Cylinder Head Cooper 'S' 970CC, 1071CC & 1275CC
Label Part No Description Quantity Comments
1 12G1805 Cylinder head (12G940) casting 1 N.L.A - 35mm inlet/29mm exh
1 38G360 Cylinder head (AEG163) casting 1 N.L.A - 35mm inlet/31mm exh
2 CHS2515 Stud, water elbow outlet 3 See [LINK]C-STR281[/LINK] alternative
3 51K885 Stud, rocker cover long 2
4 51K1473 Stud, rocker cover short 2
5 53K487 Stud, manifold 6 See [LINK]C-STR282[/LINK] alternative
6 53K402 Stud, heater tap 2 See [LINK]C-STR285[/LINK] also
7 C-AHT281 Extra cylinder head bolt, was AEG248 1
8 12G1963 Valve guide, tapered nose 8
8 C-AJJ4037 Bronze hidural valve guide, when EN214N valves fitted 1 AEG163 casting / race heads
9 2K1345 Oil hole plug 1
10 12G2092 Water hole plug 3 N.L.A
11 AEA771 Water and dowel hole plug 2
12 12G3503 Cleaning hole plug, was CAM4133 & 12H1734 2
13 2A180 Heater take-off blanking plate 1 When required
14 88G221 Heater tap gasket 1
15 12G1089 Inlet valve insert seat 4 N.L.A
15 12G2675 Exhaust valve insert, leaded N.L.A 4 Use [LINK]TAM2069[/LINK] for lead free insert
16 AEG593 Inlet valve EN214N material 35.6mm (1.4”) short stem length 4 AEG163 casting only
16 AEG592 Inlet valve 35.6mm (1.4”) Long stem valve 4 12G940 casting only
16 AEG594 Exhaust valve EN214N material 31mm (1.21”) short stem length 4 AEG163 casting
16 AHU1049 Exhaust valve 29.2mm (1.15”) diameter (long stem) was 12G1322 4 12G940 casting
17 AEA767 Outer valve spring 8 N.L.A - See kits [LINK]C-AEA525[/LINK]/[LINK]C-AEA526[/LINK]
17 C-AEA525 Inner and outer valve spring set 1
17 C-AEA526 Inner and outer valve spring set - Race 1
18 12G1137 Inner valve spring 8 N.L.A - See kits [LINK]C-AEA525[/LINK]/[LINK]C-AEA526[/LINK]
19 88G617 Top cap 8 See [LINK]AEA653[/LINK] stronger cap
19 AEA653 Top cap, steel (was “W” stamped) 8 Cooper ‘S’
20 AEA403 Bottom cap 8 Use [LINK]C-AEA654[/LINK] alternative
21 AEG327 Valve oil seal, inlets valves only on MK3 ‘S’ 8 Or as required
21 LJQ101160 Top hat seal - Dupont Viton 4 Alternative upgrade/ as required
22 88G459 Valve cotter 16 8 pair
23 12A1950 Rocker shaft 1
23 C-AEG399 Rocker shaft performance 1
24 12G1926 Rocker shaft post with oil hole 3
25 12G1927 Rocker shaft post tapped 1
26 AEG168 Spacer rocker shaft .040” 1 Or as required
26 AEG169 Spacer rocker shaft .010” 1 Or as required
27 2A259 Rocker post locking plate 1 N.L.A - Use [LINK]2A515[/LINK] & modify hole
28 2A258 Locating plate plug 1
29 6K556 Rocker spacer spring 3
30 12G1221 Rocker, forged 8
31 2A21 Rocker bush 8
32 AEG167 Rocker adjusting screw 8
33 NT605061 Rocker adjusting nut 8
34 GEG300 Head gasket, copper 1
34 GUG702560HG Head gasket, AF470 was GUG2507HG 1 Has sealing ring for rocker oil feed
34 TAM1521 Cylinder head gasket, BK450 - For gasket sets see page 28 1 Original Black in colour
35 51K1193 Cylinder head nut 10
36 GFK1115 Washer 10 Was PWN106
37 MSSK061 Cylinder head ancillary stud and nut kit 1
38 2A18 Rocker shaft spring washer 2