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MGA Part Numbers - 12H
PART NO.  SPL.PAGE  DESCRIPTION                                                           
12H14     16.A.2    Ring -compression -top (standard) (4) -(engine unit, 1600)
12H15     16.A.2    Ring -compression -2nd and 3rd (standard) (8) -(engine unit, 1600)
12H16     16.A.2    Ring -scraper (standard) (4) -(engine unit, 1600)
12H17     16.A.2    Pin -gudgeon (standard) (4) -(engine unit, 1600) -changed to 12H179
12H18     16.A.6    Joint -cylinder head -(engine unit, 1600) -changed to 12H433
12H24     TC.A.7    Joint for cover (2) -(cylinder side covers, engine, Twin Cam) -was
    1A2203
12H37     sup.7     Washer -joint -rocker cover -(engine unit, sup)
12H37     16.A.6    Washer -joint -rocker cover -(engine unit, 1600) (was 11G300)-
    Alternate 1H1329
12H37     16.A.6    Washer -joint -rocker cover -(engine unit, 1600) (was 1H1329)-
    Alternate 11G300
12H37     16.A.27   Joint -cover -(rocker.cover, engine unit, 1622)
12H38     15.A.6    Joint washer for valve cover -(engine unit, 1500) -Com(E)GD101
  [alt 1H1329, 11G300]
12H51     16.B.2    Bracket -coil mounting -(ignition, 1600 all round disc brakes model)
    Com.)C)91240
12H54     16.A.3    Crankshaft -(engine unit 1600) -changed to 12H165 Com,(E)16GA/H21805
12H60     sup.6     Washer -joint -cylinder head -(engine unit, sup)
12H67     16.A.12   Link -dynamo adjusting -(eng.unit, 1600) -alternator to 2A497
12H67     16.A.32   Link -dynamo adjusting -(eng.unit, 1622) -was 2A497
12H71     16.A.12   Pulley -dynamo -(engine unit, 1600) Com.(E)16GA/H6396 -(was 1H998)
12H71     16.A.32   Pulley -dynamo -(engine unit, 1622) -changed to 12H1178
12H74     sup.9     Rod -oil level indicator -(engine unit, sup)
12H74     16.A.9    Rod -oil level indicator -(engine unit, 1600) -Com.(E)16GA/H9649-
    (was 11G64)
12H74     16.A.30   Rod -oil level indicator -(engine unit, 1622)
12H90     16.B.3    Clip -(vac.pipe to cyl.head, vacuum control, ignition, 1600)
12H91     16.A.3    Connecting rod and cap -Nos. 2 and 4 cyl's (2) -Com.(E)16GA/H21705-
    (was 1H701)
12H93     16.A.3    Connecting rod and cap -Nos. 1 and 3 cyl's (2) -Com.(E)16GA/H21705-
    (was 1H703)
12H137    15.A.6    Elbow -water outlet [Fin (E) GB7537] (change to 1H727)
12H152    sup.8     Plate -side cover blanking (2) -(engine unit, sup)
12H152    16.A.7    Cover -cylinder -side -rear -(engine unit, 1600) (Com.(E)16GA/H25740)-
    (was 2A770) -(alternate 12H941)
12H152    16.A.28   Cover -cylinder side -rear -(engine unit, 1622) -12H152 not available
    use 12H941
12H155    TC.A.7    Cover -cylinder side (rear) -(engine, Twin Cam) -was 1A2199
12H156    16.A.7    Cover -cylinder side -front (with elbow) -(engine unit, 1600)-
    Com.(E)16GA/H25740 -(was 1H873) -(alternate 12H950)
12H156    16.A.28   Cover -cylinder side -front (with elbow) -(engine unit, 1622)-
    changed to 12H950 -12H156 not available use 12H950
12H165    16.A.3    Crankshaft -(engine unit 1600) -Com,(E)16GA/H21805 -(was 12H54)
12H173    ST.       Piston assembly -flat head -9.25:1 ratio -(racing and competition
    equipment, 1600)
12H179    16.A.2    Pin -gudgeon (standard) (4) -(engine unit, 1600) -(was 12H17)
12H373    16.B.1    Distributor -(engine unit, 1600) -Com.(E)16GC/H101 -not available use
    12H822
12H458    16.B.1    Distributor -(engine unit, 1600) -Com.(E)16GC/L1012, H4004
12H389    16.A.26   Bracket -rocker shaft (tapped) -(engine unit, 1622)
12H390    16.A.26   Bracket -rocker shaft (plain) (3) -(engine unit, 1622)
