I believe all 1275 heads had this plug from the factory. The guys on the MG
Experience forum all recommend removing the old plug, threading the hole, and
then installing a tapered brass plug available at any hardware store. Then you
skim the head.
Sent from my keyboard
> On Jul 26, 2016, at 5:52 PM, Mike Rambour via Spridgets
> <email@example.com> wrote:
> Ok, I am finalizing my 1275 build and found that I did not have a head gasket
> leak, what I had was a stupid bronze/brass plug between the #2 and #3
> cylinders that is a tiny bit recessed and also leaking. When I soaked the
> head in the solvent tank, I could see solvent oozing past the plug so it
> needs to be replaced.
> I have never seen a head with a plug, my first thought is that it was
> butchered by previous owner(s) but i have been googling and found it was
> common on the 1275's which explains why I never saw one, this is my first
> So what is the best repair ? I can get it out and machine a new one to press
> in, that won't be a problem but I foresee the same problem in the future. I
> would be scared to try taking it out and threading the head myself and I
> think I would send it out for the threading part or is it pretty easy ? I
> read on one web site where the guy drove a screw through the plug all the way
> through to the other side of the water jacket (not through the jacket just
> touching it) to keep it from recessing again. I would not do that but could
> easily machine a plug with "stub" on it that would rest on the water jacket
> to keep it from recessing again. I have a lathe and mill but I am not a
> machinist, I tend to make more shavings than usable parts, I don't mind
> making a plug and skimming the head but threading cast iron myself seems like
> asking for trouble, but maybe its not if the head is thick enough.
> A gun is like a parachute, if you need one but don't have it,
> you'll probably never need one again.
> Donate: http://www.team.net/donate.html
> Suggested annual donation: $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums