Just had to put in my $.02...
I bought a used head to dismantle and rebuild. Examining it, I have reason
to believe that the addition of the valve stem seals contributed to the
early demise of the guides. The valve stems with the seals weren't just
worn, they were galled.
Precious little oil gets to the top end of a TR anyway and I wouldn't be so
quick to discount the value of its cooling and lubricating effects on the
valve stems and guides.
Not to sound like an originality freak--'cuse I'm not--but If your TR really
needed the seals they probably would have been there originally.
Bottom line -- I think the engine will smoke less in the long run and the
guides will last longer without the seals.
The bronze valve guides seem to work very well without them. I wouldn't use
the original style iron guides in either case.
"IMVHO"
The basics of my top end rebuild can be seen on my website. Go to the "Top
End Torque" page.
Chris Lillja
'66 TR4A
'74 Norton Commando 850
'71 Spit MKIV
http://members.aol.com/lilljaweb/index.html
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