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dirty oil
Nathan Young wrote:
On Mon, 29 Jan 2007 13:49:26 -0600, "Dan Luke" wrote: wrote: Definitely have an A&P borescope that engine. Broken ring maybe. Talked to my mechanic this morning. He said not to worry; the dirty oil is from the oil cooler and its plumbing, which don't get drained when the oil is changed. He said I would have noticed this before if I had ever checked it two hours after a change. Since I check the oil before every flight, it seems I would have noticed the oil's turning black this soon before. Should I pay to have the cylinders 'scoped? Your mechanic's comment sounds unrealistic. I have a hard time believing the 1/2 quart in the cooler & lines could add enough coloration to the 7-8 quarts of new/clean oil. Further, I don't notice my oil turning black until many hours after the change. (Lyc O-360 using Aeroshell 15W50), and I never flush the cooler during a change. Is your oil a dark black? Or just a tinge of coloration? I have a Lyc O-360 on my Cessna and there is a oil cooler. I have never had dirty oil after only a couple of hours of operation. I would keep looking. -- Regards, Ross C-172F 180HP KSWI |
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