External Engine - 848 and 997cc

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: 4/3
£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
  In Stock
£0.25 inc VAT
£0.21 ex VAT
Part No: 12A1136
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A1139
  No Longer Available
USE: 12A1175
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A116
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A1176
  In Stock
1 points earn (£0.01)
£1.37 inc VAT
£1.14 ex VAT
Part No: 12A1177
  In Stock
£1.19 inc VAT
£0.99 ex VAT
Part No: 12A1212
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A1386
  Available to Customer Order
4 points earn (£0.04)
£5.64 inc VAT
£4.70 ex VAT
Part No: 12A1851
  Currently Unavailable
CAP-OIL PRESSURE RELIEF VALVE
Required Quantity: 1
3 points earn (£0.03)
£4.50 inc VAT
£3.75 ex VAT
Part No: 12A1910
  Currently Unavailable
3 points earn (£0.03)
£4.75 inc VAT
£3.96 ex VAT
Part No: 12A666
  No Longer Available
£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
  No Longer Available
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
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 12G2626
  Available to Customer Order
44 points earn (£0.44)
£53.71 inc VAT
£44.76 ex VAT
Part No: 12G3503
  In Stock
PLUG-OIL GALLERY-'85 ON
Required Quantity: 2
3 points earn (£0.03)
£4.24 inc VAT
£3.53 ex VAT
Part No: 12G577
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 12H865
  In Stock
2 points earn (£0.02)
£3.00 inc VAT
£2.50 ex VAT
Part No: 12H941
  No Longer Available
USE: 12A1386
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 13H2792
  Currently Unavailable
£1.02 inc VAT
£0.85 ex VAT
Part No: 1A1964
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 22A1203
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 2A265
  In Stock
3 points earn (£0.03)
£4.03 inc VAT
£3.36 ex VAT
Part No: 2A52
  Currently Unavailable
BEARING-CAMSHAFT-850cc
Required Quantity: 1
 
9 points earn (£0.09)
£11.59 inc VAT
£9.66 ex VAT
Part No: 2A54
  Currently Unavailable
1 points earn (£0.01)
£1.20 inc VAT
£1.00 ex VAT
Part No: 2A612
  No Longer Available
USE: 12A1136
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 2A797
  Available to Customer Order
12 points earn (£0.12)
£15.48 inc VAT
£12.90 ex VAT
Part No: 2A970
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 2K1345
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
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
  No Longer Available
USE: SH604051
Required Quantity: 2
£0.00 inc VAT
£0.00 ex VAT
Part No: 53K2853
  In Stock
5 points earn (£0.05)
£7.14 inc VAT
£5.95 ex VAT
Part No: 53K615
  No Longer Available
USE: CAM151
Required Quantity: 2
£0.00 inc VAT
£0.00 ex VAT
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
  No Longer Available
USE: LWZ404 x 2
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
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: 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: CAM4641
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
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
  No Longer Available
£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
  No Longer Available
USE: GUG705779GM
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
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: WF600040
  No Longer Available
USE: LWZ404
Required Quantity: 3
£0.00 inc VAT
£0.00 ex VAT
Part No: WF600041
  No Longer Available
USE: LWZ404
Required Quantity: 2
£0.00 inc VAT
£0.00 ex VAT
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
No. Part No. Description Qty. Remarks
         
848 and 997cc Engine Identification

The 848cc A Series engine was the original engine in the Mini when the car was launched in 1959.  It continued in production until the cessation of the Mini Van, the last batches of which made it to commercial fleet operators in early 1984.  Like other Mini engines that continued in production after the 1970s, the 848cc engine received a timing chain tensioner pad  at the end of that decade. 

However it never got the strengthened cylinder block or the other 'A Plus' modifications wrought on the 998, 1098 and 1275cc engines - the 998 (which shared its block with the 1098) and 1275cc engines being scheduled to have much longer production lives in the Austin Metro. 1980s 848cc engines can therefore only be easily identified by a bulge in the timing chain cover, giving away the fact that there is a chain tensioner pad assembly inside.  848cc engines used with automatic gearboxes are different in several respects to those used with manual; 848cc automatics ceased production in 1971.

In fact, the only other BMC/Leyland vehicles to use the 848cc engine were the Mini Moke, a handful of early 1980s Metro Vans and the final batch of Austin A35 Vans built as AA patrol vans in 1968!  The latter was the only non-transverse 848cc A Series engine type ever produced, incidentally, while it would be very unlikely indeed for you to find one of the other two transplanted into your Mini.

