I’m stumped
 

I went to drain the oil in my road race car and attached to the magnetic drain plug was a bit with an Allen head broken in it. Any thoughts? Suggestion? I can’t think of anything that would be in the motor that would use this.

The motor is a mild built ls7 and has the lingenfelter oil system upgrade but I called lingenfelter and they said they weld everything.

I can't enlarge the pics on mobile so it's hard to tell, but that looks like a nut with a nylon insert in it. Is it for sure an allen?
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I feel dumb asking because if you're working on your race car you probably know your shit.

Looks like a nylon lock nut to me as well.

It's a nylon locknut I am 100% sure it's an Allen head inside the nylon lock. That's what has me so confused since I didn't put this motor together I am stumped and short of pulling the motor apart I am stumped.

Is your engine stock or modified? Could this be from a windage tray? Maybe you just sucked it up from somewhere near the plug as you pulled it.

It has an aviaid baffle in it.

I have been speaking with the old owner and I think it's from the baffle but not 100% sure.

I'm stumped too, since I don't understand what you mean by "bit with an Allen head".
Is it an Allen head cap screw, pan head screw, flat head screw, set screw, or just a piece of an Allen wrench?
Have you taken it out to check the thread of whatever it is? Also to check the thread of the apparent nut it's stuck in?

Assuming the Allen head was a set screw, then the locknut was used to create tension to keep the set screw from loosening. That means whatever was meant to be controlled is now free to move.

I'd certainly be putting a borescope in to look around or pulling the pan.

To me it looked like a bolt that snapped off in the locknut

I was guessing that the hex portion was probably a stud and whoever installed the nut just over tightened it.

:iagree:

:cheers: