Oil Pump, Oil Pressure Relief Valve and Dipsticks

Mini Catalog Page 2-35
No. Part No. Description Qty Remarks
0 BLS916  Ball bearing, use with AEA536 1 Alternative to valve  
1 GLP110 Oil pump slot drive turbo 1 MG Turbo  
1 GLP110MS  Oil pump slot drive turbo 1 Aftermarket  
1 GLP138 Oil pump slot drive 1 A-Plus 1300cc  
1 C-AEG412  Sureflow slot drive 1 A-Plus 1300cc  
1 GLP139  Oil pump slot drive small bore 1 A-Plus except 1300cc  
1 C-AEG413  Sureflow slot drive small bore 1 A-Plus 998cc  
2 GLP141 Oil pump star drive (2 bolt fitting) 1275cc 1 Hoburn Eaton  
2 C-AEG411  Sureflow oil pump star drive 4 bolt fitting 1275cc 1  
3 GLP142 Oil pump pin drive, 850/998/1000cc 1  
3 C-AEG414  Sureflow pin drive except 1275cc and 'S' 1  
3 C-AEG410  Sureflow oil pump pin drive was AEG410 1  
4 GLP107  Automatic oil pump was 12G796 1 Pre 'A' plus  
4 GLP113  Automatic oil pump was 12A1979 1 'A' plus  
5 TAM1174 Oil pump bolt was BH604131 A/R Sureflow, all Hoburn Eaton
5 BH604140 Oil pump bolt A/R Concentric and GLP110
6 12G730B  Oil pump gasket 1 Was 88G411  
6 GUG705560GM Oil pump gasket , genuine 1  
7 12G926  Locktab for pin drive pumps 1  
7 12G2097  Locktab for spider type pump (Long) 1 Concentric type only  
7 12G2098  Locktab for spider type pump (Short) 1 Concentric type only  
8 12H865  Valve oil release 1  
  BLS916 Ball bearing, use with AEA536 1 Alternative to Valve
9 6K653  Oil valve spring 1 60lb  
9 AEA536  Oil valve spring 1 65lb  
10 6K431  Copper washer 1  
11 12A1851  Nut cap 1  
12 12A116  Dipstick (also use when 12G107 is fitted) 1 850cc with no tube  
13 12G107  Dipstick tube, nylon (use 12A116 with nylon tube) 1 CWE  
13 12A1261  Dipstick tube, metal (use LQM100380 with metal tube) 1 NLA  
14 AEC671  Dipstick seal for 12A116 1  
15 12A263  Dipstick 1 1275 & A-Plus  
16 6K464  Washer for oil priming hole 1 When applicable  
17 2A797  Oil pressure relief seating in block 1  

Pin drive pumps fitted to early Minis and 'S' had the same internals, the shaft on the 'S' was longer to accommodate the block. Sureflow pumps do not give higher oil pressure, but maintain constant pressure under arduous use, such as race or rallying.