This is a problem I have run into with old Cadillacs. The way I handled this was, first, if necessary, square off the broken end. Then use the appropriate sized tap and cut threads into the broken off end of the dip stick tube. Once threaded I would then screw a bolt into it and use a slip hammer or a puller, depending on how much room I had to ease the broken end out of the engine block. Sometimes heating it helped loosen it. I always use a National Fine tap.
Last edited by transmaster; 03-14-2011 at 08:38 PM.