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12G940 / 12G938 Cylinder head

Posted: Mon Oct 27, 2008 8:10 pm
by WPR678B
I have just dug out a cylinder head that i took off a 1275 Midget engine a few years back and it is a 12G940 casting, but has 12G938 and the letter "U" stamped near the thermostat housing :o
The stamping looks original and similar to that i have seen on 11 stud Mini heads, but this is a 9 stud head and the only none standard thing i can see is that it is fitted with double valve springs :-?
Any idea's as i know some of you are hot on the head numbers! :lol: :wink:

Posted: Mon Oct 27, 2008 11:05 pm
by Rob_Jennings
9 stud? double springs? cooper s head at a guess?

quick google kicks up the following quote:
The 12G938 is the original head fitted to the early 1275s

`12G938' is a 12G940 casting, 1.312 inlets, 1.156 exhausts, used on common 1275.

that might match up with taking it of a midget block

Posted: Mon Oct 27, 2008 11:37 pm
by rayofleamington
9 stud? double springs?
my midget engine was the same.
[Not looked at my latest midget engine properly apart from to sigh and wish for more time.]

Posted: Wed Oct 29, 2008 7:08 pm
by WPR678B
Thanks for that! :D :wink:

Posted: Wed Oct 29, 2008 8:29 pm
by bmcecosse
Not heard of the '938' version - but as the others say - it looks like Midget head because of the double springs. Standard size valves - so NOT the bigger inlet valved MG Metro head (which was also 9 hole) or the similar S head which was 11 hole!

Posted: Thu Oct 30, 2008 3:00 am
by Bazzalucas
My Moggie has a Midget 1275 of around 1973 vintage, with 9 studs and double valve springs.