Internal engine - 970, 1071 and 1275cc (cooper s)

Part No: SH605051
  In Stock
SET SCREW- 5/16 UNF x 5/8''
Required Quantity: 4
£0.36 inc VAT
£0.30 ex VAT
Part No: LWZ305
  No Longer Available
USE: LWZ205
Required Quantity: 4
£0.00 inc VAT
£0.00 ex VAT
Part No: 20747020
  Available to Customer Order
219 points earn (£2.19)
£263.45 inc VAT
£219.54 ex VAT
Part No: 20747040
  Available to Customer Order
219 points earn (£2.19)
£263.45 inc VAT
£219.54 ex VAT
Part No: 20747060
  Available to Customer Order
219 points earn (£2.19)
£263.45 inc VAT
£219.54 ex VAT
Part No: 21253020
  Awaiting Stock - On Order
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Part No: 21253040
  Awaiting Stock - On Order
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Part No: 21253060
  In Stock
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Part No: 12A1148
  In Stock
2 points earn (£0.02)
£3.36 inc VAT
£2.80 ex VAT
Part No: 12A250
  No Longer Available
USE: 2A14
Required Quantity: 8
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A283
  No Longer Available
USE: AEA312
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 12A367
  In Stock
58 points earn (£0.58)
£70.42 inc VAT
£58.68 ex VAT
Part No: 12A398
  In Stock
 
£0.86 inc VAT
£0.72 ex VAT
Part No: 12G1397
  In Stock
11 points earn (£0.11)
£14.36 inc VAT
£11.97 ex VAT
Part No: 12G1699
  In Stock
8 points earn (£0.08)
£10.50 inc VAT
£8.75 ex VAT
Part No: 12G4499
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 1G1167
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 20747STD
  Available to Customer Order
192 points earn (£1.92)
£230.57 inc VAT
£192.14 ex VAT
Part No: 21253STD
  In Stock
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Part No: 28G234
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 2A13
  In Stock
CAM FOLLOWER (NO OIL HOLE)
Required Quantity: 8
1 points earn (£0.01)
£1.80 inc VAT
£1.50 ex VAT
Part No: 2A13010
  No Longer Available
CAM FOLLOWER +010'' OVERSIZE
Required Quantity: 8
£0.00 inc VAT
£0.00 ex VAT
Part No: 2A14
  In Stock
5 points earn (£0.05)
£6.90 inc VAT
£5.75 ex VAT
Part No: 2A299
  No Longer Available
PIN-OIL PUMP DRIVE
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 2A759
  In Stock
LOCKTAB-CAMSHAFT SPROCKET
Required Quantity: 1
 
£0.90 inc VAT
£0.75 ex VAT
Part No: 2H4905
  In Stock
TIMING CHAIN- DUPLEX
Required Quantity: 1
4 points earn (£0.04)
£5.86 inc VAT
£4.88 ex VAT
Part No: 38G343
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 38G357
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 38G402
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 6K628
  In Stock
£1.08 inc VAT
£0.90 ex VAT
Part No: 6K629
  In Stock
NUT-TIMING GEAR TO CAMSHAFT
Required Quantity: 1
3 points earn (£0.03)
£4.42 inc VAT
£3.68 ex VAT
Part No: 6K836
  In Stock
KEY-WOODRUFF -CRANKSHAFT
Required Quantity: 1
5 points earn (£0.05)
£7.15 inc VAT
£5.96 ex VAT
Part No: 88G305
  No Longer Available
USE: AHU1878
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 88G561
  In Stock
1 points earn (£0.01)
£1.88 inc VAT
£1.57 ex VAT
Part No: 8G2391010
  In Stock
16 points earn (£0.16)
£20.15 inc VAT
£16.79 ex VAT
Part No: 8G2391020
  In Stock
16 points earn (£0.16)
£20.15 inc VAT
£16.79 ex VAT
Part No: 8G2391030
  In Stock
19 points earn (£0.19)
£23.75 inc VAT
£19.79 ex VAT
Part No: 8G2391040
  In Stock
16 points earn (£0.16)
£20.15 inc VAT
£16.79 ex VAT
Part No: 8G2391STD
  In Stock
16 points earn (£0.16)
£20.15 inc VAT
£16.79 ex VAT
Part No: 8G2399010
  In Stock
 
