Engine Identification Numbers
850CC
8A Austin upto 25000
8MB Morris upto 25000
8AM Austin/Morris 25000 on
8AH Austin/Morris automatic
8AJ Austin/Morris closed circuit breathing
8AK Austin/Morris auto with closed circuit breathing
8WR Wolseley Hornet/ Riley Elf
8AC Moke
85H/101 1969 on
On 850cc the 3rd Suffix letter 'L' or 'H' denotes low or high compression, eg 8AML or 8AMH
998 MINI
9WR/ Wolseley Hornet/ Riley Elf MKII pre closed circuit breather
9AD/ Austin, Wolseley Hornet/ Riley Elf MKII with remote gearbox, closed circuit breather
9AE/ Wolseley Hornet/ Riley Elf MKII
99H/-/101 on Wolseley/ Riley Mini Clubman, Mini 1000cc 1970 in MKII dished piston
99H/791 Dished piston - Mini 1974 on
99H/997 A Plus block 1982 on flat top piston, economy 2.95 ratio
Dished Piston with Circlip Type Gudgeon Pin
99H/A97P A plus, dished, A plus gears, engine 100101 on, 3.44 final drive, 12 wheels
99H/B83P to engine 102908 - 3.4 final drive
99H/B84P to engine 100216 - 3.4 final drive
Dished Piston with Press Fit Gudgeon Pin
99H/D83P from engine 1001010 - 3.4 final drive
99H/B83P from engine 102909 - 3.4 final drive
99H/B84P from engine 100217 - 3.4 final drive
Dished Piston with Press Fit Gudgeon Pin (Lead Free)
99H/G31 3.4 final drive
99H/E22 3.4 final drive
LBB10175
998 A Plus Block with Centre Locating Groove on Maincap 1985 on
Flat Top Piston with Circlip Type Gudgeon Pin
99H/B81 to engine 127431 - 3.1 final drive
99H/C20 to engine 105023 - 3.1 final drive
99H/997 from engine 127422, 2.9 final drive economy
99H/A53P 3.1 final drive
Flat Top Piston with Press Fit Gudgeon Pin
99H/B81-B82 from engine 127432 - 3.1 final drive
99H/C20 from engine 105024 - 3.1 final drive
99H/D80 from engine 100101 on - 3.1 final drive
Flat Top Piston with Press Fit Gudgeon Pin (Lead Free)
99H/G30/G32/G33 3.1 final drive
99H/F15/16 F15 - 3.1 final drive & F16 - 3.4 final drive
99H/E20/E21 3.1 final drive
99H/D81-D82 3.1 final drive
LBB10089 Lead free 1988 on replacement engine
1100CC
10AMW/Ta Clubman Estate plus Austin 1100 (ADO16)
10H791 Clubman Saloon
10H/-/H All Austin 1100cc 2/4 Door derivatives Saloons (ADO16)
10GR/Ta/H MG1100
10GRB/Ta/H MG1100/ Wolseley 1100cc
10V/Ta/H
1275CC With Solid Wall Block
12G/Ta/H 1275 'S' rods Wolseley/MG/Riley/VP130 (ADO16)
12H379 1275GT, dynamo, neg.earth, electric fuel pump
12H380 1275GT, alternator, electric fuel pump, remote gearbox
12H389 1275GT, dynamo, mechanical pump, remote gearbox
12H390 1275GT, alternator, mechanical pump, remote gearbox
12H706 1275GT, alternator, mechanical pump, rod change
12H/-/ 1275, Alegro, Austin 1300cc
12H610/635 Innocenti Mini with Duplex, 11 stud head
12H719/832 Innocenti Mini with Simplex, 11 stud head
12H/4/A Austin Allegro, 1973 - 1980
997 Cooper
9F/Sa/H 101 to 26376 (except 19201 to 20410, which became 1070)
998 Cooper (January 1964 on)
9Fa/Sa/H MK1 Austin pre closed circuit breather
9FD/Sa/H MK1 Morris up to engine no. 1934, all Austin MKII closed circuit breathing
9FD/Sa/H Morris MKII from engine number 1935 - 33660, closed circuit breathing
9FD/Xe/H 4 Synchro gearbox introduced
99H/-/H Last of manufacture 1969
Cooper 'S' Variants to 1971
970CC
9F/Sa/X 29001-29003 Tecalemit filter
9FD/Sa/X Closed circuit breathing introduced, Tecalemit filter
9FE/Sa/X Closed circuit, filter with oil switch introduced
9F/Sa/X 29039-30029 Purolator filter with switch, closed circuit breathing
1070CC
9F/Sa/H 26501 to 33660 plus 19201 to 20410
9FD/Sa/H 33661 to 33948 closed circuit breating with oil switch filter
1275CC
9F/Sa/Y 31001 to 31405 pre closed circuit breathing, Purolator filter
9FD/Sa/Y Closed circuit breathing, oil switch on filter after 32178
9FE/Sa/Y Closed circuit breathing, Purolator filter with oil switch, piston change
9F/Sa/Y 32378 on, Closed circuit, Purolator filter with oil switch. AEG510 camshaft introduced at 40,006. Cross drilled EN406 crank at 42,730, metal dipstick and tube, 42548 on.
12H397 MK3 'S' with dynamo EN16 crank - tuftrided
12H398 MK3 'S' with alternator EN16 crank - tuftrided
Only Cooper 'S' with 9F prefix engines had EN40B forged steel nitrided crankshafts. All other A series used EN16 material which was only tuftrided on MK3 'S' and 1300GT (ADO16) with 12G1683 stamping number on crank.
12HD26 ERA Turbo 'T' stamped on heater take off
1275, 1990 On 12A
12A/2A Carburettor
12A/2B Carburettor and catalyst
12A/2D TBI fuel injection 9.4CR - France 2.76 final drive
12A/2E TBI fuel injection 10.1
Following suffix:
G01 10.1CR, 3.1 final drive/ catalyst, no oil cooler - Mainstream Cooper - CAM6648 cam shaft
G03 9.4CR, 3.1 final drive/ catalyst, May 1992 on
G04 9.4CR, 2.76 final drive/ catalyst, France only
G05 9.4CR, Auto/ catalyst
F53 10.1CR, 3.1 final drive/ with oil cooler - (non open loop catalyst) - Rover Special Products (RSP) - CAM6648 cam
F75 9.4CR, TBI, 3.1 final drive - Non Cooper SPI
F76 9.4CR, Auto (non open loop catalyst) - Non Cooper
F77 10.1CR, SPI Cooper, 3.2 final drive, (non open loop catalyst)
J01 9.4CR, SPI, 3.2 final drive
J02 10.1CR, SPI, 3.2 final drive
J03 9.4CR, Automatic
J04 9.4CR, Carb 3-1 final drive open loop catalyst
J05 9.4CR, Carb 2.76 final drive open loop catalyst - France
J77 10.1CR Monte Carlo 3.2 FD
J92 9.4CR France 2.76 FD
12A/2LK70 MPI 2.76 final drive
12A/2EK70 MPI Japan spec with aircon 10-1 compression ratio
12A/2EK71 SPI Japan spec with aircon 10-1 compression ration 3.2 FD
12A/2EK72 MPI Japan spec with aircon 9.4 compression ratio