I found tons of metal shavings in my coolant tank and in my radiator. I put a little of the fluid in a cup and the bottom is lined with metal shavings. (I Hope there’s no metal in the oil) Anyone knows where this could come from? The car has been hesitating/possibly misfiring a lot lately with no CEL. (58,500 miles). Told dealer about the hesitation months ago during service and was told it’s nothing they can do unless there’s a CEL. I discovered the shavings yesterday while doing a Combustion leak test which tested positive for a leak. I don’t see any leaks on the outside.