External Engine - 998 and 1098cc

Part No: LWZ204
  In Stock
WASHER-SPRING, 1/4''
Required Quantity: 6
£0.22 inc VAT
£0.18 ex VAT
Part No: PWZ104
  In Stock
WASHER-PLAIN - 1/4" x 9/16" O.D.
Required Quantity: 6/3
£0.30 inc VAT
£0.25 ex VAT
Part No: SH604061
  In Stock
SET SCREW-1/4'' UNF x 3/4''
Required Quantity: 3
£0.25 inc VAT
£0.21 ex VAT
Part No: LWZ205
  In Stock
WASHER-SPRING, 5/16''
Required Quantity: 2
£0.37 inc VAT
£0.31 ex VAT
Part No: SH605051
  In Stock
SET SCREW- 5/16 UNF x 5/8''
Required Quantity: 2
£0.38 inc VAT
£0.32 ex VAT
Part No: FNZ105
  In Stock
NUT - 5/16" UNF
Required Quantity: 2
£0.35 inc VAT
£0.29 ex VAT
Part No: PWZ105
  In Stock
WASHER - PLAIN - 5/16"
Required Quantity: 4
£0.20 inc VAT
£0.17 ex VAT
Part No: LWZ404
  In Stock
Original fixing method.
£0.16 inc VAT
£0.13 ex VAT
Part No: SH605061
  In Stock
SET SCREW-5/16'' UNF x 3/4''
Required Quantity: 5
£0.41 inc VAT
£0.34 ex VAT
Part No: LWZ305
  No Longer Available
USE: LWZ205
Required Quantity: 5
£0.00 inc VAT
£0.00 ex VAT
Part No: SH604031
  In Stock
SET SCREW- 1/4'' UNF x 3/8''
Required Quantity: 6
£0.47 inc VAT
£0.39 ex VAT
Part No: ADP210
  In Stock
3 points earn (£0.03)
£4.08 inc VAT
£3.40 ex VAT
Part No: 1B3664
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£0.25 inc VAT
£0.21 ex VAT
Part No: 12A1136
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Part No: 12A1139
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USE: 12A1175
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Part No: 12A116
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Part No: 12A1176
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1 points earn (£0.01)
£1.37 inc VAT
£1.14 ex VAT
Part No: 12A1177
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£1.19 inc VAT
£0.99 ex VAT
Part No: 12A1212
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Part No: 12A1261
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Part No: 12A1262
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Part No: 12A1263
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Part No: 12A1386
  Available to Customer Order
4 points earn (£0.04)
£5.64 inc VAT
£4.70 ex VAT
Part No: 12A1851
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CAP-OIL PRESSURE RELIEF VALVE
Required Quantity: 1
3 points earn (£0.03)
£4.50 inc VAT
£3.75 ex VAT
Part No: 12A1910
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3 points earn (£0.03)
£4.75 inc VAT
£3.96 ex VAT
Part No: 12A666
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£0.00 inc VAT
£0.00 ex VAT
Part No: 12A956
  In Stock
1 points earn (£0.01)
£1.54 inc VAT
£1.28 ex VAT
Part No: 12G1058
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WASHER-SEALING
Required Quantity: 2
£0.00 inc VAT
£0.00 ex VAT
Part No: 12G107
  In Stock
 
