YS-91 AC problem

[Jim Ivey]

Ken
 When you pull the valves chuck the end of the valve in your dremel and use WD 40 and scotch brite to remove the carbon. The scotch brite won't hurt the valve stem and turn the stem medium speed and keep it wet with WD-40. Then when you are ready to reinstall, seat the valve by using the dremel again and use rubbing compound and pull the valve into the seat while using medium speed.After a minute or two you will get the feel of what is happening with the seat. The other thing I use the dremel for is to check the valve and see if it is bent. When it is turning in the dremel the edge of the valve should be a sharp image. If it is a blur ,the valve is bent.
> 
Jim Ivey
> From: "Ken Thompson" <mrandmrst at comcast.net>
> Date: 2005/06/02 Thu PM 10:04:46 EDT
> To: <discussion at nsrca.org>
> Subject: Re: YS-91 AC problem
> 
> I'm going to try to find a solvent to soften the carbon, at the local auto 
> supply, and use a brass wire wheel to remove the balance, still in theory.
> 
> Ken
> ----- Original Message ----- 
> From: "Bob Kane" <getterflash at yahoo.com>
> To: <discussion at nsrca.org>
> Sent: Thursday, June 02, 2005 9:52 PM
> Subject: Re: YS-91 AC problem
> 
> 
> > The carbon is tuff, I scrape the stems and valve edge
> > clean using some tool softer that the valve. The first
> > time I saw this I thought the edges of the valve had
> > broken off, but it was the rough edge of the carbon
> > buildup.
> >
> > --- Ken Thompson <mrandmrst at comcast.net> wrote:
> >
> >> Paul,
> >>
> >> I'm going to pull the head and drop the valves out
> >> to clean them.  Is there an easier way?
> >>
> >> Ken
> >>   ----- Original Message ----- 
> >>   From: Paul Horan
> >>   To: discussion at nsrca.org
> >>   Sent: Thursday, June 02, 2005 9:29 PM
> >>   Subject: Re: YS-91 AC problem
> >>
> >>
> >>   Ken,
> >>       What did he tell you to do the cure the carbon
> >> problem.
> >>   Thanks,
> >>   Paul
> >>     ----- Original Message ----- 
> >>     From: Ken Thompson
> >>     To: discussion at nsrca.org
> >>     Sent: Thursday, June 02, 2005 7:22 PM
> >>     Subject: YS-91 AC problem
> >>
> >>
> >>     Thank you to all who gave me places to look for
> >> my problem.
> >>     Somebody gave me the thought that maybe it was
> >> carbon deposits on a valve, I'm sorry I don't
> >> remember who.  I dismissed this theory because the
> >> valves seemed to be operating properly.
> >>     Early this morning Mike Darr stopped by to check
> >> out my damaged Excelleron and took a look at my
> >> motor for me.  He manually worked the valves and all
> >> of a sudden the compression came back.  It looks
> >> like there was carbon on the valves after all.  He
> >> told me what to do and I should have it fixed as
> >> soon as I get back from Norfolk, a little trip this
> >> weekend to go out for the day on the USS Theodore
> >> Roosevelt.
> >>     Thank you all again and thanks to Mike for
> >> showing me what to do.
> >>
> >>     Ken Thompson
> >
> >
> > Bob Kane
> > getterflash at yahoo.com
> >
> >
> >
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