24 points earn (£0.24)
£28.80 inc VAT
£24.00 ex VAT
Part No: 8G2399020
  In Stock
24 points earn (£0.24)
£28.80 inc VAT
£24.00 ex VAT
Part No: 8G2399030
  In Stock
24 points earn (£0.24)
£28.80 inc VAT
£24.00 ex VAT
Part No: 8G2399040
  In Stock
24 points earn (£0.24)
£28.80 inc VAT
£24.00 ex VAT
Part No: 8G2399STD
  In Stock
24 points earn (£0.24)
£28.80 inc VAT
£24.00 ex VAT
Part No: 8G2432010
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2432020
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2432040
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2432060
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2432STD
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2434010
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2434020
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2434040
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2434060
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2434STD
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2435010
  No Longer Available
USE: BHM1628010
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2435020
  No Longer Available
USE: BHM1628020
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2435040
  No Longer Available
USE: BHM1628040
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2435060
  No Longer Available
USE: BHM1628060
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2435STD
  No Longer Available
USE: BHM1628STD
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: 8G2739
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEA312
  In Stock
9 points earn (£0.09)
£10.80 inc VAT
£9.00 ex VAT
Part No: AEA695
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEA696
  In Stock
39 points earn (£0.39)
£46.80 inc VAT
£39.00 ex VAT
Part No: AEG147
  In Stock
NUT-BIG END CAP- COOPER 'S'
Required Quantity: 8
2 points earn (£0.02)
£2.40 inc VAT
£2.00 ex VAT
Part No: AEG148
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG170
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG184010
  No Longer Available
USE: 21253010
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG184020
  No Longer Available
USE: 21253020
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG184040
  No Longer Available
USE: 21253040
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG184060
  No Longer Available
USE: 21253060
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG184STD
  No Longer Available
USE: 21253STD
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG189
  No Longer Available
PIN-GUDGEON 'S' PISTONS
Required Quantity: 4
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG309
  No Longer Available
ROD-CONNECTING-970cc 'S'
Required Quantity: 4
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG314
  In Stock
PUSH ROD-1275cc
Required Quantity: 8
2 points earn (£0.02)
£3.06 inc VAT
£2.55 ex VAT
Part No: AEG315
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG329
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG420
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG428
  In Stock
19 points earn (£0.19)
£22.80 inc VAT
£19.00 ex VAT
Part No: AEG454
  In Stock
51 points earn (£0.51)
£61.32 inc VAT
£51.10 ex VAT
Part No: AEG479
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG510
  No Longer Available
CAMSHAFT-1275 'S' '66-'69
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG519
  No Longer Available
USE: BEB6001/8
Required Quantity: 8
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG520
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG542
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG584
  In Stock
2 points earn (£0.02)
£3.12 inc VAT
£2.60 ex VAT
Part No: AEG584010
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG584020
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG622
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: AEG624
  Available to Customer Order
£0.00 inc VAT
£0.00 ex VAT
Part No: BHM1165010
  Available to Customer Order
62 points earn (£0.62)
£74.75 inc VAT
£62.29 ex VAT
Part No: BHM1165020
  In Stock
106 points earn (£1.06)
£127.86 inc VAT
£106.55 ex VAT
Part No: BHM1165040
  Available to Customer Order
65 points earn (£0.65)
£78.12 inc VAT
£65.10 ex VAT
Part No: BHM1165060
  Available to Customer Order
99 points earn (£0.99)
£119.32 inc VAT
£99.43 ex VAT
Part No: BHM1165STD
  In Stock
77 points earn (£0.77)
£93.07 inc VAT
£77.56 ex VAT
Part No: BHM1293003
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: BHM1293030
  In Stock
 
