Somerford Mini Ltd. Ordering Parts Using This Catalogue

Internal Engine - 998 and 1098cc
No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks
Connecting Rods and Crankshaft (continued)
Connecting Rods 1988 On
(Press Fit Gudgeon Pin)
25 12A1997 ROD ASS’Y, connecting, nos 2 and 4 2
26 12A1999 ROD ASS’Y, connecting, nos 1 and 3 2
27 12G125 BUSH, small end 4 Included in rod assembly.
28 CAM6126 BOLT, connecting rod cap, big end 8
29 8G2198STD BEARING SET, connecting rod, big end 1 Set of 4 pairs, standard size.
8G2198010 BEARING SET, connecting rod, big end 1 Set of 4 pairs, 0.010" undersize .
8G2198020 BEARING SET, connecting rod, big end 1 Set of 4 pairs, 0.020" undersize .
8G2198030 BEARING SET, connecting rod, big end 1 Set of 4 pairs, 0.030" undersize .
8G2198040 BEARING SET, connecting rod, big end 1 Set of 4 pairs, 0.040" undersize .
Crankshaft
Crankshafts shown here are either assemblies (including main bearings, connecting rod bearings and thr ust
washers), or bare (without bearings or thrust washers). However, please note that new crankshafts may
be supplied complete with bearings but other times not, depending on what is a vailable at the time.
Additionally Somerford Mini can offer a crankshaft regrinding service, usually carried out on your old unit.
You should enquire on the current status of supply before ordering a crankshaft from Somerford Mini.
For details of the primar y gear and its bushes located on the tail of the crankshaft, please see the
‘Manual Gearbox - Primary, Idler and Drive Gears’ section or the ‘Automatic Transmission - Torque
Converter and Housing’ section in the Transmissions area of the Somerford Mini catalogue .
30 8G2733 CRANKSHAFT ASS’Y (with 1963-83 main 1 998cc 1963-83. Stamped no. 12A595
bearings) or 12A1451.
BHM1436 CRANKSHAFT ASS’Y (with 1983 on main 1 998cc 1983 on. Stamped no.
bearings) 12A1451.
8G2732 CRANKSHAFT ASS’Y (with 1963-83 main 1 1098cc . Stamped no. 12G82.
bearings)
31 12A1451 CRANKSHAFT, bare 1 998cc . Stamped 12A1451.
12G82 CRANKSHAFT, bare 1 1098cc . Stamped no. 12G82.
There are two distinct main bearing designs: 8G2332 bearings have locating lugs on the edge of both
upper and lower halves, whereas BHM1573 bearings have lugs on the edge of the upper halves and in
the centre of the lower halves. They cannot be interchanged in engines because the engine main bearing
caps are unique for each design.
32 8G2332STD BEARING SET, main bearings, 3 pairs 1 998/1098cc 1963-83; std. size.
8G2332010 BEARING SET, main bearings, 3 pairs 1 998/1098cc 1963-83; 0.010" u/size .
8G2332020 BEARING SET, main bearings, 3 pairs 1 998/1098cc 1963-83; 0.020" u/size .
8G2332030 BEARING SET, main bearings, 3 pairs 1 998/1098cc 1963-83; 0.030" u/size .
8G2332040 BEARING SET, main bearings, 3 pairs 1 998/1098cc 1963-83; 0.040" u/size .
BHM1573STD BEARING SET, main bearings, 3 pairs 1 998cc 1983 on; std. size.
BHM1573010 BEARING SET, main bearings, 3 pairs 1 998cc 1983 on; 0.010" undersize.
BHM1573020 BEARING SET, main bearings, 3 pairs 1 998cc 1983 on; 0.020" undersize.
BHM1573030 BEARING SET, main bearings, 3 pairs 1 998cc 1983 on; 0.030" undersize.
BHM1573040 BEARING SET, main bearings, 3 pairs 1 998cc 1983 on; 0.040" undersize.
Thrust washers are supplied as a pair; i.e. one upper and one lower thrust washer. Two pairs are
required per engine, fitted selectively to obtain the correct amount of end float on the crankshaft.
33 BHM1292STD THRUST WASHERS, crankshaft, pair A/R Standard size .
BHM1292003 THRUST WASHERS, crankshaft, pair A/R +0.003" oversize .
BHM1292030 THRUST WASHERS, crankshaft, pair A/R +0.030" oversize .
34 6K836 KEY, Woodr uff, crankshaft 1
35 8G725 GEAR, timing chain, crankshaft 1 998cc (not Cooper) and 1098cc .
AEA538 GEAR, timing chain, crankshaft 1 998cc (Cooper).
36 6K628 WASHER, packing A/R
37 12A1148 OIL THROWER, crankshaft 1
38 88G561 OIL SEAL, timing cover 1 Included in timing co ver assembly.
Crankshaft Pulley
The 998cc (not Cooper) engine was not fitted with a vibration damper type pulley, whereas the 1098cc
engine used a one-piece damper pulley. The 998cc Cooper unit also received one, or in fact two
different ones. The original design was a separate pulley with a with a damper screwed to it; eventually
a one-piece damper pulley was offered as a replacement but in fact both set ups remained available as
spares for many years . If you want the original pulle y, it is still available today from Somerford Mini.
Note that the bolt retaining the pulley to the crankshaft is specific to the type of pulley being fitted.
