Engine number reference on factory Replacement
Engine Number Reference on Factory Replacement Manual Units
8G28 Oil feed to primary gear crank,1.375"tall 850cc
8G35 Dvea conversion crank, 1.375" tall 850cc
8G45 Gold seal, 1.5" diameter tall 850cc
GSE1101E Gold Seal 850cc
RKM1101E Silver Seal 850cc
BHM1307E Gold Seal 85H Prefix replacement 850cc
8G18 Oil feed to primary gear crankshaft 997cc Cooper
8G36 Oil feed converter crankshaft and primary gear 997cc Cooper
8G29 Deva bush 997cc Cooper
8G33 Fitted with 28G193 cylinder head (12G202) 997cc Cooper
8G40 28G222 (12G295) cylinder head introduced
997cc Cooper
8G42 Closed circuit breathing rocker cover/sideplates 997cc Cooper
8G49 Purolator oil filter pressure switch introduced 997cc Cooper
GSE1103E Gold seal, was RKM1120E silver seal 997cc Cooper
RKM1103E Silver Seal 997cc Cooper
8G156E Mini and Austin 110 (ADO16) 1100cc Clubman and Special
RKM1150E Mini Clubman seiver seal unit 1100cc Clubman and Special
RKM1151E Mini Clubman seiver seal unit 1100cc Clubman and Special
BHM1042 New and gold seal 1974 to 1980 1100cc Clubman and Special
BHM1229 New and gold seal A plus block 1980 on 1100cc Clubman and Special
8G57 998 new from 1969 and exchange for all pre A plus 998cc Mini pre A plus to 1981
GSE1102E Gold seal, was PKM1119E 998cc Mini pre A plus to 1981
RKM1102E Silver seal 998cc Mini pre A plus to 1981
RKM1119E Silver seal, replaced by RKM1102E 998cc Mini pre A plus to 1981
BHM1232 LC piston/ CAM6267 cam, early cylinder head crank 998cc Mini A plus
BHM1377 HC piston/ CAM4717 cam, early cylinder head crank 998cc Mini A plus
BHM1458 LC piston/ CAM6267 cam, late A plus mains cylinder head 998cc Mini A plus
BHM1460 HC piston/ CAM4717 cam, late A plus mains cylinder head 998cc Mini A plus pre fit pin piston introduced
BHM1460 Low compression Lead free 998cc Mini A plus pre fit pin piston
LBC10175N LC lead free/ CAM6267 cam, late A plus mains cylinder head 998cc Mini A plus pre fit pin piston
8G200 New and gold seal Mini 1275GT
38G527 New and gold seal for 12H706/707/831 Mini 1275GT
RKM1130E Silver seal, was RKM1112E Mini 1275GT
RKM1152E Silver seal Mini 1275GT
RKM1112E Silver seal Mini 1275GT
BHM1220 'A' Plus Mini 1275GT
8G199E Gold seal, with duplex 1300GT Innocenti Mini, 11 Stud cyl head
38G559E Gold seal, with simplex, 12H719/832 1300GT Innocenti Mini, 11 Stud cyl head
GSE1109E Gold seal 1300GT Innocenti Mini, 11 Stud cyl head
RKM1133E Silver seal 1300GT Innocenti Mini, 11 Stud cyl head
BHM1209E Gold seal, replaced all Innocenti 12H610/635/719/832 1300GT Innocenti Mini, 11 Stud cyl head
8G38 Gold seal, pre-closed circuit breathing 970cc
8G41 Closed circuit breathing sideplate introduced 970cc
8G46 Gold seal oil filter with pressure switch 970cc
8G133 Gold seal, pre-closed circuit breathing 1070cc 'S'
8G153 Closed circuit breathing sideplate introduced 1070cc 'S'
8G145 Pre-closed circuit breathing 1275cc
8G154 Closed circuit breathing sideplate introduced 1275cc
8G155 oil filter with pressure switch introduced 1275cc
8G174 Fitted with AEG510 cam 1275cc
38G464 Introduced in 1970 most with EN16 crank 1275cc
LBB10399N F53/GO1 HC, CAM6648 CAM,HIF6 carb 21253 pistons,3-1 final drive 1275cc
LBB10467N F77 LGC10230 CAM 8cc dish single point injection 10-1cr,3-2 final drive 1275cc
LBB10477N F75 LGC10231 cam 9.4-1 cr, single point 3-1 final drive 1275cc
LBB10479N G03/G04 LGC10231 cam HIF38 carb 1275cc
All engines with prefix GSE or RKM are reconditioned units sold on an exchange basis and of Unipart origin when BL split its parts organization.

GSE engines were Gold seal and were painted a yellowish gold
RKM were Silver seal a budget version less a few ancillaries, painted silver.
BHM followed by E after the numbers were also gold for Gold seal
BHM followed by N after the numbers were black and brand new
 
Metro Engine Replacement Manual Units
BHM1666E Standard Metro leaded petrol -
BHM1667E MG Metro leaded petrol -
BHM1668E MG Metro -
XAP45N Unleaded Metro -
LBB10248N Unleaded Metro -