Technical Information (MGA 6)

03/05/01 MGA CYLINDER HEADS

We will try and provide you with information on the OEM style cylinder heads fitted to the MGA 1500 1600 and 1622cc engine blocks.

MGA1500cc
Combustion Chamber cc 38.2cc to 39.2cc
Intake Valve Dia 1.5"
Exhaust Valve Dia 1.9/32”

MGA 1600cc
Combustion Chamber cc 38.7cc
Intake Valve Dia 1.5"
Exhaust Valve Dia 1.9/32”

MGA1622
Identification casting number 12H432 with raised #16 stamped at the rear of the cylinder head on the spark plug side.
Combustion Chamber cc 43cc
Combustion Chamber Depth .425"
Intake Valve Dia 1.565"
Exhaust Valve Dia 1.345"

OEM STYLE REPLACEMENT ALUMINUM CYLINDER HEADS

These cylinder heads (smog or non-smog) are a direct replacement for the OEM style and also fit the MGB, however, when installing this cylinder head to your existing cylinder block the later MGB cylinder head gasket part GEG377 should be used. Do not use the original style gasket. Using this gasket will result in the gasket bore periphery-sealing edge intruding well into the combustion chamber area, resulting in head gasket failure.