<VV> Fwd: Fw: bronze valve guides

[Dave Thompson]

<SNIP>
Intake valve stem seals are pretty much required 
when the valve stems are vertical, but with horizontal stems, like on 
the Corvair and others, the seals are generally considered optional by 
most of the folks that I know.

Bill Strickland
<SNIP>

William Wynne of FlyCorvair.com fame told me NOT to install intake valve
seals when I was looking into building a flight Corvair engine. I wish now
that I had asked him why.

Dave Thompson

-----Original Message-----
From: Chris & Bill Strickland [mailto:lechevrier at earthlink.net] 
Sent: Tuesday, December 08, 2009 5:59 PM
To: virtualvairs at corvair.org
Subject: Re: <VV> Fwd: Fw: bronze valve guides


>then when you get the guide out of the head, use a ball guage to measure
that hole.
>

don't think you can get an accurate measurement with the guide installed 
-- isn't the thing tapered on the outside end, so that you can get it 
started in the hole?  if it's .500, what is holding it in?  I'm not 
talking any out just to measure them!

Nobody has mentioned "knurling" as a third alternative -- generally the 
technique is used when the guides are not "replaceable", but it can be 
done on a Corvair.