There is a knocking in the engine that gets louder when the engine is revved, even while stationary. I did find metal fragments in the oil pan.
Hi. From you initial description of the noise and what you found in the oil pan it is safe to say that you have a serious internal engine problem. It sounds like you have a rod or crankshaft bearing that has failed and it causing the metal and the noise. This means that the engine will need to be replaced or rebuilt.
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