I tried a "simple" dip stick replacement yesterday and it ended in breaking off my dip stick at the base I went to Lowes and bought a 3/8 inch all thread. File down one end about 1/4 to remove threads and add 2 nuts sandwiched with a lock washer on the other end. Clean filed end to remove any metal shavings before inserting, bare down on rod witha socket wrench get the rod to thread into the broken off shaft and continue till you see the shaft strat to spin and it will pop out. Easy hope this helps anyone.
Had to do a similer thing on a ford F150 V6, dipstick tube broke off at the block, and it like 7 hours to take the oil pan off (have to pull the motor Lol), I found a tap that would just fit into the dipstick tub, greased the threads of the tap to catch any cuttings, and tapped the inside of the old tube, the used a sleave about an inch long with a larger Outside dia than the tube, then take a bolt and nut of the same size you tapped the oil tube to, about 2 inches long, screw the nut to the top of the bolt head, put the 1 inch sleave over the bolt, then screw the bolt in about 1/2 inch or so into the oil tube, the tighten the nut down on the sleave, while holding the bolt head, and it pulls the remains out of the block.