12H395    sup.9     Reservoir -oil -(engine unit, sup)
12H395    16.A.9    Reservoir -oil -(engine unit, 1600) -(was 1G2508)
12H395    16.A.30   Reservoir -oil -(engine unit, 1622)
12H397    sup.9     Washer -joint -oil reservoir -(engine unit, sup)
12H397    16.A.30   Joint -reservoir to crankcase -(oil, engine unit, 1622) -changed to
 88G256
12H398    16.A.29   Strainer -oil -(engine unit, 1622) -12H398 not available use 12H984
12H424    16.A.24   Connecting rod and cap nos. 2 and 4 cylinders (2) -(engine unit, 1622)
12H426    16.A.24   Connecting rod and cap nos. 1 and 3 cylinders (2) -(engine unit, 1622)
12H428    16.A.24   Crankshaft -(engine unit, 1622)
12H433    16.A.6    Joint -cylinder head -(engine unit, 1600) -(was 12H18)
12H433    16.A.26   Joint -cylinder head -(engine unit, 1622)
12H434    16.A.26   Guide -inlet valve (4) -(cyl.head, engine unit, 1600)
12H435    16.A.26   Valve -inlet (4) -(cyl.head, engine unit, 1622)
12H436    16.A.26   Valve -exhaust (4) -(cyl.head, engine unit, 1622)
12H439    16.A.22   Ring -compression -top (standard) -(engine unit, 1622)
12H440    16.A.22   Ring -compression -2nd and 3rd (standard) (8) -(engine unit, 1622)
12H441    16.A.22   Ring -scraper (standard) (4) -(engine unit, 1622)- new part no.12H855
    -12H441 not available use 12H855
12H442    16.A.22   Pin -gudgeon (standard) (4) -(engine unit, 1622)
12H514    16.A.33   Cylinder line Mk-II (1) -(engine unit, 1622) -Com.(E)100352
12H525    16.A.22   [Piston assembly -standard L.C. (4) -(engine unit, 1622)-
    Fin.(E)16GC/L126 not available; use 12H045503 or 12H045506 in sets
22H579    16.E.1    Plate assembly -driven -(clutch, 1600) Com.(E)16GC/H3929- not
    available use 13H2020
12H587    16.A.25   Flywheel -(with starter ring and dowels, engine unit, 1622)-
    Com.(E)16GC/3708 -was 1H651
12H587    16.A.28   Seal - oil (rubber) -(front.cover, engine unit, 1622)-
    Com.(E)16GC/8263 
12H773    16.A.25   Pulley -crankshaft -(engine unit, 1622) -Com.(E)16GC/8263 -was 11G81
12H775    16.A.25   Thrower -oil -crankshaft front  -Com (e) 16GC/8263 (1622 engine)
                    -was 1A1546
12H830    sup.7     Elbow -water outlet -(engine unit, sup)
12H830    16.A.31   Pump assembly -water (with hub less pulley, engine unit, 1622)-
	was 1H1149
12H839    sup.11    Pump assembly -water (with hub less pulley) -(engine unit, sup)
12H839    16.A.11   Pump assembly -water (with hub less pulley) -(engine unit, 1600)-
    (alternate for 1H1149)
12H850    16.B.1    Distributor -(engine unit, 1600) -Com.(E)16GC/H8422
12H855    16.A.22   Ring -scraper (standard) (4) -(eng.unit, 1622)- new part -was 12H441
12H941    16.A.7    Cover -cylinder -side -rear -(engine unit, 1600) (Com.(E)16GA/H25740)-
    (was 2A770) -(alternate 12H152)
12H941    16.A.28   Cover -cylinder side -rear -(engine unit, 1622) -was 12H152 -12H152
    not available use 12H941 
12H950    16.A.7    Cover -cylinder side -front (with elbow) -(engine unit, 1600)-
    Com.(E)16GA/H25740 -(was 1H873) -(alternate 12H156)
12H950    16.A.28   Cover -cylinder side -front (with elbow) -(engine unit, 1622)-
   (was 12H156)
12H984    sup.9     Strainer -oil -(engine unit, sup)
12H984    16.A.8    Strainer -oil -(engine unit, 1600) -(was 1H1192)
12H984    16.A.29   Strainer -oil -(engine unit, 1611) -(was 12H398)
12H1178   16.A.32   Pulley -dynamo -(engine unit, 1622) -was 12H71
12H1306   16.A.25   Push-rod (8) -(engine unit, 1622) -alternate 11G241
12H1387   16.A.2    Plate -engine mounting -(engine mtg.plate, 1600) -(was 11G96)