6 points earn (£0.06)
£8.20 inc VAT
£6.83 ex VAT
Part No: 12G2506
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Part No: 12G2626
  Available to Customer Order
44 points earn (£0.44)
£53.71 inc VAT
£44.76 ex VAT
Part No: 12G3503
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PLUG-OIL GALLERY-'85 ON
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3 points earn (£0.03)
£4.24 inc VAT
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Part No: 12G577
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Part No: 12H1734
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Part No: 12H865
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Part No: 12H941
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Part No: 13H2792
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Part No: 1A1964
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Part No: 22A1203
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Part No: 2A265
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3 points earn (£0.03)
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Part No: 2A54
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1 points earn (£0.01)
£1.20 inc VAT
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Part No: 2A612
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USE: 12A1136
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Part No: 2A797
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12 points earn (£0.12)
£15.48 inc VAT
£12.90 ex VAT
Part No: 2A970
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Part No: 2K1345
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Part No: 2K4954B
  In Stock
WASHER-FIBRE 1/2'' I.D. x 11/16''
Required Quantity: As required
£0.32 inc VAT
£0.27 ex VAT
Part No: 2K4994
  In Stock
2 points earn (£0.02)
£2.64 inc VAT
£2.20 ex VAT
Part No: 2K8169
  In Stock
£1.01 inc VAT
£0.84 ex VAT
Part No: 3H576
  In Stock
17 points earn (£0.17)
£21.34 inc VAT
£17.78 ex VAT
Part No: 53K2016
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USE: SH604051
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Part No: 53K2853
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5 points earn (£0.05)
£7.14 inc VAT
£5.95 ex VAT
Part No: 53K615
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USE: CAM151
Required Quantity: 2
£0.00 inc VAT
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Part No: 6K431
  In Stock
£0.90 inc VAT
£0.75 ex VAT
Part No: 6K464
  In Stock
WASHER-COPPER-FOLDED 1/8 BSP
Required Quantity: 1
£0.70 inc VAT
£0.58 ex VAT
Part No: 6K638B
  In Stock
£0.79 inc VAT
£0.66 ex VAT
Part No: 6K831
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USE: LWZ404 x 2
Required Quantity: 1
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Part No: 6K853
  In Stock
1 points earn (£0.01)
£1.32 inc VAT
£1.10 ex VAT
Part No: 6K927
  In Stock
LOCK TAB-MAINS CAP-NOT 1275cc
Required Quantity: 6
 
£1.14 inc VAT
£0.95 ex VAT
Part No: 88G402
  In Stock
£0.36 inc VAT
£0.30 ex VAT
Part No: 88G561
  In Stock
1 points earn (£0.01)
£1.88 inc VAT
£1.57 ex VAT
Part No: AEA536
  In Stock
 
1 points earn (£0.01)
£1.32 inc VAT
£1.10 ex VAT
Part No: AEC671
  In Stock
1 points earn (£0.01)
£1.64 inc VAT
£1.37 ex VAT
Part No: AEC876
  In Stock
1 points earn (£0.01)
£1.44 inc VAT
£1.20 ex VAT
Part No: AHU2379
  In Stock
PLATE-CAMSHAFT LOCATING
Required Quantity: 1
6 points earn (£0.06)
£7.80 inc VAT
£6.50 ex VAT
Part No: BH605151
  In Stock
BOLT-5/16'' UNF x 1 7/8''
Required Quantity: 1
£0.62 inc VAT
£0.52 ex VAT
Part No: BHM1211
  In Stock
8 points earn (£0.08)
£9.64 inc VAT
£8.03 ex VAT
Part No: BLS916
  In Stock
£1.02 inc VAT
£0.85 ex VAT
Part No: CAM150
  In Stock
3 points earn (£0.03)
£4.22 inc VAT
£3.52 ex VAT
Part No: CAM151
  In Stock
2 points earn (£0.02)
£2.83 inc VAT
£2.36 ex VAT
Part No: CAM4133
  No Longer Available
USE: 12G3503
Required Quantity: 2
£0.00 inc VAT
£0.00 ex VAT
Part No: CAM4641
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£0.00 inc VAT
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Part No: CAM4904
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: CHS2513
  In Stock
STUD-5/16 UNF/UNC x 1 5/8''
Required Quantity: 2
£0.91 inc VAT
£0.76 ex VAT
Part No: CHS2515
  In Stock
STUD-5/16 UNF/UNC x 1 7/8''
Required Quantity: 2
£1.19 inc VAT
£0.99 ex VAT
Part No: CHS2613
  In Stock
STUD-3/8 UNF/UNC x 1 5/8''
Required Quantity: 2
1 points earn (£0.01)
£1.54 inc VAT
£1.28 ex VAT
Part No: EGS001
  In Stock
21 points earn (£0.21)
£25.54 inc VAT
£21.28 ex VAT
Part No: GEG254
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£0.00 inc VAT
£0.00 ex VAT
Part No: GUG49
  In Stock
11 points earn (£0.11)
£13.80 inc VAT
£11.50 ex VAT
Part No: GUG705505GM
  In Stock
1 points earn (£0.01)
£1.32 inc VAT
£1.10 ex VAT
Part No: GUG705554GM
  In Stock
GASKET-TIMING BACK PLATE-A+
Required Quantity: 1
1 points earn (£0.01)
£1.86 inc VAT
£1.55 ex VAT
Part No: GUG705557GM
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USE: GUG705779GM
Required Quantity: 1
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Part No: MRC1980A
  In Stock
1 points earn (£0.01)
£1.97 inc VAT
£1.64 ex VAT
Part No: SH506071
  In Stock
SET SCREW-3/8 UNC x 7/8''
Required Quantity: 2
£0.65 inc VAT
£0.54 ex VAT
Part No: SH605091
  In Stock
SET SCREW-5/16 UNF x 1 1/8''
Required Quantity: 1
£0.72 inc VAT
£0.60 ex VAT
Part No: TAM2009
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Part No: WF600040
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USE: LWZ404
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Part No: WF600041
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USE: LWZ404
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Part No: LVQ10035
  In Stock
 
