Umbrella seals

[John Hofstetter <hofs@domain.elided>]

>BTW the IHC valve stem seaks are designed to leak a bit.  Mine does it 
>after installing new seals.  I opted for the original IH style seals and 
>not the umbrella style which will stop the leaking but the IH engineers 
>wanted that stem seal to leak a bit, you can tell by looking at the seal.
>
>Steve

The mechanic son thinks that the umbrella seals would be quick death for 
an IH engine.
John H.