On 4/12/2013 5:31 PM, Alan Comfort wrote:
> Hello Jerry
> I guess I already knew the answer to the first question. I expect that I will be going through the motors and gearboxes before attempting to start them up. I will look carefully at the valve seats, but I would have thought that a badly worn intake valve seat would require a new cylinder rather than a new head. All of the F head engines I have ever seen have one valve in the head and one valve in the cylinder block.
Iron cylinders are all the same, except the S cylinder only has three 3
head bolts. So only three fins are left out.. The head contains both
valves. If the engine runs, it will be OK. But don't do more than lap
the intake valve since there is only about 1/4" thickness there from the
valve to the outside. Well, you'll see what I mean when you open it
up. It isn't really an F head. More like an L head with the combustion
chamber off to the side, valve on bottom, spark plug opposite. The
exhaust valve is over left of that in the center.
The valves are interesting. They don't have keepers like you are used
to. Just a vertical slot in the stem and a wedge keeper. I like the
way the pushrods are external. Interesting to see it running. Be sure
to keep the exhaust valve rocker grease cup filled and give it a twist
now and again.
I believe I have some workshop info if you want it. The stuff I have is
for a 3-speed transmission, not the 4-speed. But the rest of the motor
is about the same. I also have gaskets for that head if you need them
(and I can find them).
JerryK