22 points earn (£0.22)
£27.13 inc VAT
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Part No: 2K4958
  In Stock
£0.35 inc VAT
£0.29 ex VAT
Part No: GUG705550GM
  In Stock
1 points earn (£0.01)
£2.16 inc VAT
£1.80 ex VAT
Part No: 12G619B
  In Stock
1 points earn (£0.01)
£1.86 inc VAT
£1.55 ex VAT
998 and 1098cc Engine Identification     
The 998cc A Series engine first saw Mini use in the Riley Elf and Wolseley Hornet Mk II models, introduced in early 1963.  By the end of 1963 they had been joined by the 998cc Mini Cooper, which replaced the 997cc Cooper after a short production overlap.  1967 saw the first use of a 998cc engine in a 'standard' Mini, the Mini Mk II 1000.  This model, in both manual and automatic gearbox versions and a wide range of trim levels and names, continued in production right the way through to 1992.  As with the 848cc engine, 998cc engines used with automatic gearboxes are different in several respects to those used with manual.  The Mini Clubman and Clubman Estate shared the Mini 1000's power unit until 1975, after which date the manual Clubmans received the 1098cc A Series (automatics continued with 998cc, there being no automatic type 1098cc engine).  When in 1980 the Clubman saloon was dropped, the Estate continued for a further two years, rebadged 'HL' and reverting to 998cc in manual versions.  
         
For 1981 the 998cc A Series engine was relaunched in A Plus specification, in readiness for what was envisaged as a new and prosperous life in the Austin Metro (the Mini wasn't expected to last much longer by then!).  The A Plus engine is most easily identified by the reinforcement ribs on the engine block casting; these ribs are missing on the much smoother casting of the pre-A Plus unit.  However, just to confuse the issue, the A Plus components were actually introduced gradually between 1979 and 1981, which means that many 'hybrid' engines were built at that time.  The Metro, overseas-built Mini Mokes and the very short-lived Allegro 3 are the only BMC/Leyland/Austin Rover vehicles to share the use of the 998cc engine with the Mini.
         
The 1098cc engine appeared in home market Minis for the first time in the aforementioned Clubman in 1975.  The only other UK-built Mini to receive the engine was the Special (1100) of 1979, a limited edition celebrating the 20th anniversary of Mini production.  The Special was heavily based on a similar Mini produced for several years in Belgium for mainland European markets, which also used the same engine.  Through the 1970s and early 1980s Europe consistently made far more use of the 1098cc A Series in Minis than was the case in the UK.
         
In common with the 848 and 998cc A Series engines, the 1098cc unit received a pad type timing chain tensioner for 1979, with the tell-tale bulge on the timing cover. Not being destined for use in the forthcoming Austin Metro, the 1098cc engine was not scheduled for the full 1981 A Plus improvement scheme; certain A Plus parts still had to be used from the start of the 1980s however because they were shared with 998cc engine production.  The most obvious - and biggest - example of this was the adoption of the A Plus ribbed cylinder block.  The best known of other 1098cc A Series applications was without doubt the best-selling BMC ADO16 range (Austin/Morris 1100, MG 1100, etc.).  It is very possible if your Mini has received a 1098cc upgrade that the engine started life in one of these cars, especially one of the very nice twin carburetter versions.  The only other transverse applications of the engine were overseas-built Mokes (again) and more basic trim level Austin Allegros.  Non-transverse applications were legion (Morris Minor, MG Midget, etc.) but are of no consequence here: the engines cannot be adapted to sit on a Mini gearbox.  
         
