The MGA With An Attitude
TWIN CAM Confidential Service Memoranda - TC-120

This section contains all known memos issued by BMC Service Ltd to MG dealers from 1958 to 1963, detailing actions to be taken when servicing the MGA Twin Cam. These are PDF files averaging 73KB per file. Thanks to Mick Anderson, Sydney, AU, for scanning these pages.

Viewing of these files requires Adobe Acrobat Reader to be installed on your computer. The program is available free of charge from For best viewing select size option of 100% up to 150%. For printing, select the print option "Fit to page".

distributor mounting
See also MGA Confidential Service Memoranda in the Care And Feeding section
* - Applicable to all MGA not specific to Twin Cam

Index to Improvements and Alterations February 1961 (450-KB pdf file)

 Date  CSM no Subject Matter      
22Oct58 MG231 Connecting rod assemblies
11Oct58 MG234 Water loss
05Dec58 MG236 Connecting rod assemblies (Cancels MG231)
05Dec58 MG237 Oil pump & strainer, Petrol pipe clips, Fan belt dynamo pulley *
_______ MG237A Fan belt dynamo pulley (Corrected)
13Feb59 MG238 Fuel octane requirements
06Feb59 MG240 Front spring spigot, piston scraper rings, oil pump drive spindle *
13Apr59 MG248 Distributor clamping
17Apr59 MG249 Battery covers *

28Apr59 MG251 Fitting camshaft bearing caps
29Apr59 MG252 Connecting rod assemblies (Cancels MG236)
13May59 MG253 Improved Road Wheels, Tappets, sparking plugs *
16Jun59 MG257 Timing cover gasket
03Jul59 MG262 Important modifications - Connecting rods
24Jul59 MG264 Carburetter damper piston

27Aug59 MG275 Crankshaft, flywheel and clutch assemblies
15Sep59 MG276 Tappet clearance
15Sep59 MG278 Important modifications - Axle shafts, anti-roll bar assembly, piston rings *
16Oct59 MG282 Remedies for possible complaints
10Nov59 MG286 Air cleaner venturi
13Nov59 MG288 Remedies for possible complaints (Cancels MG282)
06Jan60 MG294 Hood folding - Oil level indicator *
28Jan60 MG296 Piston failure
10Feb60 MG297 Gearbox front cover centraliser *

24Feb60 MG301 Campaign change of distributor
23Mar60 MG307 Piston rings
25Mar60 MG309 Main and connecting rod bearings *
30Mar60 MG310 Valve springs
16Aug60 MG325 Piston Failure
18Oct60 MG332 Disc brake pads *
22Nov60 MG338 Hard top and sliding sidescreens *

04Jan61 MG342 Control box (Cancels MG324) *
19Jan61 MG344 Piston failure (Cancels MG325)
24Mar61 MG358 Scratches on flexible back-lights * (see Top - TT-106)
17Nov61 MG385 Seat belts *
02Jul62 MG398 Windscreen re-glazing (convertibles only) *
01Mar62 MG416 Crankshaft thrust washers *

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