Cylinder Head 850CC, 998CC & 1100CC Pre 'A' Plus
Label Part No Description Quantity Comments
1 12A1455 Cylinder head (12A1456 head casting) 1 N.L.A - 850cc and 998cc
1 GCG1007MS Cylinder head reconditioned 1 Sold on exchange basis
1 28G193 Cylinder head (12G202 head casting) 1 N.L.A - 1100cc
2 CHS2515 Stud, water elbow outlet 3 See [LINK]C-STR285[/LINK] kit also
3 51K885 Stud, long, rocker posts and cover 2
4 51K1473 Stud, rocker posts, short 2
5 53K487 Stud, manifold 6 See [LINK]C-STR282[/LINK] kit also
6 53K402 Stud, heater valve 2 See [LINK]C-STR285[/LINK] kit also
7 12G1963 Valve guide - was 12A186/12G1111 8
8 2K1345 Oil hole plug - 850cc and 998cc, was 6K808 for 1100cc 1 C.W.E
9 2A180 Heater tap blanking plate 1 When required
10 88G221 Heater take off gasket 1
11 TAM2068 Valve seat insert exhaust 4 Lead free
11 TAM2152 Valve seat insert inlet 4 Lead free - C.W.E
12 2A877 Inlet valve large collet groove 1.095” wide 4 850cc and 998cc
12 CAM6391 Inlet valve small collet groove 1.095” wide 4 850cc and 998cc
12 12G3036 Inlet valve small collet groove 1.15” wide 4 1098cc
12 AEA574 Inlet valve large collet groove 1.15” wide 4 1098cc - C.W.E
12 AEA434 Exhaust valve large collet groove 1” wide 4 See [LINK]AEA400 better quality also[/LINK]
12 12A1987 Exhaust valve small collet groove 1” wide 4
13 AEA311 Valve spring 8
14 2A879 Valve oil seal 8
15 88G616 Top cap for large collet groove 8 Fitted until 1980
15 88G617 Top cap for small collet groove 8
16 2A11 Valve cotter pair for 88G616 large collet groove 8 N.L.A
16 88G459 Valve cotter pair for 88G617 small collet groove 8
17 2A12 Circlip for valve cotters 8 N.L.A
18 12A1950 Rocker shaft 1 Alternative [LINK]C-AEG399[/LINK]
19 12G1926 Rocker shaft post with oil hole 3
20 12G1927 Rocker shaft post tapped 1
21 2A259 Rocker post locking plate 1 N.L.A - Use [LINK]2A515[/LINK] and modify
22 2A258 Locating plug 1
23 6K556 Rocker spacer spring 3
24 2A964 Rocker pressed steel, original 1 N.L.A - Use [LINK]12G1221[/LINK] or [LINK]CAM289[/LINK]
25 12G1221 Rocker forged 8 Alternative
26 2A21 Bush 8 Not for [LINK]CAM289[/LINK]
27 CAM289 Rocker sintered non bush type 8
28 AEG167 Rocker screw 8 Thread size 5/16 UNF
28 12A1215 Rocker screw for [LINK]2A964[/LINK] 8
29 6K654 Adjuster nut for [LINK]12A1215[/LINK] 8 7/16“ AF spanner size
29 NT605061 Adjuster nut for [LINK]12G1221[/LINK] and [LINK]CAM289[/LINK] 8 1/2” AF spanner size
30 51K1193 Cylinder head nut 9
31 GFK1115 Head nut washer 8
32 GUG702506HG Head Gasket, was TAM2121 / AJM302 1 Genuine
32 GEG302 Cylinder head gasket, copper - For gasket sets see page 28 1 Non Genuine
32 C-AEA647 Cylinder head gasket, composite material, 1 For performance engines
33 2A18 Rocker shaft spring washer 2