8 points earn (£0.08)
£10.62 inc VAT
£8.85 ex VAT
Part No: BHM1293STD
  In Stock
8 points earn (£0.08)
£10.20 inc VAT
£8.50 ex VAT
Part No: CAM4929
  No Longer Available
USE: AHU1878
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: CHM108
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: R39380020
  Available to Customer Order
62 points earn (£0.62)
£74.75 inc VAT
£62.29 ex VAT
Part No: R39380040
  Available to Customer Order
62 points earn (£0.62)
£74.75 inc VAT
£62.29 ex VAT
Part No: R39380060
  Available to Customer Order
57 points earn (£0.57)
£68.86 inc VAT
£57.38 ex VAT
Part No: R39380STD
  Available to Customer Order
62 points earn (£0.62)
£74.75 inc VAT
£62.29 ex VAT
Part No: R41570020
  No Longer Available
USE: BHM1628020
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: R41570040
  No Longer Available
USE: BHM1628040
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: R41570060
  No Longer Available
USE: BHM1628060
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: R41570STD
  No Longer Available
USE: BHM1628STD
Required Quantity: 1
£0.00 inc VAT
£0.00 ex VAT
Part No: WKN505
  In Stock
1 points earn (£0.01)
£1.54 inc VAT
£1.28 ex VAT
Part No: BHM1293005
  In Stock
8 points earn (£0.08)
£10.62 inc VAT
£8.85 ex VAT
Part No: 8G2391STDHD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391010HD
  In Stock
 
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391020HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391030HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391040HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 2H4905HD
  In Stock
 
18 points earn (£0.18)
£22.50 inc VAT
£18.75 ex VAT
Part No: 21253030
  Awaiting Stock - On Order
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Pistons, Piston Rings and Cylinder Liners     
Note before ordering a piston set or ring set from Somerford Mini: a set of pistons consists of four pistons complete with rings and gudgeon pins; a set of rings 
consists of sufficient rings for four pistons.  Cylinder liners are supplied individually.  Various piston upgrades (superior design and manufacture, different  
capacities and compression ratios) are also available from Somerford Mini, but are only listed in this catalogue in instances where they make a good, 
complication-free replacement for original specification pistons which are in short supply.    
         
1071cc (9:1 compression ratio, dished crown)    
Original Equipment 3 and 4 Ring Pistons    
Within a very short period after the end of 1071cc engine production, the factory discontinued the original 3 ring pistons in favour of a 4 ring type - actually the
same pistons they were currently fitting in the 1275cc Cooper S engine.  Today, supply of these 4 ring pistons is sketchy to say the least, and many owners
or engine builders use Powermax pistons or replacements with metric rings (listed later on this page).  Both of the latter revert to having 3 rings per piston, but 
these rings are not the same as the original 1071cc 3 rings and are not interchangeable with them.    
Ill. No. Part No. Description Qty. Rqd. Remarks
1 AEG184STD PISTON SET, original 3 ring type 1 Set of 4, standard size.
  AEG184010 PISTON SET, original 3 ring type 1 Set of 4, +0.010" oversize.
  AEG184020 PISTON SET, original 3 ring type 1 Set of 4, +0.020" oversize.
  AEG184040 PISTON SET, original 3 ring type 1 Set of 4, +0.040" oversize.
  AEG184060 PISTON SET, original 3 ring type 1 Set of 4, +0.060" oversize.
  8G2434STD PISTON SET, replacement 4 ring type 1 Set of 4, standard size.
  8G2434010 PISTON SET, replacement 4 ring type 1 Set of 4, +0.010" oversize.
  8G2434020 PISTON SET, replacement 4 ring type 1 Set of 4, +0.020" oversize.
  8G2434040 PISTON SET, replacement 4 ring type 1 Set of 4, +0.040" oversize.
  8G2434060 PISTON SET, replacement 4 ring type 1 Set of 4, +0.060" oversize.
2 8G2435STD RING SET, for original 3 ring pistons 1 4 piston set, standard size.
  8G2435010 RING SET, for original 3 ring pistons 1 4 piston set, +0.010" oversize.
  8G2435020 RING SET, for original 3 ring pistons 1 4 piston set, +0.020" oversize.
  8G2435040 RING SET, for original 3 ring pistons 1 4 piston set, +0.040" oversize.
  8G2435060 RING SET, for original 3 ring pistons 1 4 piston set, +0.060" oversize.
  BHM1165STD RING SET, for replacement 4 ring pistons 1 4 piston set, standard size.
  BHM1165010 RING SET, for replacement 4 ring pistons 1 4 piston set, +0.010" oversize.
  BHM1165020 RING SET, for replacement 4 ring pistons 1 4 piston set, +0.020" oversize.
  BHM1165040 RING SET, for replacement 4 ring pistons 1 4 piston set, +0.040" oversize.
  BHM1165060 RING SET, for replacement 4 ring pistons 1 4 piston set, +0.060" oversize.
         