Later 998cc and 1098cc engines from 1980 approximately onwards received pulleys with strobe timing
plates attached as part of the A Plus modification programme .
998cc (not Cooper) Crankshaft Pulley
39 2A940 PULLEY, crankshaft 1 1963-70, dynamo fitted models.
12A1380 PULLEY, crankshaft 1 1963-70, alternator fitted models.
CAM6323 PULLEY, crankshaft 1 1970-80; will fit earlier engines.
CAM6497 PULLEY, crankshaft 1 1980 on; A Plus (with timing plate).
40 AEA312 BOLT, pulley to crankshaft 1 1963-87.
TAM2019 BOLT, pulley to crankshaft 1 1987 on.
41 12A398 LOCK TAB, pulley bolt 1 1963-87.
TAM2020 LOCK TAB, pulley bolt 1 1987 on.
998cc (Cooper) Crankshaft Pulley
42 AEG454 PULLEY, crankshaft 1 Separate pulley and damper fitment.
43 12A367 DAMPER 1 Separate pulley and damper fitment.
44 SH605051 SCREW, damper to pulley 4 Separate pulley and damper fitment.
45 LWZ305 WASHER, locking 4 Separate pulley and damper fitment.
46 AEA312 BOLT, pulley to crankshaft 1 Separate pulley and damper fitment.
47 12A398 LOCK TAB, pulley bolt 1 Separate pulley and damper fitment.
48 88G305 PULLEY, crankshaft, with damper 1 One-piece damper pulley fitment.
49 12A283 BOLT, pulley to crankshaft 1 One-piece damper pulley fitment.
50 12A398 LOCK TAB, pulley bolt 1 One-piece damper pulley fitment.
1098cc Crankshaft Pulley
51 88G305 PULLEY, crankshaft, with damper 1 1975-76.
CAM4929 PULLEY, crankshaft, with damper 1 1976-80; will fit earlier engines.
AHU1878 PULLEY, crankshaft, with damper 1 1980 on; A Plus (with timing plate).
52 12A283 BOLT, pulley to crankshaft 1
53 12A398 LOCK TAB, pulley bolt 1
Camshaft and Tappets
A range of uprated camshafts and other engine tuning components are also available from Somerford Mini,
but are not listed here. Please contact us for details.
998cc (not Cooper) Camshaft
54 8G712 CAMSHAFT, for ‘pin drive’oil pump 1 1963-80, manual gearbox.
12A1065 CAMSHAFT, for ‘star drive’ oil pump 1 1967-80, automatic gearbox.
CAM6267 CAMSHAFT, for ‘slot drive’oil pump 1 1980 on, A Plus; for 8.3:1 comp. ratio.
CAM4717 CAMSHAFT, for ‘slot drive’oil pump 1 1980 on, A Plus; for 10.3:1 comp. ratio.
998cc (Cooper) Camshaft
AEA630 CAMSHAFT, for ‘pin drive’oil pump 1 Alternative to 12G165.
12G165 CAMSHAFT, for ‘pin drive’oil pump 1 Alternative to AEA630.
1098cc Camshaft
AEA630 CAMSHAFT, for ‘pin drive’oil pump 1 1975-80, alternative to 12G165.
12G165 CAMSHAFT, for ‘pin drive’oil pump 1 1975-80, alternative to AEA630.
12G2983 CAMSHAFT, for ‘slot drive’oil pump 1 1980 on, A Plus type.
55 2A299 PIN, oil pump drive 1 Included in ‘pin drive’type camshafts.
56 CHM108 FLANGE, for ‘star drive’ oil pump 1 Use with ‘star drive’ type camshaft.
(flange also known as ‘spider’)
57 12G4499 SPINDLE, distributor drive , centred slot 1 1963-80.
12G3560 SPINDLE, distributor drive , offset slot 1 1980 on, A Plus type.
58 2A13 TAPPET (also known as cam follower) 8 Standard size .
2A13010 TAPPET (also known as cam follower) 8 +0.010" oversize.
59 2A14 PUSH ROD 8 Alternative to 12A250 (replace in sets).
12A250 PUSH ROD 8 Alternative to 2A14 (replace in sets).
Timing Chain
60 3H2127 CHAIN, timing 1
61 2A85 GEAR, timing chain, camshaft, 1 1963-74, may be replaced by
with ring tensioners
12G4337 without ring tensioners.
62 2A86 GEAR, timing chain, camshaft, 1 1963-74, may be replaced by
ring tensioner type
12G4337 without ring tensioners.
63 12G4337 GEAR, timing chain, camshaft 1 1974-79, use without ring tensioners.
1979 on, use with tensioner pad.
64 8G549 RING, timing chain tensioner, rubber 2 1963-74.
65 12G2621 PAD,timing chain tensioner 1 1979 on.
66 12G2629 PIN, tensioner pivot 1 1979 on.
67 12G2628 PLATE, tensioner mounting 1 1979 on.
68 SH605061 SCREW, plate to cylinder block 2 1979 on.
69 LWZ305 WASHER, locking 2 1979 on.
70 PWZ105 WASHER, plain 2 1979 on.
71 WKN505 KEY, Woodr uff 1
72 6K629 NUT, gear to camshaft 1
73 2A759 LOCK TAB, nut 1
Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk 25