In this week's episode of bore or scrap it.

To get dipstick tubes out, I have used a drill bit that barely fits into the hole in the interior side of the block. Turn it upside down, and slide the end that you would put in the chuck of a drill in until it hits the bottom of the dipstick tube and stops. Use a piece of wood between the pointy end of the bit so you don't booger up the drill bit hittin it with a hammer. It's not ball joint stud tight, and should ease right out.