9C ENGINE
CYLINDER HEAD DETAILS
  ..Head assembly--cylinder..................NSP..............1..Was 28G 86
Head--cylinder (with guides, plugs, and
 1..studs)...................................28G 161..........1

GUIDE-VALVE
 2..Inlet-standard...........................2A 608...........4
 2..Inlet-.010" (.254 mm) 0/S................2A 0608 10.......4
 3..Exhaust-standard.........................2A 608...........4
 8..Exhaust-.010" (.254 mm) 0/S..............2A 0608 10.......4
 4..Plug-oil hole............................6K 808...........1..W.S.E. use 2K 1345
 4..Plug-oil hole............................2K 1345..........1

STUD
 5..Rocker bracket-long......................51K 885..........2
 6..Rocker bracket-short.....................51K 554..........2..(E)9C/U/H101 to H39894
 6..Rocker bracket-short.....................CHS 0522.........2..(E)9C/U/H39895 to H41829
 6..Rocker bracket-short.....................51K 1473.........2..(E)9C/U/H41830 on
 9..Exhaust manifold-long....................FLS 2513.........2............................W.S.E. use FHS 2513
 9..Exhaust manifold-long....................FHS 2513.........2..(E)9C/U/H101 to H39894....Use 6 off 53K 487 for this
 8..Exhaust manifold-medium..................53K 487..........22...........................application
 7..Exhaust mamifold-short                   53K 486..........2
 8..Exhaust manifold-medium..................53K 487..........6..(E)9C/U/H39895 on                       
10..Cover plate..............................53K 402..........2                                         
11..Water outlet elbow.......................53K 530..........3                                          

INSERT-VALVE SEAT
12..Inlet-standard...........................2A 639...........4..Alternatives. Inserts
12..inlet--1/16" (1.58 mm) O/S...............AEA 762..........4..must be all standard
  ...............................................................or all oversize, not
  ...............................................................mixed

13..Exhaust-standard.........................2A 640...........4..Alternatives. Inserts
13..Exhaust-1/16" (1.58 mm) O/S..............AEA 763..........4..must be all standard
  ...............................................................or all oversize, not
  ...............................................................mixed

VALVE
14..Inlet....................................2A 6.............4..(E)9C/U/H101 to H1396             
15..Exhaust..................................AEA 327..........4   
14..Inlet....................................2A 877...........4..(E)9C/U/H1397 on

15..Exhaust..................................AEA 358..........4..(E)9C/U/H1397 to H36899.....W.S.E. use AEA 400
15..Exhaust..................................AEA 434..........4..(E)9C/U/H36900 on...........Use AEA 400 for this
  ...........................................................................................application
                                                          
16..Spring-valve.............................ABA 311..........8
17..Shroud-valve guide.......................2A 544...........8
18..Seal-oil valve...........................2A 9.............8
19..Shroud~valve guide.......................2A 545...........8..(E)9C/U/H1397 on
20..Ring-valve packing (rubber)..............2A 879...........8
21..Cup-valve spring.........................2A 10............8..(E)9C/U/H101 to H1396
22..Cup-valve spring.........................2A 880...........8..(E)9C/U/H1397 on                          
23..Cotter-valve.............................2A 11............16
24..Circlip-valve cotter.....................2A 12............8
25..Shaft assembly-valve rocker..............NSP.........1..Was 2A 15
26..Shaft-valve rocker-plugged...............2A 16.......1                                          
27..Plug.....................................6K 878......1                                        
28..Plug.....................................2K 4608.....1

BRACKET-ROCKER SHAFT
29..Plain....................................2A 23.......3..W.S.E. use 12G 1110
29..Plain....................................12G 1110....3                                           
30..Tapped...................................2A 22.......1..W.S.E. use 12G 1109
30..Tapped...................................12G 1109....1                                          
31..Rocker-valve-bushed......................2A 964......8..Alternatives; interchange-
32..Rocker valve-bushed......................2A 533......8..able in sets only
33..Bush-valve rocker........................2A 21.......8                                 
  ..Rivet....................................5C 2436.....8                                              
34..Spring-rocker spacing....................6K 556......3                                              
35..Screw-tappet adjusting...................2A 535......8..W.S.E. use 12A 1115
35..Screw-tappet adjusting...................12A 1215....8
36..Locknut..................................6K 654......8                                             
37..Screw-rocker shaft-locating..............2A 258......1                                             
38..Plate-rocker shaft bracket...............2A 515......4                                        
39..Washer-spring............................2A 13.......2                                  
40..Washer...................................6K 555......2                                         
41..Washer-spring............................LWN 205.....4                                    
42..Nut......................................FWN 1O5.....4                                         
43...........................................53K 371.....9..W.S.E. use 51K 371
44..Washer-spring............................LWN 205.....4                                   
45..Washer-plain.............................PWN 106.....5
46..Gasket-cylinder head.....................2A 689......1..(E) 9C/U/H1O1 to H1167   
46...........................................2A 935......1..(E) 9C/U/H1168 to H6732  W.S.E. use 12G 293
46...........................................2A 971......1..(E) O/U/H6733 on
46...........................................12G 293.....1

47..Plate-cover-heater tap facing............2A 180...........1                                          
48..Gasket-plate.............................88G 221..........1..Part No. change; was
  ...............................................................2A 179 and 12A 32
49..Washer-spring............................LWN 304..........2                                    
50..Nut......................................FNZ 104..........2