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Engine Fuel Pistons
Engine Number = prefix cc A / A+ Leaded/UnLeaded Flat/Dished Circlip/inteferance Notes
*** H - High Compression
*** L - Low Compression
85H 101 850 A L F C 1969 on
8A 850 A L F C Austin up to 25000
8AC 850 A L F C Moke
8AH 850 A L F C Austin/Morris automatic
8AJ 850 A L F C Austin/Morris closed circuit breathing
8AK 850 A L F C Austin/Morris auto with closed circuit = breathing
8AM 850 A L F C Austin/Morris 25000 on
8MB 850 A L F C Morris up to 25000
8WR 850 A L F C Wolseley Hornet, Riley Elf
9AD 998 A L F C Austin, Wolseley Hornet/Riley MKII with remote = gearbox,=20 closed circuit breathing
9AE 998 A L F C Wolseley Hornet/Riley Elf MKIII
9WR 998 A L F C Wolseley Hornet/Riley Elf MKII pre closed circuit=20 breathing
99H - 101 = --> 998 A L D C Wolseley/Riley Mini Clubman, Mini 1000cc 1970 on = MKIII
99H 791 998 A L D C Mini 1974 on 
99H 907P 998 A+ L F C Metro, 9.6:1CR, A series Main caps
99H 962P 998 A+ L F C 3.44 FD, 9.6:1CR (Slimer)
99H 997 = --> 127421 998 A+ L F C 2.95 FD, A series Main caps
99H 997 = 127422 --> 998 A+ L F C 2.9 FD
99H A06 --> 08 998 A+ L F I Metro, 10.3:1CR
99H A53P 998 A+ L F I
99H A64P 998 A+ L F I Metro, 8.3:1CR
99H A65 --> 66 998 A+ L F I Metro, 10.3:1CR
99H A67P 998 A+ L F I Metro, 9.6:1CR
99H A68 --> 69 998 A+ L F I Metro, 8.3:1CR
99H A70P 998 A+ L F I Metro, 10.3:1CR
99H A71P 998 A+ L F I Metro, 9.6:1CR
99H A75P 998 A+ L F I Metro, 10.3:1CR
99H A97P 998 A+ L D C 3.44 FD, A Series Main caps, A series Gearset, 12"=20 wheels
99H B38P 998 A+ L F I Metro, 9.6:1CR
99H B39P 998 A+ L F I Metro, 8.3:1CR
99H B81 = --> 127431 998 A+ L F C
99H B81 = 127432 --> 998 A+ L F I
99H B83P --> = 102908 998 A+ L D C
99H B84P --> = 100216 998 A+ L D C
99H B87 --> 89 998 A+ L F I Metro, 9.6:1CR
99H B90 --> 93 998 A+ L F I Metro, 10.3:1CR
99H B94 --> 95 998 A+ L F I Metro, 9.6:1CR
99H B96 --> 99 998 A+ L F I Metro, 8.3:1CR
99H C20 = --> 105023 998 A+ L F C
99H C20 = 105024 --> 998 A+ L F I
99H D27 --> 31 998 A+ L F I Metro, 10.3:1CR
99H D30P --> 31P 998 A+ L F I Metro, 9.6:1CR
99H D32 --> 35 998 A+ L F I Metro, 8.3:1CR
99H D80 998 A+ L F I
99H D81 998 A+ UL F I
99H D83P 102909 = --> 998 A+ UL D I
99H D84P 100217 = --> 998 A+ UL D I
99H E20 998 A+ UL F I
99H E21 998 A+ UL F I
99H E22 998 A+ UL D I
99H E35 998 A+ UL F I Metro, 9.6:1CR
99H E38 --> 39 998 A+ UL F I Metro, 8.3:1CR
">99H = E67=20 -->  998 A+ UL F I Metro, 9.6:1CR
99H F15 998 A+ UL F I
99H F16 998 A+ UL F I
99H G30 998 A+ UL F I
99H G31 998 A+ UL D I
99H G32 998 A+ UL F I
99H G33 998 A+ UL F I
