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![]() And see how old those fuel and oil hoses are. Ten years is the outside limit, and five is more reasonable. They get brittle and crack with age and can cause some serious second thought. The oil filters should be checked after a couple of hours running. Running the engines on the ground a few times puts a whole lot of moisture into the case and causes acid formation and corrosion. If the bearings/journals and pistons/rings have been roughed up by corrosion there might be metal in the filters. Dan I plan on replacing all the hoses and such, again, as a preventative maintanance type thing, it's a bit more cost for quite a bit of insurance in my line of thinking, plus if I get it done now, it shouldn't be an issue for the next few years. On ground running the engines. I thought that as long as you ran them on the ground long enough to get them up to operating temperature then it wasn't a problem? Something about getting the oil hot enough to evaporate the water or something. Is this just simply incorrect information? -- Louis L. Perley III N46000 - C152 N370 - PA-23-250 |
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![]() "Louis L. Perley III" wrote: On ground running the engines. I thought that as long as you ran them on the ground long enough to get them up to operating temperature then it wasn't a problem? Something about getting the oil hot enough to evaporate the water or something. Is this just simply incorrect information? Fifteen years ago, that was conventional wisdom. Now, you'll get lots of argument about it. As for getting the oil hot enough to evaporate water, on my Lycoming O-320, getting into the green arc won't do the trick. You need to get the temp at least half way up the scale and keep it there for 15 minutes or more. I can tape over my oil cooler and manage to get it there on the ground in July or August, but the rest of the year, ground operation won't get the engine hot enough. Further, running the engine at all puts acids into the oil from a combination of blowby and condensation. Unless you immediately change the oil, that acid is going to sit in your engine. Of course, if you don't run it much (as you didn't), you won't get much acid buildup, but it's still a problem. It's really best to just pickle the engine if it's going to sit. George Patterson If a man gets into a fight 3,000 miles away from home, he *had* to have been looking for it. |
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