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Valve Seals For Farmall H

W

Wayne Mo

Member
I will try to install valve seals for my smoking Farmall H without removing the heads.
Where can I get them and are there different styles or quality seals. I assume they must fit the valve stems tightly and cover the guides during operation. I guess you measure the valve lift and install the seal where it will just bottom out on the guide at the max lift. Shouldn't there be some means to hold the seal securely so it does not ride up or something during operation.
 
WHY are you trying to re-engineer a product that has worked just fine without valve stem seal for 50+ years???

If you feel you MUST install them, it should not be too tough to find some that will fit, by dimension, in the Sealed Power Catalog.

The are "umbrella seals"... they fit snug on the valve stem, and move up and down with the valve. They DO NOT have to fit snuggly on the guide.
 
Seals of the Perfect circle type do grip the guide top and slide on the stem. They work well and meter oil into the guide. Umbrella seals just ride on the stem, and are simple.
Re engineering is not a bad thing to do. If we didn't we would seek out old non-detergent marginal oil and use it, We do not. The PC seals can be specified by a competant parts person at a MAJOR parts store, not a box store. JimN
 
Wayne,
I have several thoughts on this and they are worth exactly what you paid for them.
1. Very little oil gets to the head, so smoking other than a little at start up or high vacuum, is PROBABLY rings.
2. If the smoking is really, truly, absolutely from the valve guides, then they are worn enough they should be replaced. Years ago when money was tight the guides were "knurled", but that involved valve/head removal.
 
The umbrella seals are easy to put on, but the Perfect Circle seals require machining to insure that the seal inner circumference is concentric with the hole in the guide.
 
(quoted from post at 11:30:01 08/14/08) Wayne,
I have several thoughts on this and they are worth exactly what you paid for them.
1. Very little oil gets to the head, so smoking other than a little at start up or high vacuum, is PROBABLY rings.
2. If the smoking is really, truly, absolutely from the valve guides, then they are worn enough they should be replaced. Years ago when money was tight the guides were "knurled", but that involved valve/head removal.
Click to expand...

I definitaly agree with #2, valve seals on an H are like a band-aid on a bullet hole - it covers the problem, but it sure isn't the solution!
 
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