LBB10089 998 A+ UL F I
LBB10175 998 A+ UL D I
10AMW Ta 1098 A L n/a n/a Clubman Estate & Austin 1100 (ADO16)
10GR Ta H 1098 A L n/a n/a MG 1100
10GRB Ta H 1098 A L n/a n/a MG 1100 Wolseley 1100cc
10H - H 1098 A L n/a n/a All Austin 1100cc 2/4 door derivatives saloons = (ADO16)
10H791 1098 A L n/a n/a Clubman Saloon
10V Ta H 1098 A L n/a n/a Vanden Plas 1100cc
12G Ta H 1275 A L D I 1275 'S' rods Wolseley/MG/Riley/VP1300(ADO16)
12H = -   1275 A L D I Allegro, Austin 1300cc
12H 354 E 1275 A L D I Austin 1300, solid wall block, 9 stud head (minimanclive)
12H 379 1275 A L D I 1275GT, dynamo, neg. earth, electric fuel pump
12H 380 1275 A L D I 1275GT, alternator, electric fuel pump, remote = gearbox
12H = 389  1275 A L D I 1275GT, dynamo, mechanical pump, remote = gearbox
12H = 390  1275 A L D I 1275GT, alternator, mechanical pump, remote = gearbox
12H 397 1275 A L D I Cooper 'S' MKIII, Dynamo, neg. earth, EN16 = tuftrided=20 crank
12H = 398  1275 A L D I Cooper 'S' MKIII, Alternator, EN16 tuftrided = crank
  1275 A L D I Innocenti Mini with Duplex timing gear, 11 Stud = Head
12H = 706  1275 A L D I 1275GT, alternator, mechanical pump, rod = change
12H 719 & 832 1275 A L D I Innocenti Mini with Simplex timing gear, 11 Stud = Head
12H 996AA 1275 A+ L D I MG Metro
12H A08 1275 A+ L D I Metro HLE
12H A42AA 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H A60 --> 72 1275 A+ L D I Metro, 9.75:1CR
12H A73 1275 A+ L D I Metro, 8.0:1CR
12H A80 1275 A+ L D I Metro, 9.75:1CR
12H A83 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H A84 1275 A+ L D I Metro, 8.0:1CR
12H A86 --> 87 1275 A+ L D I Metro, 9.75:1CR
12H B09 --> 37 1275 A+ L D I Metro, 9.75:1CR
12H B37 1275 A+ L D I Metro, 8.0:1CR
12H B42 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H C01 --> 11 1275 A+ L D I Metro, 9.75:1CR
12H C14 --> 15 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H C17 --> 19 1275 A+ L D I Metro, 8.0:1CR
12H D09 --> 15 1275 A+ L D I Metro, 9.75:1CR
12H D16 1275 A+ L D I Metro Van 9.75:1 CR (possibly with low 3.6 FD)
12H D17 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H D18 --> 20 1275 A+ L D I Metro, 8.0:1CR
12H D21 --> 23 1275 A+ L D I Metro, 9.75:1CR
12H D24 --> 25 1275 A+ L D I MG Metro & VDP, 10.5:1CR
12H D26 1275 A+ L D I MG Metro Turbo
12H E24 --> 25 1275 A+ UL D I Metro, 9.4:1CR
12H E41 --> 42 1275 A+ UL D I Metro, 8.0:1CR
12H E48 --> 73 1275 A+ UL D I Metro, 9.4:1CR
12H F 1275 A+ UL D I Metro, 10.0:1CR
12H F01 1275 A+ UL D I MG Metro Turbo & MG Metro
12H F02 1275 A+ UL D I Metro Gta & Sport
12A 2A 1275 A+ UL n/a n/a 1990 on, Carb
