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Originally Posted by LoneWolfGal
Thanks for weighing in, Tom. I take it you disagree with Huyett that the taxonomy of bearings and bushings is somewhat ambiguous? Because Huyett and other bearing outlets have convinced me that classification is not cut and dried, I'm backing off from my position. The Solution's design could be described as a type of bearing. Or a type of bushing. From here on in I will call it a bearing for the sake of clear communication.
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I do disagree with them. In this application, It’s a hydrodynamic bearing. There is a clearance between the OD of the shaft and the ID of the bearing. The oil which is pressure fed to it, given that clearance and the feed pressure, creates pressures internal to the bearing which are well in excess of what the feed pressure is, hence the term hydrodynamic. The same principle is at play in your mains, conrod big ends, camshafts (journals, not lobes), etc.
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Good points about oil analysis. Analyzing the sample I'm sending in can detect wear metals, fuel dilution, and other contaminants that indicate potential issues and reveal whether the engine has any ongoing problems, which is my primary concern.
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Please consider it a data point and nothing more. If the engine was run very briefly, that last time it ran, you will see fuel dilution numbers which are an artifact of a cold start (so over rich combustion) and quick shutoff, for instance. Note: I am a big fan of oil testing and have been doing it for years, across our small fleet of 2 & 4 wheeled vehicles.
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