1275cc (9.75:1 compression ratio, dished crown)    
Original Equipment 4 Ring Pistons    
Ill. No. Part No. Description Qty. Rqd. Remarks
3 8G2434STD PISTON SET, original 4 ring type 1 Set of 4, standard size.
  8G2434010 PISTON SET, original 4 ring type 1 Set of 4, +0.010" oversize.
  8G2434020 PISTON SET, original 4 ring type 1 Set of 4, +0.020" oversize.
  8G2434040 PISTON SET, original 4 ring type 1 Set of 4, +0.040" oversize.
  8G2434060 PISTON SET, original 4 ring type 1 Set of 4, +0.060" oversize.
4 BHM1165STD RING SET, for original 4 ring pistons 1 4 piston set, standard size.
  BHM1165010 RING SET, for original 4 ring pistons 1 4 piston set, +0.010" oversize.
  BHM1165020 RING SET, for original 4 ring pistons 1 4 piston set, +0.020" oversize.
  BHM1165040 RING SET, for original 4 ring pistons 1 4 piston set, +0.040" oversize.
  BHM1165060 RING SET, for original 4 ring pistons 1 4 piston set, +0.060" oversize.
         
1071cc/1275cc (9:1/9.75:1 compression ratio, dished crown)     
Replacement 3 Ring and Powermax Pistons    
Ill. No. Part No. Description Qty. Rqd. Remarks
5 21253STD PISTON SET, replacement metric 3 ring type 1 Set of 4, standard size.
  21253020 PISTON SET, replacement metric 3 ring type 1 Set of 4, +0.020" oversize.
  21253040 PISTON SET, replacement metric 3 ring type 1 Set of 4, +0.040" oversize.
  21253060 PISTON SET, replacement metric 3 ring type 1 Set of 4, +0.060" oversize.
  20747STD PISTON SET, Powermax 3 ring type 1 Set of 4, standard size.
  20747020 PISTON SET, Powermax 3 ring type 1 Set of 4, +0.020" oversize.
  20747040 PISTON SET, Powermax 3 ring type 1 Set of 4, +0.040" oversize.
  20747060 PISTON SET, Powermax 3 ring type 1 Set of 4, +0.060" oversize.
6 R41570STD RING SET, for replacement metric 3 ring pistons 1 4 piston set, standard size.
  R41570020 RING SET, for replacement metric 3 ring pistons 1 4 piston set, +0.020" oversize.
  R41570040 RING SET, for replacement metric 3 ring pistons 1 4 piston set, +0.040" oversize.
  R41570060 RING SET, for replacement metric 3 ring pistons 1 4 piston set, +0.060" oversize.
  R39380STD RING SET, for Powermax 3 ring pistons 1 4 piston set, standard size.
  R39380020 RING SET, for Powermax 3 ring pistons 1 4 piston set, +0.020" oversize.
  R39380040 RING SET, for Powermax 3 ring pistons 1 4 piston set, +0.040" oversize.
  R39380060 RING SET, for Powermax 3 ring pistons 1 4 piston set, +0.060" oversize.
         