12H001203  16.A.1   Piston assembly -standard -grade 3 (4) -(block assy, eng.unit, 1600)
12H001206  16.A.1   Piston assembly -standard -grade 6 (4) -(block assy, eng.unit, 1600)
12H001213  16.A.1   Piston assembly -.010" (.254mm) O/S grade 3 (4) -(engine unit, 1600)-
    changed to 12H017813 -12H001213 not available use 12H017813 or 12H017816
12H001223  16.A.1   Piston assembly -.020" (.508mm) O/S grade 3 (4) -(engine unit, 1600)-
    changed to 12H017823 -12H001223 not available use 12H017823 or 12H017826
12H001233  16.A.1   Piston assembly -.030" (.762mm) O/S grade 3 (4) -(engine unit, 1600)-
    changed to 12H017833 -12H001233 not available use 12H017833 or 12H017836
12H001243  16.A.1   Piston assembly -.040"(1.016mm) O/S grade 3 (4) -(engine unit, 1600)
12H001410  16.A.2   Ring -compression -top -.010"(.254mm) O/S (4) -(engine unit, 1600)
12H001420  16.A.2   Ring -compression -top -.020"(.508mm) O/S (4) -(engine unit, 1600)
12H001430  16.A.2   Ring -compression -top -.030"(.762mm) O/S (4) -(engine unit, 1600)
12H001440  16.A.2   Ring -compression -top -.040"(1.016mm)O/S (4) -(engine unit, 1600)
12H001510  16.A.2   Ring -compression -2nd and 3rd -.010"(.254mm) O/S (8) -(eng.unit, 1600)
12H001520  16.A.2   Ring -compression -2nd and 3rd -.020"(.508mm) O/S (8) -(eng.unit, 1600)
12H001530  16.A.2   Ring -compression -2nd and 3rd -.030"(.762mm) O/S (8) -(eng.unit, 1600)
12H001540  16.A.2   Ring -compression -2nd and 3rd -.040"(1.016mm)O/S (8) -(eng.unit, 1600)
12H001610  16.A.2   Ring -scraper -.010"(.254mm) O/S (4) -(engine unit, 1600)
12H001620  16.A.2   Ring -scraper -.020"(.508mm) O/S (4) -(engine unit, 1600)
12H001630  16.A.2   Ring -scraper -.030"(.762mm) O/S (4) -(engine unit, 1600)
12H001640  16.A.2   Ring -scraper -.040"(1.016mm) O/S(4) -(engine unit, 1600)
12H001702  16.A.2   Pin -gudgeon .002" (.0508mm) O/S (4) -(engine unit, 1600)-
    changed to 12H017902
12H001704  16.A.2   Pin -gudgeon .004" (.1016mm) O/S (4) -(engine unit, 1600)-
    changed to 12H017904
12H001706  16.A.2   Pin -gudgeon .006" (.1524mm) O/S (4) -(engine unit, 1600)-
    changed to 12H017906
12H017813  16.A.1   Piston assembly -.010" (.254mm) O/S grade 3 (4) -(engine unit, 1600)-
    (was 12H001213)
12H017816  16.A.1   Piston assembly -.010" (.254mm) O/S grade 6 (4) -(engine unit, 1600)
12H017823  16.A.1   Piston assembly -.020" (.508mm) O/S grade 3 (4) -(engine unit, 1600)-
    (was 12H001223)
12H017826  16.A.1   Piston assembly -.020" (.508mm) O/S grade 6 (4) -(engine unit, 1600)
12H017833  16.A.1   Piston assembly -.030" (.762mm) O/S grade 3 (4) -(engine unit, 1600)-
    (was 12H001233)
12H017836  16.A.1   Piston assembly -.030" (.508mm) O/S grade 6 (4) -(engine unit, 1600)
12H017866  16.A.1   Piston assembly -.020" (.508mm) O/S grade 6 (4) -(engine unit, 1600)
12H017902  16.A.2   Pin -gudgeon .002" (.0508mm) O/S (4) -(engine unit, 1600)-
    (was 12H001702)
12H017904  16.A.2   Pin -gudgeon .004" (.1016mm) O/S (4) -(engine unit, 1600)-
    (was 12H001704)
12H017906  16.A.2   Pin -gudgeon .006" (.1526mm) O/S (4) -(engine unit, 1600)-
    (was 12H001706)
12H2639    16.B.1   Terminal bush and lead -(distributor, 1600) -for use with 12H822
12H043703  16.A.22  Piston assembly -standard -grade 3 H.C. (4) -(engine unit, 1622)
12H043706  16.A.22  Piston assembly -standard -grade 6 H.C. (4) -(engine unit, 1622)
12H043713  16.A.22  Piston assembly .010" (.254mm) o/s grade 3 H.C (4) -(engine unit, 1622)
12H043716  16.A.22  Piston assembly .010" (.254mm) o/s grade 6 H.C (4) -(engine unit, 1622)
