Jim, this is news to me. There are some that will say that for a street car
the steel guides are fine and that the bronze guides are only needed for
racing applications. I fitted Richards bronze guides along with his teflon
seals to replace the bronze guides that had been installed 25 years ago. I
think there is a bit more slop in the bronze guides due to expansion
properties and the seals help reduce any tendency for oil to get past the
valves.
Stan
-----Original Message-----
From: 6pack-bounces@autox.team.net [mailto:6pack-bounces@autox.team.net] On
Behalf Of jim hearn
Sent: Tuesday, February 17, 2009 4:54 PM
To: 'TR6'
Subject: [6pack] Bronze valve guides?
I thought I had seen on some posts that bronze valve guides were the way to
go with a TR6 so now that I need to do a complete valve job, I bought bronze
guides to do it. When I took it to the machine shop (that has a good rep
for doing British stuff), I was told that they had quit putting in bronze
guides due to the extra heat in the combustion chamber caused by the new
fuel with no lead. They said that early on when they were using bronze
guides with the new fuel, due to dissimilar expansion rates for the
different metals (head and guides), guides were loosing up and falling out.
Has anyone heard this, experienced this, or have any information on this.
Is anyone running bronze guides successfully? Mine is a stock motor but if
this is true, there doesn't seem to be enough good points for the bronze to
risk the calamity. Any thoughts? Jim
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