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Just like any other bearing in any automotive engine, it needs a constant source of oil in order to keep spinning. It does this by utilizing oil galleries which are drilled throughout the block. These are fed oil from the oil pump, which draws oil (in most cases) from the oil pan reservoir. Since I know Small Block Chevrolet (GenI) engines, I'll use them as ...


3

Journal bearings have a small hole to constantly supply oil for lubrication. They do not rely on oil coming from the surrounding vicinity. That said, it is possible to run the bearing dry if there is insufficient oil pressure or the tolerance between the camshaft and bearing is too little, but the former scenario is an indication of bigger problems while ...


0

So, this is a slightly delayed answer, but the problem turned out to be the bearing. Immediately after having it replaced, the noise was SUBSTANTIALLY reduced, and I could actually hear the other rear bearing also starting to fail (albeit very faintly). With the low noise, I'm able to hear some slight tire noise as well as described above, but pitch and ...



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