Block Components & Pistons
Label Part No Description Quantity Comments
1 28G196 Block and Std pistons 850cc 1 C.W.E
1 BHM1439 Block bare 998cc A Plus 1 N.L.A
1 38G464 Block bare 1275cc ‘S’ 1
2 BHM1441MS Block bare 1275cc A Plus solid wall type 1 Used block for recon
3 2K8169 Core plug (1.625” diameter) 4 850/998/1100, not A-Plus
3 AEC876 Core plug (1.326” diameter) 5 1300cc and all A-Plus
3 AEH592 Core plug (1.647” diameter) 4 All Cooper ‘S’
4 12G3503 Oil gallery plug 2 4 required on large bore
5 2K1345 Oil release passage 2 Was TAM2009 85 on
6 CAM151 Block to head stud short 5 1 Extra for Cooper ‘S’ Qty decreased for TAM1617
6 TAM1617 Block to head stud short 1 Extra threads to hold coil
7 CAM150 Block to head stud long 4
8 CHS2613 Filter to block bolt 2 For spin on filter only
8 53K615 Filter to block stud For paper element 2 N.L.A use CAM151 or ZCS628 bolt
9 CHS2515 Petrol pump stud 2
10 2A54 Dowel - main bearing cap 6 Except 1300cc
10 12G1268 Dowel - main bearing cap 6 1300cc Except ‘S’
11 1A1964 Camshaft oil feed restrictor 1 N.L.A
12 12A1910 Mains bolt 6 Except 1300cc
12 12G1398 Mains bolt 6 1300cc
13 AEG323 Mains stud set (6 studs) 1 Cooper ‘S’ only
14 C-AJJ4013 Mains nut set (6 nuts) 1 Cooper ‘S’ only
15 12G164 Liner (SU3367) 4 Not ‘S’ or 1300cc
15 AEG428 Liner (was AEG239) SU3598 4 1300cc, all ‘S’
16 AEC3063 Camshaft liner bearings 1 1300cc, all ‘S’
16 AEC3046 Camshaft liner bearings 1 Not 1300cc, ‘S’
17 53K2853 Drain plug 1
18 6K638 Drain plug washer 1
19 3H576 Tap cylinder drain 1 N.L.A
20 2A265 Petrol pump blanking plate, (uses GUG705779GM gasket) 1
21 22H983 Engine to gearbox case dowel 1 N.L.A
22 6K927 Main bearing lock tab except Cooper ‘S’/1300cc 6
23 P15037-00 850cc Piston set 8.3 to 1 CR 1 C.W.E
23 P20773-00 998cc Piston set 4 ring 1 Std plus 20/40/60 oversizes
23 P20950-20 998cc Flat top piston,circlip gudgeon pin 1 20/40/60/80 oversizes
23 P16309 998cc Dished piston set 8.3 to 1 CR 4 N.L.A Circlip type gudgeon pin
23 ADU3490-00 998cc Flat top piston 10.3 to 1 CR - standard +20/40/60 sizes 4 Circlip type gudgeon pin available
23 P22463-00 998cc Flat top piston 10.3 to 1 CR was TAM2052 +20/40/60 4 Press fit gudgeon pin
23 P22464 998cc Dished piston 8.3 to 1 CR was TAM2054 4 N.L.A Press fit gudgeon pin
23 P20397 1100cc Dished piston 8.5 to 1 CR 1 N.L.A was P16179
23 P21250 1275cc Piston set 9.4 to 1 CR 1 N.L.A Metric ring sizes
23 P22357-40 1275cc Piston set 9.4 to 1 CR TURBO 1 Plus 40 size only
23 P21251-00 1275cc Piston 8.8 to 1 CR 1 Metric ring sizes. Std/20/40/60
23 P21253-00 1275cc Piston 9.7 to 1 CR 1 Metric ring sizes. Std/20/40/60
23 P20747 1275cc Powermax 9.7 to 1 CR (use C-AJJ3378) 1 N.L.A
23 C-AJJ3378 1275cc Mega dished piston 9.7 to 1 CR - Double heat treated 1 20/40/60 oversizes
23 C-AJJ3382 1275cc Mega flat top piston - Double heat treated 1 20/40/60 oversizes
23 C-STR312 73.5 Mega 11cc dish piston - Double heat treated 1 1380CC
23 C-STR310 73.5 Mega 7cc dish piston - Double heat treated 1 1380cc
23 P20659-00 Piston 73.5 Powermax 9cc dish 4 See C-STR311
23 C-STR311 Piston 73.5 Mar Motorsport 9cc dish (Mini Spares own) 4
24 RA8576-00 Ring sets - See piston table on page 8. 1
See next page for piston rings and ring sizes