So I got in and cleaned out what I can. It’s impossible with the position to get it 100% clean. Looks like it happened a long time ago and this was a JB Weld fix that has now failed. Looks like it’s got a drill hole in one end of the crack. Big hole in the middle that is full of “something” that is soft under a sanding wheel. Guessing JB Weld.
Can only upload 1 picture at a time on my phone.