Somerford Mini Ltd. Ordering Parts Using This Catalogue

External Engine - 848 and 997cc
No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks
External Engine Components (continued)
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.
The first automatic gearbox Minis of 1964-65 had an adaptor and pipe running from what would have
been the oil filter head mounting face on a manual engine down to the gearbox. From mid-1965 this
was dispensed with in favour of an oil pipe more similar in design to that used on a manual power unit,
leaving all subsequent automatic-type engines wearing a blanking plate where the adaptor had been
fitted. Full details of the adaptor and oil pipes may be found in the Oil Filters and Oil Pipes section of
the Somerford Mini Catalogue.
17 22A1203 PLATE, blanking cylinder block oil filter 1 Automatic gearbox, 1965-71.
face
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 GUG705554GM GASKET, plate to block 1
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 and most with
stiffeners, one without. All were superseded by 1970 by 12G2506, which includes a timing pointer and
integral lo wer stiffener and does not therefore require the stiffener 12A666 listed below. The plain
washers PWZ104 and PWZ105 listed here 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 ear ly 1960s covers suffering
from poor sealing.
49 12A956 GASKET, timing cover 1
50 SH604031 SCREW, timing cover to front mounting 6
plate
51 LWZ204 WASHER, locking 6
52 PWZ104 WASHER, plain 6/3 Qty. reduced if stiffener is present.
53 SH605061 SCREW, timing cover to mounting plate 4
and block
54 LWZ305 WASHER, locking 4
55 PWZ105 WASHER, plain 4/3 Qty. reduced if stiffener is present.
Timing Cover 1979 On (with chain tensioner pad)
56 CAM4641 COVER, front, timing, accepts chain 1 1979-80; includes oil seal.
tensioner pad
CAM4904 COVER, front, timing, accepts chain 1 1980 on; includes oil seal.
tensioner pad
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 6
plate
60 LWZ204 WASHER, locking 6
61 PWZ104 WASHER, plain 6
62 SH605061 SCREW, timing cover to mounting plate 5
and block
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 1 Convex cover; for open circuit
pipe breathing (1959-66).
67 - COVER, tappet chest,LH, with breather 1 Concave cover ; for open circuit
pipe breathing (1966-69).
68 12G577 COVER, tappet chest,LH, with oil 1 Convex cover; for closed circuit
separator breathing (1964-66).
69 12A1212 COVER, tappet chest,LH, with oil 1 Concave cover; for closed circuit
separator
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, r ubber 1 For concave type cover.
79 MRC1980A BUSH, r ubber 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 it gets
thinner; because the valve is still stuck wide open the oil pressure drops alarmingly - the oil pump can’t
keep up with thin oil and a wide open valve - and the engine ceases to be lubricated correctly.
The BLS916 ball listed above may be used in place of the standard fitment plunger to guard against a
sticking relief valve. It must, however, be used in conjunction with the shorter and stronger AEA536 relief
valve 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.
Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk
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