[SEL] making valve guides

[Listerdiesel]

On 9/2/05, John Hall <jthall at worldnet.att.net> wrote:
> I need some help/opinions. I am restoring a Titan 10-20 tractor. Those who
> are familiar with these know that the engine is pretty close to being a 2
> cylinder T&G stationary engine. I have one valve guide that is broke and the
> others have bad wear. I am going to make new ones out of cast iron. How much
> clearance do I need? The guides are 5 inches long and the valve stems are
> 1/2" dia. The only oil comes from an occasional squirt in an oil cup.
> 
> John Hall
> jthall at worldnet.att.net
> 
> 
> 

You need to work on clearances that will allow the valves to work with
little lubrication, but still allow minimal slop of the valve in the
guide. 2-3 thou radial clearance should be OK, maybe a little less if
the engine runs cool.

Phosphor Bronze is another material that you could use for the guides,
but it does require more lubrication than cast iron.

Peter
-- 
Peter A Forbes
Email: listerdiesel at gmail.com
Web: www.oldengine.org/members/diesel