12H043723  16.A.22  Piston assembly .020" (.508mm) o/s grade 3 H.C (4) -(engine unit, 1622)
12H043726  16.A.22  Piston assembly .020" (.508mm) o/s grade 6 H.C (4) -(engine unit, 1622)
12H043733  16.A.22  Piston assembly .030" (.762mm) o/s grade 3 H.C (4) -(engine unit, 1622)
12H043736  16.A.22  Piston assembly .030" (.762mm) o/s grade 6 H.C (4) -(engine unit, 1622)
12H043743  16.A.22  Piston assembly .040"(1.016mm) o/s grade 3 H.C (4) -(engine unit, 1622)
12H043746  16.A.22  Piston assembly .040"(1.016mm) o/s grade 6 H.C (4) -(engine unit, 1622)
12H043910  16.A.22   Ring -compression -top .010 (.254mm) o/s (4) -(engine unit, 1622)
12H043920  16.A.22   Ring -compression -top .020 (.508mm) o/s (4) -(engine unit, 1622)
12H043930  16.A.22   Ring -compression -top .030 (.760mm) o/s (4) -(engine unit, 1622)
12H043940  16.A.22   Ring -compression -top .040(1.016mm) o/s (4) -(engine unit, 1622)
12H044010  16.A.22   Ring -compression -2nd and 3rd .010" (.254mm)o/s (8) -(eng.unit, 1622)
12H044020  16.A.22   Ring -compression -2nd and 3rd .020" (.508mm)o/s (8) -(eng.unit, 1622)
12H044030  16.A.22   Ring -compression -2nd and 3rd .030" (.762mm)o/s (8) -(eng.unit, 1622)
12H044040  16.A.22   Ring -compression -2nd and 3rd .040"(1.016mm)o/s (8) -(eng.unit, 1622)
12H044110  16.A.22    Ring -scraper .010" (.254mm)o/s (4) -(engine unit, 1622)- 
    new part no.12H085510 -12H044110 not [available use 12H085510
12H044120  16.A.22    Ring -scraper .020" (.508mm)o/s (4) -(engine unit, 1622)- 
    new part no.12H085520 -12H044120 not [available use 12H085520
12H044130  16.A.22    Ring -scraper .030" (.762mm)o/s (4) -(engine unit, 1622)- 
    new part no.12H085530 -12H044130 not [available use 12H085530
12H044140  16.A.22    Ring -scraper .040"(1.016mm)o/s (4) -(engine unit, 1622)- 
    new part no.12H085540 -12H044140 not [available use 12H085540
12H044202  16.A.22    Pin -gudgeon .002" (.0508mm)o/s (4) -(engine unit, 1622)
12H044204  16.A.22    Pin -gudgeon .004" (.1016mm)o/s (4) -(engine unit, 1622)
12H044206  16.A.22    Pin -gudgeon .006" (.1514mm)o/s (4) -(engine unit, 1622)
12H045503  16.A.21  Piston assembly -standard -grade 3 L.C (4) -(engine unit, 1622)-
    Com.(E)16GC/L127 -was 12H525
12H045506  16.A.22  Piston assembly -standard -grade 6 L.C (4) -(engine unit, 1622)
12H045513  16.A.22  Piston assembly .010" (.254mm) o/s grade 3 L.C (4) -(engine unit, 1622)
12H045516  16.A.22  Piston assembly .010" (.254mm) o/s grade 6 L.C (4) -(engine unit, 1622)
12H045523  16.A.22  Piston assembly .020" (.508mm) o/s grade 3 L.C (4) -(engine unit, 1622)
12H045226  16.A.22  Piston assembly .020" (.508mm) o/s grade 6 L.C (4) -(engine unit, 1622)
12H045533  16.A.22  Piston assembly .030" (.762mm) o/s grade 3 L.C (4) -(engine unit, 1622)
12H045236  16.A.22  Piston assembly .030" (.762mm) o/s grade 6 L.C (4) -(engine unit, 1622)
12H045543  16.A.22  Piston assembly .040"(1.016mm) o/s grade 3 L.C (4) -(engine unit, 1622)
12H045246  16.A.22  Piston assembly .040"(1.016mm) o/s grade 6 L.C (4) -(engine unit, 1622)
12H085510  16.A.22  Ring -scraper .010" (.254mm)o/s (4) -(engine unit, 1622)- 
    new part no, was 12H044110
12H085520  16.A.22  Ring -scraper .020" (.508mm)o/s (4) -(engine unit, 1622)- 
    new part no, was 12H044120
12H085530  16.A.22  Ring -scraper .030" (.762mm)o/s (4) -(engine unit, 1622)- 
    new part no, was 12H044130
12H085540  16.A.22  Ring -scraper .040"(1.016mm))o/s (4) -(engine unit, 1622)- 
    new part no, was 12H044140
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