970cc (10:1 compression ratio, flat crown)    
Original Equipment 4 Ring Pistons    
While the 1071cc and 1275cc Cooper S engines share the same dished crown pistons, the 970cc engine has a unique flat crown design:
Ill. No. Part No. Description Qty. Rqd. Remarks
7 8G2432STD PISTON SET, original 4 ring type 1 Set of 4, standard size.
  8G2432010 PISTON SET, original 4 ring type 1 Set of 4, +0.010" oversize.
  8G2432020 PISTON SET, original 4 ring type 1 Set of 4, +0.020" oversize.
  8G2432040 PISTON SET, original 4 ring type 1 Set of 4, +0.040" oversize.
  8G2432060 PISTON SET, original 4 ring type 1 Set of 4, +0.060" oversize.
8 BHM1165STD RING SET, for original 4 ring pistons 1 4 piston set, standard size.
  BHM1165010 RING SET, for original 4 ring pistons 1 4 piston set, +0.010" oversize.
  BHM1165020 RING SET, for original 4 ring pistons 1 4 piston set, +0.020" oversize.
  BHM1165040 RING SET, for original 4 ring pistons 1 4 piston set, +0.040" oversize.
  BHM1165060 RING SET, for original 4 ring pistons 1 4 piston set, +0.060" oversize.
9 AEG189 PIN, gudgeon 4 Included in piston sets.
10 AEG428 LINER, cylinder 4 Standard size.
         
Connecting Rods and Crankshaft    
Connecting Rods        
Telling a 970cc connecting rod apart from the 1071/1275cc item is a matter of measuring the distance between small and big end centres: at 5 7/8" the 970cc
rod is 1/8" longer than that used in the larger capacity engines.  The two different material rods for the 1071 and 1275cc engines are identical in design but can 
be distinguished by the forging numbers displayed.  AEG624 is a good substitute for the original AEG520 rod (it was developed for the 1275cc MG Midget/Austin 
Healey Sprite engine), but as always make sure all four you intend to use are the same!    
Ill. No. Part No. Description Qty. Rqd. Remarks
11 AEG520 ROD ASS'Y, connecting (marked AEG177 or AEG521) 4 1071 and 1275cc; original EN24V material.
  AEG624 ROD ASS'Y, connecting (marked AEG625) 4 1071 and 1275cc; replacement in EN21 material.
  AEG309 ROD ASS'Y, connecting  4 970cc.
12 AEG519 BOLT, connecting rod cap ('big end') 8 Included in connecting rod assembly.
13 AEG147 NUT, connecting rod cap ('big end') 8 Included in connecting rod assembly.
14 8G2399STD BEARING SET, connecting rod ('big end bearings') 1 Set of 4 pairs, standard size. 
  8G2399010 BEARING SET, connecting rod ('big end bearings') 1 Set of 4 pairs, 0.010" undersize.
  8G2399020 BEARING SET, connecting rod ('big end bearings') 1 Set of 4 pairs, 0.020" undersize.
  8G2399030 BEARING SET, connecting rod ('big end bearings') 1 Set of 4 pairs, 0.030" undersize.
  8G2399040 BEARING SET, connecting rod ('big end bearings') 1 Set of 4 pairs, 0.040" undersize.
         
