If the dowel is hollow all its length, find a solid dowel that will just slip into the stuck hollow dowel, fill the cavity with oil then tap the solid dowel into the hollow dowel. Hydraulic pressure will force the hollow dowel out. (wear safety goggles). If the stuck dowel is solid, drill a smaller diameter hole from the other side and use a suitably sized drift pin to drive the dowel out from above.
Snap and Mac make inside/outside pliers. A little heat and a pair of those pliers might just do the trick.
drive a self tapping screw into it, and then use a slide hammer to pull the screw out, hopefully with the dowel pin on it.
then find a tap of the appropriate size, and be prepared to destroy it . . . . sometimes, an easy out (or similar) will rotate teh pin enough that it begins to walk out on it's own . . ..
Is this a car engine crankcase? Is the oil galley plugged above the dowel? Sometimes oil galleys are drilled then plugged at one end.
Your best bet is a tap or an Easy-Out. The tap will create swarf that will need to be controlled, The easy-out may jam the pin tighter against the bore.
Easy out to grab and turn the dowel, while heating the aluminum case. The case will expand faster and greater than the steel dowel therefor freeing the dowel.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
the only other thing I could add to the list is welding... put a piece of rod, screw, etc down one side and tack it with a wire feed. the heat will help too another desperate possibility is to take a tiny cutoff wheel on a Dremel & cut down one side enough to cave it in & get a bite. it prolly means putting a groove in part of the saddle, but I'm sure there is enough metal so it won't matter
An expensive but effective way to remove a hardened dowel if other methods won't work is to take the case to a high end tool and die shop that has an EDM machine. The EDM machine uses a carbide electrode in a fluid bath to eat away at the dowel. The expense would have to balanced against the cost of replacing the case.
If snap ring pliers won't fit in the hole it's probably to small for the other pliers. A tap or easy our and some heat to the case sounds like the best plan. A screw probably won't bite, to soft. The dowels are very hard.
Just turn it upside down and let it fall out...duh OK. my real vote is to follow CONCOURS' endorsement of Sieg's idea.
That crankcase was prolly wore out anyway...the good news is you prolly don't need to fuck with that dowel any further
very important. the case is bored on size with it's mating half... any other half is not in alignment... each case is unique by a few thou