12A 2B 1275 A+ UL n/a n/a 1990 on, Carb, Cat
12A 2D 1275 A+ UL n/a n/a TBI fuel injection 9.4CR
12A = 2E  1275 A+ UL n/a n/a TBI fuel injection 10.1CR
12A 2EF53 1275 A+ UL n/a n/a 10.1CR, 3.1 FD, Cat, Oil cooler
12A 2EF75 1275 A+ UL n/a n/a 9.4CR, TBI, 3.1 FD, non open loop Cat
12A 2EF76 1275 A+ UL n/a n/a 9.4CR, Auto, non open loop Cat
12A 2EF77 1275 A+ UL n/a n/a 10.1CR, = TBI Cooper,=20 3.2 FD, non open loop Cat 
12A 2EG01 1275 A+ UL n/a n/a 10.1CR, 3.1 FD, Cat, no oil cooler
12A 2EG03 1275 A+ UL n/a n/a 9.4CR, 2.76 FD, Cat, May 1992 on
12A 2EG04 1275 A+ UL n/a n/a 9.4CR, 2.76 FD, Cat, France only
12A 2EG05 1275 A+ UL n/a n/a 9.4CR, Auto, Cat
99H - H 998 A L n/a n/a Last of production (1969)
9F Sa H 101 --> = 26376 997 A L n/a n/a Cooper 'S' 997
9F Sa H 19201 --> = 20410 1071 A L n/a n/a Cooper 'S' 1071
9F Sa H 26501 --> = 33660 1071 A L n/a n/a Cooper 'S' 1071
9F Sa X 29001 --> = 29038 970 A L n/a n/a Cooper 'S' 970 Tecalemit filter
= 30029 ">9F=20 Sa X 29039 --> 30029  970 A L n/a n/a Cooper 'S' 970 Purolator filter with switch
9F Sa Y 31001--> = 31405 1275 A L n/a n/a Cooper 'S' 1275, pre closed circuit breathing, = Purolator=20 filter
= ">9F Sa Y=20 32378 -->  1275 A L n/a n/a Cooper 'S' 1275, Closed circuit breathing, = Purolator filter=20 with oil switch, piston change
= ">9F Sa Y=20 40006 -->  1275 A L n/a n/a Cooper 'S' 1275, AEG510 camshaft introduced
= ">9F Sa Y=20 42548 -->  1275 A L n/a n/a Cooper 'S' 1275, Metal dipstick & tube = introduced
= ">9F Sa Y=20 42730 -->  1275 A L n/a n/a Cooper 'S' 1275, Crossdrilled EN40B crank = introduced
9FA Sa H 998 A L n/a n/a Austin Cooper MKI pre closed circuit breathing
9FD Sa H 998 A L n/a n/a Austin Cooper MKII closed circuit breathing
9FD Sa H --> 1934 998 A L n/a n/a Morris Cooper MKI closed circuit breathing
9FD Sa H 1935 --> = 33660 998 A L n/a n/a Morris Cooper MKII closed circuit breathing
9FD Sa H 33661 --> = 33948 1071 A L n/a n/a Cooper 'S' 1071, Closed circuit breathing, oil = switch=20 filter
9FD Sa = X  970 A L n/a n/a Cooper 'S' 970 Closed circuit breathing introduced, = Tecalemit filter
9FD Sa Y --> 32177 1275 A L n/a n/a Cooper 'S' 1275, Closed circuit breathing
9FD Sa Y 32178 --> 1275 A L n/a n/a Cooper 'S' 1275, Closed circuit breathing, Oil = switch on=20 filter
9FD Xe H 998 A L n/a n/a Austin/Morris Cooper MKII, 4 synchro gearset.
9FE Sa X 970 A L n/a n/a Cooper 'S' 970 Closed circuit breathing, filter = with oil=20 switch introduced
9FE Sa Y 1275 A L n/a n/a Cooper 'S' 1275, Closed circuit breathing, = Purolator filter=20 with oil switch, piston change