Engine serial number prefix codes are important in identifying what you have in your car and establishing which replacement parts to fit to it.  The 998 and 1098cc engine number prefixes used on Mini engines are listed here for that reason.  The engine serial number is stamped on a plate affixed to the cylinder head mating face or 'deck' of the cylinder block, at the front of the engine towards the right hand side, as you look at the engine in the car.  Note that the last code letter before the serial number itself on pre-A Plus engines relates to the compression ratio of the engine: H for high compression, L for low compression. A Plus high or low compression engines are by contrast identified by the letter plus two digits part of the engine serial number prefix, a full list of these is shown below.
         
Factory reconditioned engines always lost their serial numbers in favour of an engine number plate stamped with the appropriate part number for the intended application for each engine.  In the absence of an engine serial number on a factory reconditioned unit, this is the only means of identification - but beware! Factory reconditioned engines were more often than not built up with whatever suitable components were to hand; for example, new parts were usually plucked from the engine production line and were therefore of the latest design.  Reused components came from stocks of parts which would do the same job, but were not necessarily the same design, all lumped together.  In other words, parts used in the rebuild were frequently incorrect in a historic sense for the engine being rebuilt.  
         
998cc Wolseley and Riley Engine Serial Number Prefix Codes 1963-67    
9WR/ Manual gearbox (direct change) engines (1963-64)    
9AD/ Manual gearbox (remote change) engines without closed circuit breathing (1964-67)  
9AE/ Manual gearbox (remote change) engines with closed circuit breathing (1964-67)  
9AG/ Automatic gearbox engines without closed circuit breathing (1966-67)    
9AJ/ Automatic gearbox engines with closed circuit breathing (1966-67)    
         
998cc Cooper Engine Serial Number Prefix Codes 1963-69    
9FA/SA Manual gearbox (3 Synchro) engine without closed circuit breathing (1963-64)    
9FD/SA Manual gearbox (3 Synchro) engine with closed circuit breathing (1964-68)    
9FD/XE Manual gearbox (4 Synchro) engine with closed circuit breathing (1968-69)    
99H/377CH Manual gearbox (4 Synchro) engine with closed circuit breathing and dynamo (1969)  
99H/378CH Manual gearbox (4 Synchro) engine with closed circuit breathing and alternator (1969)  
         
998cc Wolseley and Riley Engine Serial Number Prefix Codes 1967-69    
998cc Austin and Morris Engine Serial Number Prefix Codes 1967-69    
998cc Mini Engine Serial Number Prefix Codes 1969-92    
1098cc Mini Engine Serial Number Prefix Codes 1975-81    
99H/ 998cc engines (1967-92)    
10H/ 1098cc engines (1975-81)    
With the advent of 99H/ and 10H/ serial numbers, the codes became far more complex.  99H/ or 10H/ was followed by a three character code, either three digits (issued from 1967-81), or a letter and two digits (1982 onwards).  There were not many variations in the Mini 1098cc engine and most have an engine number beginning 10H/791.  Engines with A Plus features started to appear around 10H/791/180000, and the A Plus block was in use by 10H/791/217000. Unfortunately there are too many combinations of 99H/ codes to list in the space available here, but if you contact Somerford Mini with your full engine number we can 'unpick' the codes to tell you exactly what specification your engine was built to.  We can however give you two important developments later in the life of the 998cc engine denoted by the codes, which mostly ran chronologically in numerical (and from 1982 alpha-numerical) order:
99H/791/431856  Introduction of A Plus cylinder block (plus some engine numbers intermittently for a short period beforehand; 1980-90) 
99H/997  Earliest code denoting complete A Plus specification engine (introduced 1980/81)  
         
Additionally, it is helpful to know which A Plus 998cc engines are high (10.3:1) or low (8.3:1) compression ratio, and which are lead-free engines: 
High Compression Ratio: 99H/997, 998, A53, A94, A98, B81, B82, C20, D80, D82     
Low Compression Ratio: 99H/A19, A97, A99, B83, B84, B85, D83    
Lead-Free High Compression Ratio: 99H/D81, E20, E21, F15, F16, F32, G30, G32, G33, G34, G39     
Lead-Free Low Compression Ratio: 99H/960, A99, E22, G31        
         
