One thing to be aware of is that putting hardened seats in a head introduces
a thermal break that makes the seat and valve run hotter than before. The
seat and valve material should be chosen with this in mind, but if cheaper,
although still harder materials than the original are used you can get
problems. This is at least the third case of problems with a modified head
I have come across in recent months.
PaulH.
----- Original Message -----
From: "Aaron Whiteman" <aaronw@wsu.edu>
To: "MG Mailing List" <mgs@autox.team.net>
Sent: Tuesday, January 06, 2004 5:28 PM
Subject: head advice needed
> In the 3 degree heat last Sunday, I discovered that I have no
> compression in my #2 cylinder.
>
> I have the original 1975 18V block, with an earlier head. I have no
> idea what specific year the head is for, but it lacks air injection
> ports. The previous owner told me that the engine was rebuilt with
> valves and seats that were compatible with unleaded fuel.
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