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
<<attachment: winmail.dat>>
