Posted by Janicholson on August 09, 2008 at 05:55:01 from (66.173.50.88):
In Reply to: Smoking Tractor posted by Wayne Mo on August 08, 2008 at 21:15:00:
If it smokes like a wet camp fire when slowing down in fifth gear, it is likely valve stem wear, and no valve seals. (It probably never had any, they were not stock) I would do the compression check, and if it is above 90, and within 10% on all cylinders, I would put valve seals on it. Remove the valve cover. Remove the rocker assembly (leave the pushrods in place down their holes) Place a 3/4" deep socket over each valve retainer and tap it modestly with a hammer to loosen the keepers (do not hit too hard, or the keepers will come out. This just unseats them to make removal easy)
Use a piece of cotton rope, snaked into the cylinder through the spark plug hole, to hold up the valves in each cylinder, as the springs are taken off. About 2-1/2 feet of 1/4" rope will do. When all but 6" of rope is in the cylinder, ----HAND---- turn the engine till the rope is tight into the combustion chamber Use a lever type valve spring compressor to depress the valve springs and remove the keepers. Put on the umbrella (or Perfect circle type BEST) seals on the stem, then put the spring back on. Re assemble the valve train, (make sure the rope is out), and set the valves (to cold spec) .020" I think. The seals allow proper oil to get to the stem, and not excess oil. This prevents high vacuum conditions from pulling oil into the cylinders past the guides. Good luck, JimN
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