Different heads to the A-series engine compiled by Jerker Johansson,Sweden 1987 ------------------------------------------------------------------------------- Number Inlet Outlet room Normally fitted to Fits also ----------------------------------------------------------------------------- 2A628 1 1/16" 1" 24,6cc 850 Mini, A35,A40 998,1100 and Cooper 12A1456 Minor, SpriteMkI 2A629 ------------------------------------------------------------------------------ 12A1458 1 1/16" 1" 24,6cc late 850 &998 as above but a hole in the front for temp gauge ------------------------------------------------------------------------------- 12G185 1 1/16" 1" 24,6cc 997 Cooper fits as bigvalvehead for 850 & 998 ------------------------------------------------------------------------------- 12G202 1 5/32" 1" 26,1cc Austin/Morris 1100 As above but square formed inlets
997 Cooper ------------------------------------------------------------------------------ 12G206 1 7/32" 1" 28,3cc Early MG 1100 , upgraded 12G202
early 998 Cooper ------------------------------------------------------------------------------ 12G295 1 7/32" 1" 28,3cc 998 Cooper,MG 1100 Fits on 998 when bigger Sprite MKIII valves are needed -------------------------------------------------------------------------------- 12G940 1 5/16" 1 5/32" 21,4cc 1275GT,A/M1300 Can be modified to the 9 Bolts 33,3mm 29,53mm Sprite MK IV specifications below Marina 1,3 ------------------------------------------------------------------------------- 12G940 1 13/32"1 5/32" 21,4cc Austin 1300 GT Fits on 1275 Gt when 11 Bolts 35,6mm MG 1300 MK II bigger valves are needed late Cooper S ------------------------------------------------------------------------------- AEG165 1 13/32" 1 7/32" 21,4cc Cooper S Can be used instead of 12A185 35.5mm 30.9mm the 11 bolted 12G940 AEG163 ------------------------------------------------------------------------------- 12G940 1 5/16" 1 5/32" 21,4cc Turbo MG ------------------------------------------------------------------------------- CAM4180 1.0625" 1" 25.5cc 998 Mini A+ and lead free
22 September 1996, with facts from Frans Marx
3 April 1998, Micke Pettersson
Copyright © Micke Pettersson Tiundagatan 39 S-752 34 Uppsala Sweden Phone: +46 18 50 00 93 mikael.pettersson@tsl.uu.se