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Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.


MG MGA - 18 GB head

Gentlemen, I am looking at purchasing a head which is a 1.8 MGB cylinder head Casting number 12H2389. I need one for my 3 main GB engine I plan to rebuild. I am also looking to use it in my 1600 untill then. Is this the correct head, or is this the one with the hole in the ports?
WMR Bill

Bill, I can't answer your question about the head, but 18GB is a 5 main bearing engine, not a 3. The 3 bearing 1800 engines are 18G and 18GA series.
Andy Bounsall

You may find this document of interest:

http://www.flowspeed.com/cylinder-ident.htm

Steve
Steve Gyles

Any early head from a 3 main or 5 main MGB will work, but if your MGA isn't a Mk 2 with flat top pistons, it is the wrong one for that and will give less than 8:1 compression.
Bill Spohn

This thread was discussed on 05/01/2009

MG MGA index

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