Crankshaft      
Crankshafts shown here are either assemblies (including main bearings, connecting rod bearings and thrust 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 available 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 primary gear and its bushes located on the tail of the crankshaft, please see the 'Manual Gearbox - Primary, Idler and Drive Gears' section in the Transmissions area of the Somerford Mini catalogue.  
Ill. No. Part No. Description Qty. Rqd. Remarks
15 38G343 CRANKSHAFT ASS'Y, with bearings, 1 1071cc.  Stamped AEG171.
    EN40B, nitrided, not cross-drilled    
  38G357 CRANKSHAFT ASS'Y, with bearings, 1 1275cc, 1964-66.  Stamped AEG315 or AEG316.
    EN40B, nitrided, not cross-drilled    
  38G402 CRANKSHAFT ASS'Y, with bearings, 1 1275cc, 1966-69.  Stamped AEG479 or AEG480.
    EN40B, nitrided, cross-drilled    
  8G2739 CRANKSHAFT ASS'Y, with bearings, 1 1275cc, 1969-71.  Stamped AEG623 or 12G1505.
    EN16T, tuftrided, cross-drilled    
  28G234 CRANKSHAFT ASS'Y, with bearings, 1 970cc.  Stamped AEG330.
    EN40B, nitrided, not cross-drilled    
16 AEG170 CRANKSHAFT, bare, 1 1071cc.  Stamped AEG171.
    EN40B, nitrided, not cross-drilled    
  AEG315 CRANKSHAFT, bare, 1 1275cc, 1964-66.  Stamped AEG315 or AEG316.
    EN40B, nitrided, not cross-drilled    
  AEG479 CRANKSHAFT, bare, 1 1275cc, 1966-69.  Stamped AEG479 or AEG480.
    EN40B, nitrided, cross-drilled    
  AEG622 CRANKSHAFT, bare, 1 1275cc, 1969-71.  Stamped AEG623 or 12G1505.
    EN16T, tuftrided, cross-drilled    
  AEG329 CRANKSHAFT, bare, 1 970cc.  Stamped AEG330.
    EN40B, nitrided, not cross-drilled    
17 1G1167 RESTRICTOR, oil 1 Included in AEG170, AEG315 and AEG329 crankshafts.
  AEG420 RESTRICTOR, oil 1 Included in AEG479 and AEG622 crankshafts.
18 8G2391STD BEARING SET, main bearings, set of 3 pairs 1 Standard size.
  8G2391010 BEARING SET, main bearings, set of 3 pairs 1 0.010" undersize.
  8G2391020 BEARING SET, main bearings, set of 3 pairs 1 0.020" undersize.
  8G2391030 BEARING SET, main bearings, set of 3 pairs 1 0.030" undersize.
  8G2391040 BEARING SET, main bearings, set of 3 pairs 1 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.
Ill. No. Part No. Description Qty. Rqd. Remarks
19 BHM1293STD THRUST WASHERS, crankshaft, pair A/R Standard size.
  BHM1293003 THRUST WASHERS, crankshaft, pair A/R +0.003" oversize.
  BHM1293005 THRUST WASHERS, crankshaft, pair A/R +0.005" oversize.
  BHM1293030 THRUST WASHERS, crankshaft, pair A/R +0.030" oversize.
20 6K836 KEY, Woodruff, crankshaft 1  
21 AEA695 GEAR, steel, timing chain, crankshaft 1 1963-70.
  12G1699 GEAR, iron, timing chain, crankshaft 1 1970-71.
22 6K628 WASHER, packing A/R  
23 12A1148 OIL THROWER, crankshaft 1  
24 88G561 OIL SEAL, timing cover 1 Included in timing cover assembly.
         
Crankshaft Pulley      
The 1071, 1275 and 970cc Cooper S engines used two different vibration damper pulleys during their production lives.  The original design was a separate
pulley with a damper screwed to it; eventually a one-piece damper pulley was offered as a replacement and was also in fact fitted to all 1969-71 engines.  
Both set ups remained available as spares for many years.  If you want the original pulley, it is still available today from Somerford Mini.  
         
Crankshaft Pulley 1963-69    
Ill. No. Part No. Description Qty. Rqd. Remarks
25 AEG454 PULLEY, crankshaft 1 Separate pulley and damper fitment. 
26 12A367 DAMPER 1 Separate pulley and damper fitment. 
27 SH605051 SCREW, damper to pulley 4 Separate pulley and damper fitment. 
28 LWZ305 WASHER, locking 4 Separate pulley and damper fitment. 
29 AEA312 BOLT, pulley to crankshaft 1 Separate pulley and damper fitment. 
30 12A398 LOCK TAB, pulley bolt 1 Separate pulley and damper fitment. 
31 88G305 PULLEY, crankshaft, with damper 1 One-piece damper pulley fitment.
32 12A283 BOLT, pulley to crankshaft 1 One-piece damper pulley fitment.
33 12A398 LOCK TAB, pulley bolt 1 One-piece damper pulley fitment.
         
