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Not exactly sure what it was. But it was a piece of metal fell out when i removed the dipstick tube. I guess someone had dropped it in there at somepoint and it got wedged in there an rubbed with the vidrations.
I wonder if there is such a thing as a flexible auto dipstick tube? I'm having a hard time squeezing a DP in there with the dipstick. I tempted to just leave the short stub down there and cut the dipstick down to size. LOL