The 997cc A Series engine is most closely related to the 848cc unit from which it was directly developed (which is why it is included with the 848cc engine in sections of this catalogue).  It only saw use in one model of Mini, the first incarnation of Mini Cooper, and was produced from 1961 to 1963.  The only other application of note for a 997cc A Series was in John Cooper's 'Formula Junior' racing cars, from which most of the components were borrowed for the Mini Cooper.

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 848 and 997cc 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 always relates to the compression ratio of the engine: H for high compression, L for low compression.

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. 

848 and 997cc Engine Serial Number Prefix Codes 1959-69

  8A/ 848cc Austin manual gearbox engines only up to engine no. 25000 (1959-60)
  8MB/ 848cc Morris manual gearbox engines only up to engine no. 25000 (1959-60)
  8MB/ 848cc Morris manual gearbox engines only up to engine no. 25000 (1959-60)
  8AM/ 848cc Austin and Morris manual gearbox engines without closed circuit breathing from engine no. 25001 (1960-69)
  8AH/ 848cc Austin and Morris automatic gearbox engines without closed circuit breathing (1964-69)
  8AJ/ 848cc Austin and Morris manual gearbox engines with closed circuit breathing (1964-69)
  8AK/ 848cc Austin and Morris automatic gearbox engines with closed circuit breathing (1964-69)
  8WR/ 848cc Wolseley and Riley manual gearbox engines (1961-63)
  9F/SA 997cc Austin and Morris Cooper manual gearbox engines (1961-63)
         
848cc Engine Serial Number Prefix Codes 1969-84    
  85H/ Engines from 1969 onwards    
         
With the advent of 85H/ serial numbers in 1969, the codes became far more complex.  85H/ was followed by a three digit number and either one or two letters. The number referred to the transmission fitted (manual/automatic, type of gearchange, type of drive shaft joints, final drive ratio etc.), the charging system fitted (dynamo or alternator), plus any unusual specifications (Police, Post Office or other utility users, export market specific requirements).  The one or two letters following the three digit number referred to emission controls fitted (type of crankcase ventilation, air intake system, evaporative loss control, etc.).  Unfortunately with regard to the 848cc engine there are too many combinations of 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.

BMC/Leyland/Unipart Mini 848 and 997cc Reconditioned Engine Part Numbers

  8G13 848cc manual gearbox engine, with 1 3/8" tail diameter type crankshaft accepting oil-fed primary gear bush (1959-62; replaces D.U. bush type)
  8G28 848cc manual gearbox engine, with 1 3/8" tail diameter type crankshaft for Deva primary gear bush (1962-63)
  8G35 848cc manual gearbox engine, with 1 1/2" tail diameter type crankshaft for Deva primary gear bush and warning light type oil filter head (1964-67)
  8G45 848cc manual gearbox engine, with 1 1/2" tail diameter type crankshaft for Deva primary gear bush and non-warning light type oil filter head (1964-80)
  GSE1101 848cc manual gearbox engine; later 'Gold Seal' part number.  Specification as 8G45 (1964-80)
  RKM1101 848cc manual gearbox engine; later 'Silver Seal' part number.  Specification as 8G45 (1964-80)
  RKM1118 848cc manual gearbox engine; later 'Silver Seal' part number.  Specification as 8G45; replaced RKM1101 (1964-80)
  BHM1307 848cc manual gearbox engine, with 1 1/2" tail diameter type crankshaft for Deva primary gear bush and timing chain tensioner (1980-84)
  8G52 848cc automatic gearbox engine without closed circuit breathing (1964-69)
  8G53 848cc automatic gearbox engine with closed circuit breathing (1964-71; 848cc automatic discontinued after 1971)
  8G18 997cc high compression engine, with 1 3/8" tail diameter type crankshaft accepting oil-fed primary gear bush (1961-62; replaces D.U. bush type)
  8G36 997cc high compression engine, with 1 3/8" tail diameter type crankshaft for Deva primary gear bush (1962-63)
  8G29 997cc high compression engine, with 1 1/2" tail diameter type crankshaft for Deva primary gear bush (1963)
  8G23 997cc low compression engine, with 1 3/8" tail diameter type crankshaft accepting oil-fed primary gear bush (1961-62; replaces D.U. bush type)
  8G37 997cc low compression engine, with 1 3/8" tail diameter type crankshaft for Deva primary gear bush (1962-63)
  8G30 997cc low compression engine, with 1 1/2" tail diameter type crankshaft for Deva primary gear bush (1963)
   
There never was a differentiation made between open circuit or closed circuit breathing, nor between dynamo or alternator fitment, on manual transmission reconditioned engines.  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.  All factory reconditioned 848cc engines were high compression ratio units.