BMC/Leyland/Unipart/Rover Mini 998cc Manual (not Cooper) Reconditioned Engine Part Numbers  
8G31 998cc Wolseley and Riley manual gearbox engine (1963-67; replaced by 8G51)  
8G47 998cc Wolseley and Riley manual gearbox engine (1963-67; replaced by 8G51)  
8G51 998cc Wolseley and Riley manual gearbox engine (1963-67)    
8G56 998cc Austin, Morris, Wolseley and Riley manual gearbox engine (1967-69)    
8G57 998cc Austin, Morris, Wolseley and Riley manual gearbox engine (1967-80)    
GSE1102 998cc manual gearbox engine; later 'Gold Seal' part number. Specification as 8G57 (1967-80)
RKM1102 998cc manual gearbox engine; later 'Silver Seal' part number. Specification as 8G57 (1967-80)
RKM1119 998cc manual gearbox engine; later 'Silver Seal' part number. Specification as 8G57; replaced RKM1102 (1967-80)
8G63 998cc manual gearbox engine, Canada (1972-75)    
BHM1061 998cc manual gearbox engine, Canada, Sweden and Japan (1975-80)    
BHM1232 998cc A Plus manual gearbox engine, low compression (1980-85)     
BHM1377 998cc A Plus manual gearbox engine, high compression (1980-85)     
BHM1233 998cc A Plus manual gearbox engine, Japan (1980-85)    
BHM1458 998cc A Plus manual gearbox engine, low compression (1985 on)     
BHM1460 998cc A Plus manual gearbox engine, high compression (1985 on)     
LBB10175 998cc A Plus manual gearbox engine, low compression, lead free (1988 on)     
LBB10089 998cc A Plus manual gearbox engine, high compression, lead free (1988 on)     
         
BMC/Leyland/Unipart Mini 998cc Manual (Cooper) Reconditioned Engine Part Numbers  
8G33 998cc high compression, without closed circuit breathing, 12G206 cylinder head casting (1963)
8G34 998cc low compression, without closed circuit breathing, 12G206 cylinder head casting (1963)
8G40 998cc high compression, without closed circuit breathing, 12G295 cylinder head casting (1964)
8G39 998cc low compression, without closed circuit breathing, 12G295 cylinder head casting (1964)
8G42 998cc high compression, with closed circuit breathing, 12G295 cylinder head casting (1964)
8G43 998cc low compression, with closed circuit breathing, 12G295 cylinder head casting (1964)
8G49 998cc high compression, with closed circuit breathing, 12G295 cylinder head casting, warning light type oil filter head (1964-69)
8G48 998cc low compression, with closed circuit breathing, 12G295 cylinder head casting, warning light type oil filter head (1964-69)
GSE1103 998cc high compression engine; later 'Gold Seal' part number.  Specification approximately as 8G49 (1964-69)
RKM1103 998cc high compression engine; later 'Silver Seal' part number.  Specification approximately as 8G49 (1964-69)
RKM1120 998cc high compression engine; later 'Silver Seal' part number.  Specification approximately as 8G49; replaced RKM1103 (1964-69)
         
BMC/Leyland/Unipart/Rover Mini 998cc Automatic Reconditioned Engine Part Numbers  
8G58 998cc Austin, Morris, Wolseley and Riley automatic gearbox engine (1967-69)    
8G59 998cc Austin, Morris, Wolseley and Riley automatic gearbox engine (1967-80)    
BHM1041 998cc Austin and Morris automatic gearbox engine (1974-80)    
BHM1235 998cc A Plus automatic gearbox engine, low compression (1980-85)    
BHM1378 998cc A Plus automatic gearbox engine, high compression (1980-85)    
BHM1461 998cc A Plus automatic gearbox engine, high compression (1985 on)     
LBB10088 998cc A Plus automatic gearbox engine, high compression, lead free (1985 on)   
LBB10176 998cc A Plus automatic gearbox engine, low compression, lead free (1985 on)   
         
BMC/Leyland/Unipart Mini 1098cc Reconditioned Engine Part Numbers    
BHM1042 1098cc manual gearbox engine, 'Gold Seal' (1975-80)    
RKM1150 1098cc manual gearbox engine, 'Silver Seal' (1975-80)    
BHM1229 1098cc manual gearbox engine with A Plus cylinder block, 'Gold Seal' (1980-81)  
RKM1151 1098cc manual gearbox engine with A Plus cylinder block, 'Silver Seal' (1980-81)  
         
Note that where no differentiation is made between open circuit or closed circuit breathing, or between dynamo or alternator fitment, the factory instructed that the parts concerned (rocker cover, tappet cover, pulley etc.) should be swapped over from the old engine to the new one as required.  
         
Rebuilt or Repaired 998 and 1098cc Engine Assemblies  
Somerford Mini Ltd. offers an engine rebuilding and repair service, courtesy of its workshop facility.  We can carry out repairs or rebuilds on late-model engines, but the extent of rebuilding on an early engine is governed by - and sometimes restricted by - parts availability. Please contact us to discuss your Mini engine requirements - it would be helpful if you could supply us not only the details of what's gone wrong with your engine, but also the full engine number (if known) and type (capacity, high or low compression, gearbox, breathing system, etc.).  The more you can provide us with, the better we can ascertain how we might possibly help you.
         
Gasket Sets      
Ill. No. Part No. Description Qty. Rqd. Remarks
1 GUG49 GASKET SET, conversion ('bottom end set') 1 Manual gearbox models.
  GEG254 GASKET SET, conversion ('bottom end set') 1 1967-79, automatic gearbox models.
  LVQ10035 GASKET SET, conversion ('bottom end set') 1 1979 on, automatic gearbox models.
Conversion gasket sets (often called 'bottom end' or 'supplementary' sets) include gaskets for the following: water pump, front cover, tappet chest covers, front mounting plate, oil pump, oil filter head, engine to gearbox joint and flywheel/torque converter housing.  Washers, seals and O rings are included for the following: priming plug, drain tap/plug, main bearing cap, front cover, tappet chest covers, distributor housing and oil suction pipe.  Note that the tappet chest cover gaskets included are the post-1966 rubber type - customers requiring the earlier cork gaskets should purchase them separately.
  EGS001 GASKET SET, full engine 1 Manual gearbox models.
The full engine gasket set includes the conversion gasket set listed above plus a cylinder head gasket set ('decoke' or 'decarbonising' set) minus the head gasket itself, which should be purchased separately according to the engine size. 
         
External Engine Components    
Ill. No. Part No. Description Qty. Rqd. Remarks
2 2K8169 PLUG, core (welch), cylinder block, 1 5/8" dia. 4 1963-80.  
  AEC876 PLUG, core (welch), cylinder block, 1 3/8" dia. 4 1980 on (A Plus block).
3 2K1345 PLUG, oil pressure release valve passage 2 1963-85.
  TAM2009 PLUG, oil pressure release valve passage 2 1985 on.
4 12H1734 PLUG, oil gallery, solid brass 2 1963-85, 998cc. 
  CAM4133 PLUG, oil gallery, cup type 2 1985 on, 998cc. 
  12G3503 PLUG, oil gallery 2 1098cc.
5 ADP210 PLUG, oil feed 1 Automatic gearbox.
6 1B3664 WASHER, sealing 1 Automatic gearbox.
7 1A1964 RESTRICTOR, cam bearing oil feed 1  
8 CAM150 STUD, cylinder head, long 4  
9 CAM151 STUD, cylinder head, short 5  
10 CHS2513 STUD, fuel pump drive aperture 2 1963-69.
  CHS2515 STUD, fuel pump drive aperture 2 1969 on.
From 1963-69 the fuel pump drive aperture studs secured a blanking plate, plus the open circuit breathing vent pipe (if fitted).  From 1969 onwards, they secured the mechanical fuel pump.  For mechanical fuel pump fixing details, including the gasket (which is not the same as the blanking plate gasket), please see the 'Fuel Pumps - Carburetter' section in the Fuel and Exhaust Systems area of the Somerford Mini Catalogue.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
11 2A265 PLATE, blanking fuel pump drive aperture 1 1963-69.
12 GUG705557GM GASKET, blanking plate 1 1963-69.
13 FNZ105 NUT, blanking plate to block 2 1963-69.
14 LWZ205 WASHER, locking 2 1963-69.
15 PWZ105 WASHER, plain 1 Required for open circuit breathing vent pipe bracket (if fitted).
16 53K615 STUD, oil filter head 2 Manual gearbox, 1963-73.  For paper element oil filters. 
  CHS2613 STUD, oil filter head 2 Manual gearbox, 1973 on.  For 'spin on' cartridge oil filters. 
17 22A1203 PLATE, blanking cylinder block oil filter face 1 Automatic gearbox.
18 88G402 GASKET, blanking plate 1 Automatic gearbox.
19 SH506071 SCREW, blanking plate to block 2 Automatic gearbox.
20 12G1058 WASHER, sealing 2 Automatic gearbox.
21 12A1910 SCREW, main bearing cap to block 6  
22 2A54 DOWEL, main bearing cap 6  
23 6K927 LOCK TAB, main bearing cap screw 6  
24 BHM1211 LINER SET, camshaft bearings 1  
25 3H576 TAP, cooling system drain 1 Alternative to plug; fitted up to early 1980s.
26 2K4954B WASHER, fibre, drain tap A/R  
This washer not only seals the tap to the block, but also is intended (using whatever quantity is necessary) to shim the tap so that when tightly screwed to the block the spout faces downwards.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
27 53K2853 PLUG, cooling system drain 1 Alternative to tap; fitted throughout production.
28 6K638B WASHER, sealing plug 1  
29 2A612 HOUSING, distributor 1 1963-65; does not require O ring.
30 12A1136 HOUSING, distributor 1 1965 on; requires O ring.
31 13H2792 O RING, housing 1 1965 on.
The later 12A1136 distributor housing may be fitted in place of the earlier 2A612 housing, but only if a 13H2792 O ring is fitted with it.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
32 SH604061 SCREW, housing to block 2 1963-80; not A Plus cylinder block.
33 LWZ404 WASHER, shakeproof 2 1963-80; not A Plus cylinder block.
         
Engine Front Mounting Plate    
Ill. No. Part No. Description Qty. Rqd. Remarks
34 2A970 PLATE, engine front mounting 1 1963-79.
35 12G2626 PLATE, engine front mounting 1 1979 on.  Accepts chain tensioner.
36 12G619B GASKET, plate to block 1 1963-79.
  GUG705554GM GASKET, plate to block 1 1979 on.  Accepts chain tensioner.
37 SH605051 SCREW, plate to block 2  
38 LWZ305 WASHER, locking 2  
39 53K2016 SCREW, plate to main bearing cap 2  
40 6K831 LOCK TAB, screw 1 1963-69.
41 WF600041 WASHER, shakeproof 2 1969 on.  Will replace lock tab on earlier engines.
42 AHU2379 PLATE, camshaft locating 1  
43 SH604061 SCREW, plate to block 3  
44 WF600040 WASHER, shakeproof 3  
         
Timing Cover 1963-79 (without chain tensioner pad)    
Several timing covers were fitted in the 1960s, some with timing pointers, some without, most with stiffeners, one without.  All were superseded by 1970 by 12G2506, which includes a timing pointer and lower stiffener and does not require the stiffener 12A666 listed below. The plain washers PWZ104 and PWZ105 listed below replace the original elongated washers used at different times on the A Series engine until the 1980s.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
45 12G2506 COVER, front, timing 1 Includes oil seal.
46 88G561 OIL SEAL, timing cover 1 Included in timing cover.
47 12A666 STIFFENER, timing cover 1 Use on early 1960s covers suffering from poor sealing.
48 12A956 GASKET, timing cover 1  
49 SH604031 SCREW, timing cover to front mounting plate 6  
50 LWZ204 WASHER, locking 6  
51 PWZ104 WASHER, plain 6/3 Qty. reduced when stiffener is present.
52 SH605061 SCREW, timing cover to mounting plate and block 4  
53 LWZ305 WASHER, locking 4  
54 PWZ105 WASHER, plain 4/3 Qty. reduced when stiffener is present.
         