Crankshaft Pulley 1969-71    
Ill. No. Part No. Description Qty. Rqd. Remarks
34 88G305 PULLEY, crankshaft, with damper 1  
  CAM4929 PULLEY, crankshaft, with damper 1 May be used to replace 88G305.
35 12A283 BOLT, pulley to crankshaft 1  
36 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.
         
Camshaft       
The standard fitment Cooper S camshafts can be easily distinguished from each other.  AEG542 alone is designed for a 'star' drive oil pump and accepts the  
necessary drive flange in its end.  The other two ('pin drive') cams can be told apart by AEG510 having a single machined identification ring standing proud from 
the shaft, one lobe up from the distributor gear; AEG148 does not have this ring.  AEG542 also has a single, but broader, identification ring.  All Cooper S 
camshafts, in common with most other high performance A Series camshafts, have 1/2" wide lobes.   
Ill. No. Part No. Description Qty. Rqd. Remarks
37 AEG148 CAMSHAFT, for 'pin drive' oil pump 1 1071cc and 970cc.  1275cc 1964-66.
  AEG510 CAMSHAFT, for 'pin drive' oil pump 1 1275cc 1966-69. 
  AEG542 CAMSHAFT, for 'star drive' oil pump 1 1275cc 1969-71.
38 2A299 PIN, oil pump drive 1 Included in 'pin drive' type camshafts.
39 CHM108 FLANGE, for 'star drive' oil pump (flange also known as 'spider') 1 Use with 'star drive' type camshaft.
40 12G4499 SPINDLE, distributor drive 1  
41 2A13 TAPPET, without oil hole 8 1963-68; standard size.
  2A13010 TAPPET, without oil hole 8 1963-68; +0.010" oversize.
  AEG584 TAPPET, with oil hole 8 1968-71; standard size.
  AEG584010 TAPPET, with oil hole 8 1968-71; +0.010" oversize.
  AEG584020 TAPPET, with oil hole 8 1968-71; +0.020" oversize.
Tappets with or without oil holes are interchangeable, but only in full engine sets.    
         
Ill. No. Part No. Description Qty. Rqd. Remarks
42 2A14 PUSH ROD 8 1071cc and 970cc. Alternative to 12A250 when replaced in sets.
  12A250 PUSH ROD 8 1071cc and 970cc. Alternative to 2A14 when replaced in sets.
  AEG314 PUSH ROD 8 1275cc.
         
Timing Chain      
Ill. No. Part No. Description Qty. Rqd. Remarks
43 2H4905 CHAIN, timing, duplex (double row) 1  
44 AEA696 GEAR, steel, duplex timing chain, camshaft 1 1963-70.
  12G1397 GEAR, iron, duplex timing chain, camshaft 1 1970-71.
45 WKN505 KEY, Woodruff 1  
46 6K629 NUT, gear to camshaft 1  
47 2A759 LOCK TAB, nut 1  
View as:
Show items
Items 1 to 12 of 116 total
1 2 3 4 5 6 ...
Part No: 21253030
  Awaiting Stock - On Order
126 points earn (£1.26)
£152.02 inc VAT
£126.68 ex VAT
Part No: 2H4905HD
  In Stock
 
18 points earn (£0.18)
£22.50 inc VAT
£18.75 ex VAT
Part No: 8G2391040HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391030HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391020HD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391010HD
  In Stock
 
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: 8G2391STDHD
  In Stock
25 points earn (£0.25)
£30.30 inc VAT
£25.25 ex VAT
Part No: BHM1293005
  In Stock
8 points earn (£0.08)
£10.62 inc VAT
£8.85 ex VAT
Part No: WKN505
  In Stock
1 points earn (£0.01)
£1.54 inc VAT
£1.28 ex VAT
Part No: R41570STD
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: R41570060
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Part No: R41570040
  No Longer Available
£0.00 inc VAT
£0.00 ex VAT
Add to cart
Items 1 to 12 of 116 total
1 2 3 4 5 6 ...
Request a free catalogue