*@&*%&@&#* Dipstick Tube!!

You might try using an "extraction bit". They come in a couple of different configurations and sizes. They are particularly handy when a bolt or stud breaks off. Of course then you have to drill out the center of the bolt/stud to use the bit. So you're ahead of the game with a piece of the tube to remove.

The extraction bit will expand the tube:

Then ca inch by use it to not come out as you turn the bit harder. Try a 3/8 inch, by 16 or 24 thread per inch tap.

Thread it into the tube about an inch, then grab it with vise grips, and hammer up the vise grips, and it should come right out!

I hope this helps?

Refinish King