Posted by Janicholson on April 26, 2013 at 20:22:14 from (74.60.94.18):
In Reply to: C-263 valves posted by Fritz Maurer on April 26, 2013 at 18:47:45:
Ash in oil is composed of non-combustible additives and metals that are present in oils (even the newer diesel oils do not meet the IH spec of .5% ash. The non combustible materials fuse to the valve stem. and create a buildup that can and does migrate into the tip of the guide just as the valve closes, thus allowing the valve to get hung up and a tiny bit open. This prevents cooling, and allows the valve to get so hot that it changes shape and fails as exhaust screams past under combustion pressure. It is like cokeing, but is more like ceramic, and less like a briquette, Jim
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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