Gaskets

[David Harmon]

George....I had a hairline crack in the valve cover that I found only
when I used alcohol to clean the oil out of the cover. Then, I put
alcohol in the cover and found where the crack was.
Had to get a new one.
Lap the valve cover flat and you will never suck in a gasket.

Regards

Dave Harmon
NSRCA 586
K6XYZ at comcast.net
Torrance, Ca.

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of Kenneth Velez
Sent: Thursday, September 18, 2003 11:59 PM
To: discussion at nsrca.org
Subject: Re: Gaskets

  George I had this happened to me twice. The first time, lost a screw
from
the valve cover and it opened up. The second time was a bad valve cover
gasket.. Both times had a high idle. Some people will go as far as
lapping
the valve cover and or the air box halves with 600 sand paper over a
straight piece of glass. If it is turning that high with the throttle
closed
is a big air leak. the problem has to be past the carb., air box top end
I
will say. Check the push rod housing o-rings, cam shaft plate o-ring
even
the front wrist pin removal screw and plug in front of the carb.  Hope
you
find the answer to the problem.

Ken
----- Original Message -----
From: "george kennie" <geobet at gis.net>
To: <discussion at nsrca.org>
Sent: Thursday, September 18, 2003 8:49 PM
Subject: Re: Gaskets


> Guys,
> Thanks for trying.
> The engine is a 91 AC and has been sitting idle for about 2 years. 2
years
ago
> it was running O.K., but when I tried to run it in a  new airplane it
did
not
> run very well. It starts O.K. and the top end seems good, but when I
try
to come
> back to idle it only comes down to about 6k rpm and this is with the
barrel
> CLOSED and after running for about at least 30 seconds it may slow to
2200
with
> sporadic intervals where it almosts quits and then sometimes will
speed
back up
> to 6k again and once again, all with the barrel closed.
> The regulator gasket is the diaphragm and I replaced that. I blew out
all
> passages in the regulator body and they are free and clear. I checked
the
> silicone plunger and it checks O.K.  The plunger shaft was checked for
freedom
> of movement, again O.K. The shut-off action of the plunger was checked
and
> operated as designed. The regulator screw is adjusted flush. The
air-bleed
screw
> is adjusted 1&1/2 turns out(I've tried it from closed to 5 turns out).
> The needle valve body has been blown clear and a small wire run thru
the
> passages to insure that no foreign material is clogging anything.New
O-rings
> installed on the needle valve body.New O-ring at the base of the
airbox.
The
> backplate, carburetor body, and airbox gaskets replaced and all screws
> adequately retightened. The valves adjusted and the cover base dressed
flat and
> reassembled with a new gasket. After all this the engine runs like it
has
an air
> leak somewhere.
> When I adjust the throttle from the 6k rpm point to return to full
throttle it
> sounds like it's starving for 2 or 3 seconds before it starts to
recover
to full
> speed.
> Tank pressure is strong and fuel flow to the carb is good.
> I'm at my wits end and I'm not that keen on sending it to the repair
facility as
> I sent my 63 to them a couple of months ago and it came back the same
way
it
> went in.Now I'm stuck with two engines that are unusable.
> Any further ideas will be gratefully received.
> Georgie
>
>
> Tony Stillman wrote:
>
> > George:
> > The only real problem was the regulator gasket.  High nitro, over
time,
will
> > cause the tiny fuel passage hole to close up.  The new regulator
gasket
> > material is black, and does not have this problem.  The "Leak Free"
brand
> > was also a different material, and will not clog.
> >
> > If you have to old brown "paper" regulator gasket, just replace it
with
the
> > regulator gasket that is available seperately for about $1.50.
> >
> > Tony Stillman
> > Radio South
> > 3702 N. Pace Blvd.
> > Pensacola, FL 32505
> > 1-800-962-7802
> > www.radiosouthrc.com
> > ----- Original Message -----
> > From: "george kennie" <geobet at gis.net>
> > To: <discussion at nsrca.org>
> > Sent: Thursday, September 18, 2003 12:39 PM
> > Subject: Gaskets
> >
> > > Hey Guys,
> > > Need a little help here!
> > > Some of you YS gurus please respond.
> > > I remember seeing Leak Free Gaskets advertised some time back.
What I
> > > would like to know is, why was there a market for this product?
Does
the
> > > motor start to malfunction in some way that indicates to you that
you
> > > need new gaskets or that there may be a gasket leak somewhere and
what
> > > are the symptoms. Does the motor cease to run or does it become
errattic
> > > in some way? Please be specific as I feel that I may be
experiencing
> > > gasket woes.
> > > Thanks for any help you can send my way.
> > > Georgie



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