Metal chunks found in engine oil, and as were not metal powder swirl, shavings, or specs, possibly from bottom engine crankshaft. At the crank pulley, with the belt off, I could feel nudge by hand from the middle, for an engine component with max specified endplay 0.012 inches, or fraction of a millimeter. An existing manufacturer recall, and not a safety recall, for this 2021 Jeep Wrangler 2.0L Turbo is inspection for loose bolts for water pump inlet. This vehicle will not be available for inspection requests, because it is still not, and waiting to be, diagnosed as the dealer could not necessarily hear an engine issue. I have heard it knock, like a rumbling V8 and turbo whined, and recently I decided to strain the old and knocking oil that I kept and discovered metal. There was something wrong all along. Top engine, with good gas mileage, has been fine. The safety concern to this vehicle is metal in oil to possibly enter top engine and create sudden or instant engine seizure while in operation. The safety of driver or others could be at risk. The safety concern to this vehicle is also the detioration of engine components since they appear under the sole discretion of this motorized vehicle. This means, no other factor known to the driver of this vehicle by which rate of engine detioration has occurred. An indicating observation to be made into this vehicle’s safety is the endplay of the crankshaft. This vehicle is nearly 97,000 miles odometer. The endplay seems very excessive, causing me to speculate on original factory fitment and installation during assembly. What determinations into a non-safety recall of loose water pump bolts might emerge as consideration into engine interior deterioration, as rate of this deterioration appear under sole vehicle discretion and remain unknown to the driver. Insufficient cooling is known to cause buildup in any engine, this vehicle has burped coolant air. No warning lights in the dash was seen.