This is my TJ making a horrible noise. I made this video the morning before replacing the engine with one from a wrecked ZJ (Grand Cherokee). Haven't taken it apart yet to determine what the cause was. This is a 4.0L inline 6 with 244k miles.
***Update***
Turns out the #2 piston broke just under the top ring on the skirt side, dropping chunks into the oil pan.
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