Assuming I'm facing the "time to change to an unleaded
head" situation, I'm curious which would be the more efficient
solution. Have the original head on my engine overhauled and
refitted with hardened valve seats and the appropriate valves,
or simply buying a ready-made, complete unleaded head from
Rovers North, etc. I like the idea of a bolt-on solution, as
opposed to running around hunting up a competent shop,
collecting the necessary parts, etc. How common a procedure
is this (the installation of hardened valve seats in a head with
machined-in seats), and what sort of shops tend to do this
kind of work?
It appears a complete unleaded head (stock head,
not some sort of semi-performance head) runs
in the neighborhood of $1,000 by the time it's all
said and done and shipped. Is having an existing
head overhauled and set up for unleaded fuel that
much less by the time it's over? I assume in addition
to the parts and shop labor, it would be prudent to have
the head magafluxed or zyglowed (or both) to make
sure it's okay, and so on.
I'm willing to pay more for a solution that I don't have
to tinker with and worry about and re-fix or have re-fixed
later, which is why I tend to lean toward the bolt-on unleaded
head. But I'd be interested in hearing the advantages, if any,
of having the existing head overhauled.
___________________________
C. Marin Faure
(original owner)
1973 Land Rover Series III-88
1991 Range Rover Vogue SE
Seattle
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