Rebuilt or Repaired 848 and 997cc 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      
1 GUG49 GASKET SET, conversion ('bottom end set') 1 Manual gearbox models.
  GEG254 GASKET SET, conversion ('bottom end set') 1 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    
2 2K8169 PLUG, core (welch), cylinder block 4  
3 2K1345 PLUG, oil pressure release valve passage 2  
4 12H1734 PLUG, oil gallery 2  
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 1959-69.
  CHS2515 STUD, fuel pump drive aperture 2 1969 on.
From 1959-69 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.
         
11 2A265 PLATE, blanking fuel pump drive aperture 1 1959-69.
12 GUG705557GM GASKET, blanking plate 1 1959-69.
13 FNZ105 NUT, blanking plate to block 2 1959-69.
14 LWZ205 WASHER, locking 2 1959-69.
15 PWZ105 WASHER, plain 1 Required for open circuit breathing vent pipe bracket (if fitted).
16 53K615 STUD, oil filter head 2 Manual gearbox, 1959-73.  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, 1965-71.
18 88G402 GASKET, blanking plate 1 Automatic gearbox, 1965-71.
19 SH506071 SCREW, blanking plate to block 2 Automatic gearbox, 1965-71.
20 12G1058 WASHER, sealing 2 Automatic gearbox, 1965-71.
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 2A52 LINER, camshaft bearing 1 848cc.
25 BHM1211 LINER SET, camshaft bearings 1 997cc.
26 3H576 TAP, cooling system drain 1 Alternative to plug.
27 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.
         
28 53K2853 PLUG, cooling system drain 1 Alternative to tap.
29 6K638B WASHER, sealing plug 1  
30 2A612 HOUSING, distributor 1 1963-65; does not require O ring.
31 12A1136 HOUSING, distributor 1 1965 on; requires O ring.
32 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.
         
33 SH604061 SCREW, housing to block 2  
34 LWZ404 WASHER, shakeproof 2  
         
Engine Front Mounting Plate    
35 2A970 PLATE, engine front mounting 1 1959-79.
36 12G2626 PLATE, engine front mounting 1 1979 on.  Accepts chain tensioner.
37 12G619B GASKET, plate to block 1  
  GUG705554GM GASKET, plate to block 1 1979 on.  Accepts chain tensioner.
38 SH605051 SCREW, plate to block 2  
39 LWZ305 WASHER, locking 2  
40 53K2016 SCREW, plate to main bearing cap 2  
41 6K831 LOCK TAB, screw 1 1959-69.
42 WF600041 WASHER, shakeproof 2 1969 on.  Will replace lock tab on earlier engines.
43 AHU2379 PLATE, camshaft locating 1  
44 SH604061 SCREW, plate to block 3  
45 WF600040 WASHER, shakeproof 3  
         
Timing Cover 1959-79 (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.  
 
46 12G2506 COVER, front, timing 1 Includes oil seal.
47 88G561 OIL SEAL, timing cover 1 Included in timing cover.
48 12A666 STIFFENER, timing cover 1 Use on early 1960s covers suffering from poor sealing.
49 12A956 GASKET, timing cover 1  
50 SH604031 SCREW, timing cover to front mounting plate 6  
51 LWZ204 WASHER, locking 6  
52 PWZ104 WASHER, plain 6/3 Qty. reduced when stiffener is present.
53 SH605061 SCREW, timing cover to mounting plate and block 4  
54 LWZ305 WASHER, locking 4  
55 PWZ105 WASHER, plain 4/3 Qty. reduced when stiffener is present.
         
