Bob---Do not be too concerned about using unleaded gas. Unless you are
really going to pound on this engine, w/heavy valve springs and such,
you won't know the difference. I've used this no-lead since 1989, or
about 150,000 more miles, with no valve seat recession to speak of.
Recession should show up, if it's going to, as a loss in valve lash. So
if your valve clearances haven't been tightening up, save your money.
It's also the opinion of many that the stock, integrated seats cool the
valves better than hardened inserts. Seems reasonable.
The use of adding a "lead" substitute would also seem like overkill to a
problem that may not exist.
Dick
Bob wrote:
Subject: Valve guides and seats?
Sorry about all the newbie questions guys, but my wife was away all all
day and I spent the day with the 250 and compiled a bit of ??'s.
The engine issue is looming and my thoughts of the rebuild lead me to
the issue of Leaded Fuel vs Unleaded. I know there are many lead
products like ReLead etc.. but I'm also considering the solution of
Valve Guides and Seats to accommodate the high temps and corrosion of
running no-lead fuel.
Your input is, again, appreciated.
I only receive the Digest, so if you post a reply, please cc my direct
e-mail.
Thanx
Bob
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