Timing Cover 1979 On (with chain tensioner pad)    
Ill. No. Part No. Description Qty. Rqd. Remarks
55 CAM4641 COVER, front, timing, accepts chain tensioner pad 1 1979-80; includes oil seal.
  CAM4904 COVER, front, timing, accepts chain tensioner pad 1 1980 on; includes oil seal.  A Plus type.
56 88G561 OIL SEAL, timing cover 1 Included in timing cover.
57 GUG705550GM GASKET, timing cover 1  
58 SH604031 SCREW, timing cover to front mounting plate 6  
59 LWZ204 WASHER, locking 6  
60 PWZ104 WASHER, plain 6  
61 SH605061 SCREW, timing cover to mounting plate and block 5  
62 LWZ305 WASHER, locking 5  
63 PWZ105 WASHER, plain 5  
64 FNZ105 NUT, timing cover to mounting plate 1  
         
Tappet Chest Covers      
Ill. No. Part No. Description Qty. Rqd. Remarks
65      - COVER, tappet chest, LH, with breather pipe 1 Convex cover; for open circuit breathing (1963-66).
66      - COVER, tappet chest, LH, with breather pipe 1 Concave cover; for open circuit breathing (1966-69).
67 12G577 COVER, tappet chest, LH, with oil separator 1 Convex cover; for closed circuit breathing (1964-66).
68 12A1212 COVER, tappet chest, LH, with oil separator 1 Concave cover; for closed circuit breathing (1966 on).
There are too many varieties of LH tappet chest cover for open circuit engine breathing models to list here.  However they are all detailed, along with all of the other components of each type of breathing system, in the 'Emission Controls - Engine Breathing' sections in the Fuel and Exhaust Systems area of the Somerford Mini catalogue.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
69 12H941 COVER, tappet chest, RH 1 Convex cover, 1963-66.
70 12A1386 COVER, tappet chest, RH 1 Concave cover, 1966 on.
71 12A1139 GASKET, cover, cork 1 For convex type cover.
72 BH605151 BOLT, cover to block 1 For convex type cover.
73 2K4958 WASHER, bolt 1 For convex type cover.
74 GUG705505GM GASKET, cover, rubber 1 For concave type cover.
75 SH605091 SCREW, cover to block 1 For concave type cover.
76 12A1177 WASHER, cup 1 For concave type cover; 1963-85.
77 12A1176 BUSH, rubber 1 For concave type cover; 1963-85.
78 MRC1980A BUSH, rubber 1 For concave type cover; 1985 on. 
The MRC1980A bush is commonly fitted in place of the 12A1177 washer and 12A1176 bush on pre-1985 engines.
         
Oil System Components      
Ill. No. Part No. Description Qty. Rqd. Remarks
79 2K4994 PLUG, priming 1  
80 6K464 WASHER, sealing 1  
81 12H865 PLUNGER, oil pressure relief valve 1 Standard fitment.
82 BLS916 BALL, oil pressure relief valve 1 Alternative; see note below.
The ball above may be used in place of the standard fitment plunger to guard against a sticking relief valve (something that the plunger is prone to do, given dirt or metal particles in the oil).  It must, however, be used in conjunction with the shorter and stronger AEA536 spring.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
83 6K853 SPRING, oil pressure relief valve 1 Not 998cc Cooper.
  AEA536 SPRING, oil pressure relief valve 1 998cc Cooper.
84 12A1851 CAP, threaded, relief valve 1  
85 6K431 WASHER, sealing 1  
86 2A797 HOUSING, oil pressure relief valve 1 Press-fit in cylinder block.
87 12A116 DIPSTICK, oil level 1 1963-66; manual gearbox.
  12A1263 DIPSTICK, oil level 1 1966 on; manual gearbox.
88 AEC671 WASHER, sealing dipstick 1 1963-66; manual gearbox.
  12A1262 WASHER, sealing dipstick 1 1966 on; manual gearbox.
89 12G107 TUBE, dipstick, nylon 1 1963-66; manual gearbox.
  12A1261 TUBE, dipstick, metal 1 1966-80; manual gearbox.  Not A Plus engines (see note below).
Note that 'hybrid' engines (with A Plus cylinder block, but not all other A Plus features) produced in the 1979-81 period also did not require a dipstick tube. For the dipstick on Minis with automatic gearboxes, please see the 'Automatic Transmission - Torque Converter and Housing' section in the Transmissions area of the Somerford Mini catalogue.
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