Timing Cover 1979 On (with chain tensioner pad)    
56 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.
57 88G561 OIL SEAL, timing cover 1 Included in timing cover.
58 GUG705550GM GASKET, timing cover 1 1979 on; for CAM4641 and CAM4904 covers.
59 SH604031 SCREW, timing cover to front mounting plate 6  
60 LWZ204 WASHER, locking 6  
61 PWZ104 WASHER, plain 6  
62 SH605061 SCREW, timing cover to mounting plate and block 5  
63 LWZ305 WASHER, locking 5  
64 PWZ105 WASHER, plain 5  
65 FNZ105 NUT, timing cover to mounting plate 1  
         
Tappet Chest Covers
66      - COVER, tappet chest, LH, with breather pipe 1 Convex cover; for open circuit breathing (1959-66).
67      - COVER, tappet chest, LH, with breather pipe 1 Concave cover; for open circuit breathing (1966-69).
68 12G577 COVER, tappet chest, LH, with oil separator 1 Convex cover; for closed circuit breathing (1964-66).
69 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.
         
70 12H941 COVER, tappet chest, RH 1 Convex cover, 1959-66.
71 12A1386 COVER, tappet chest, RH 1 Concave cover, 1966 on.
72 12A1139 GASKET, cover, cork 1 For convex type cover.
73 BH605151 BOLT, cover to block 1 For convex type cover.
74 2K4458 WASHER, bolt 1 For convex type cover.
75 GUG705505GM GASKET, cover, rubber 1 For concave type cover.
76 SH605091 SCREW, cover to block 1 For concave type cover.
77 12A1177 WASHER, cup 1 For concave type cover.
78 12A1176 BUSH, rubber 1 For concave type cover.
79 MRC1980A BUSH, rubber 1 Later design; replaces 12A1176 and 12A1177.
         
Oil System Components
80 2K4994 PLUG, priming 1  
81 6K464 WASHER, sealing 1  
82 12H865 PLUNGER, oil pressure relief valve 1 Standard fitment.
83 BLS916 BALL, oil pressure relief valve 1 Alternative; see note below.

The transverse A series engine is quite susceptible to a sticking oil pressure relief valve because its lubricating oil is shared with the gearbox and dirty oil ends up carrying fine metallic particles from the gearbox into the engine (never skimp on Mini oil changes!). Almost invariably, if the valve is going to stick it will do so in the wide-open position when the oil is cold and thick. As the oil warms up it gets thinner; because the valve is still stuck wide open the oil pressure drops alarmingly- the oil pump can't keep up with the thin oil and a wide open valve- and the engine ceases to be lubricated correctly.

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.

         
84 6K853 SPRING, oil pressure relief valve 1 848cc.
  AEA536 SPRING, oil pressure relief valve 1 997cc.
85 12A1851 CAP, threaded, relief valve 1  
86 6K431 WASHER, sealing 1  
87 2A797 HOUSING, oil pressure relief valve 1 Press-fit in cylinder block.
88 12A116 DIPSTICK, oil level 1 Manual gearbox; 848 and 997cc.
89 AEC671 WASHER, sealing dipstick 1 Manual gearbox; 848 and 997cc.
90 12G107 TUBE, dipstick, plastic 1 Manual gearbox; 997cc.
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.
View as:
Show items
Items 1 to 12 of 84 total
1 2 3 4 5 6 ...
Part No: 12G619B
  In Stock
1 points earn (£0.01)
£1.86 inc VAT
£1.55 ex VAT
Part No: GUG705550GM
  In Stock
1 points earn (£0.01)
£2.16 inc VAT
£1.80 ex VAT
Part No: 2K4958
  In Stock
£0.35 inc VAT
£0.29 ex VAT
Part No: WF600041
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: WF600040
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: SH605091
  In Stock
£0.72 inc VAT
£0.60 ex VAT
Part No: SH506071
  In Stock
£0.65 inc VAT
£0.54 ex VAT
Part No: MRC1980A
  In Stock
1 points earn (£0.01)
£1.97 inc VAT
£1.64 ex VAT
Part No: GUG705557GM
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: GUG705554GM
  In Stock
1 points earn (£0.01)
£1.86 inc VAT
£1.55 ex VAT
Part No: GUG705505GM
  In Stock
1 points earn (£0.01)
£1.32 inc VAT
£1.10 ex VAT
Part No: GUG49
  In Stock
11 points earn (£0.11)
£13.80 inc VAT
£11.50 ex VAT
Add to cart
Items 1 to 12 of 84 total
1 2 3 4 5 6 ...
Request a free catalogue