Bill, I have only been doing them on the exhaust, since that is for the most
part where any valve recession should occur. I have noticed, however, that
when I do not run air cleaners I have some intake valve recession. I think
another challenge on the intake side to to get it to blend well enough not to
interfere with intake flow. Joe(B)
-- WEmery7451@aol.com wrote:
Dear FOT,
Whenever my machinist has set up a TR-3/4 engine head for me, he
automatically puts in harden valve seats for both the intake and exhaust
valves
. I gave
one of my engine heads to Dan Styduhar, who has been helping me with the
TR-3.
His machinist highly recommends not to put the harden valve seats in for the
intake valve. A lot of material is ground out the cast iron head to install
the valve seats, and there is not a lot of material between the intake and
exhaust valves to begin with.
My initial guesses would be:
-There are two different materials involved -- cast iron and steel. Maybe
the steel valve seats would not count as material being replaced, and that
the
cast iron could crack under the seats.
-If there is not a great deal of exhaust gasses blowing past the closed
intake valves, the intake valves would not need the harden seats -- keeping
in
mind
that there is a tremendous pressure surge during the combustion stroke.
Does anyone have any thought on this subject?
**************************************
See what's new at http://www.aol.com
Fot mailing list
Fot@autox.team.net
http://autox.team.net/mailman/listinfo/fot
_____________________________________________________________
Click for free info on rehab treatments for drug & alcohol dependency.
http://thirdpartyoffers.netzero.net/TGL2211/fc/Ioyw6ijmXabC59PFdUwCqov8km3B4y
M40dcPLX3YCSvcpyq7RYnpLq/
_______________________________________________
http://www.team.net/donate.html
Fot mailing list
Fot@autox.team.net
http://autox.team.net/mailman/listinfo/fot
|