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Fordson Tractors Discussion Forum

Re: sticky valve!

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Cameron Smith

03-14-2010 15:18:46

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Turn the engine over slowly until the cylinder with the stuck valve is at or near top center(watch the valve action of the other cylinders), and back off the rocker adjuster on the stuck valve to get the rocker slid to the side. Soak it with the best penetrating oil you can find and tap the end of the valve stem lightly with a hammer. You want the valve to "bounce" a little with the spring pressure. Soak and tap and it should eventually loosen up. The reason for the piston being up is in case the stem lock lets go, the valve doesn't go down into the cylinder(unlikely but possible).

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Mike Farmer

03-15-2010 02:15:46

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 Re: sticky valve! in reply to Cameron Smith, 03-14-2010 15:18:46  
Thats about the only way without stripping head off. Only thing I would add is to get 'some'heat on it if possible. To avoid any burn damage I suggest wrap some rags tightly around valve stem/spring and pour boiling water over it. Leave it for a few minutes to 'heat soak' then get to work with the hammer. I also suggest you will need to have the piston at least 3/4 inch down the bore to avoid banging the valve into it.When you hit it, if it stays down just walk away and leave it. They will often come back up on their own. Tuff about exhaust pipe. MTF

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