the old "rope trick", is great, and it does work in an emergency...there is one more trick I use and that isto "take the valve"...take off the rocker box. and hit the offender several times with a big hard rubber hammer..first using penetrating oil all around the offending valve....MOST of the time it will come loose.....as a point of intrest...Has anyone "tore down" a engine that had mistery oil used a lot in it?....pray tell, what did yo find?....don't get me wrong, Mystery oil is good, but I heard it is nothing more than kerosine, with a little "pew" mixed in...am I wrong?. jolly in aurora..
David Abrams wrote: > The Rope Trick? > > OK, I start up at ORE after a fly-in and I have a 3 cylinder 'Coupe. I am > not going home. Here is what you do: > > Stop the engine as soon as you notice the problem. No point in bending any > pushrods. > > Pull the upper spark plug out of the cylinder with the stuck (it is always > the ) exhaust valve. Move the prop until the piston is at bottom dead > center and thread the rope (use 1/4 inch or 3/8 in cotton) into the cylinder > through the spark plug hole. Slowly move the prop to compress the rope with > the piston. This will push the valve closed. Do not push past the point > necessary to close the valve. Lower the piston and remove the rope and put > everything back together again. > > Usually this will unstick the valve enough to get you home at which point my > mechanic drops the valve into the cylinder (after tying a piece of dental > floss to the end) and reams the valve guide before pulling the valve back > into place. > > The problem is that the valve sticks open because at shutdown the valve is > in the open position and there is insufficient clearance between the valve > and the guide due to lead deposits. As the engine cools down the valve > sticks in place. > > When you start the engine, the valve is not returned to the closed position > by spring pressure. By closing the valve with the rope, you break the > deposits a bit but mostly when the valve is opened by the rocker it is > moving and the spring pressure can close it again. This trick has allowed > me to get home from far away twice when I had a stuck valve. In both cases > I had the guide reamed by my mechanic before I flew again. > > David Abrams > [EMAIL PROTECTED] > http://ercoupe.com > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Sent: Thursday, December 23, 1999 12:13 AM > > To: [EMAIL PROTECTED] > > Subject: Re: AvBlend - Technical Question/Posting > > > > > > Maybe I had better start using something in my oil since I > > don't know the > > "ROPE TRICK". Or maybe I should learn the "ROPE TRICK". > > Anyone care to > > enlighten me? Wayne N3544H Shelton, WA > > > > > > _____________________________________________________________ > > Get your favorite topic delivered daily. > > http://www.topica.com/t/11 > > > > _____________________________________________________________ > Get your favorite topic delivered daily. > http://www.topica.com/t/11 _____________________________________________________________ Get your favorite topic delivered daily. http://www.topica.com/t/11
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