 89 Air Vents, 1972-76 . .Page 92 Clutch Cover . .Page 35 F Ignition Leads . .Page 79 Air Vents, 1976 on . .Page 93 Clutch Fork, (3 Synchro) . .Page 36 Ignition Switch, 1962-71 . .Page 88 Alternator . .Page 76 Clutch Fork, (4 Synchro) . .Page 40 Fascia Crash Rail, 1962-73 . .Page 93 Ignition Switch, 1972-76 . .Page 79 Alternator Adjusting Link . .Page 76 Clutch Master Cylinder . .Page 34 Fascia Crash Rail, 1973-76 . .Page 93 Ignition Switch, 1976 on . .Page 79 Alternator Pulley & Fan . .Page 76 Clutch Pedal . .Page 59 Fascia Crash Rail, 1976 on . .Page 93 Indicator Assy. (Front/Chr/Bumper) . .Page 82 Ancillary Gauges, 1962-76 . .Page 86 Clutch Pipes . .Page 34 Fan Belt . .Page 32 Indicator Assy. (Front/Rub/Bumper) . .Page 82 Ancillary Gauges, 1976 on . .Page 87 Clutch Plate . .Page 35 Fan Blade, (Mechanical Fan) . .Page 32 Inlet Manifold . .Page 54 Anti Roll Bar, (Front) . .Page 70 Clutch Push Rod . .Page 35 Fan Guard, (Electric fan) . .Page 33 Inlet Valves, (3 Main Bearing) . .Page 21 Anti Roll Bar, (Rear) .