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Was it a diagonal or conical wedge in there? If it was conical then trying to drive it out with a drift might be tough as if might just push the walls of the stem out into the steerer, wedging it in there more firmly. A diagonal cut stem might be easier, but also not easy to get a good strike on.
If the wedge came out through the crown it implies that the remnants of the stem will too. I'd be tempted to put a long threaded rod up through the steerer and stem with a big strong washer on each end and a nut. Then put it under some tension to try to drive the stem further into the steerer. Soak it in oil and periodically give the top end a whack with a hammer and another quarter-turn. If if succeeds in "breaking the seal" that the corrosion has formed then you can just keep pulling it through (if you have a washer for the top end that's just smaller than the stem diameter). Once it's almost all the way out, just drive it out by whacking the top end of the threaded rod.
If that doesn't work, then you can always caustic soda it.
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ffm
Hi, I have a Pinarello Columbus fork that has the remnants of a quill stem stuck / seized inside. The forks belong to a Pinarello frame that is in good condition. I will be getting the forks re-chromed.
The remainder extends the length of the pencil in the photos. There is no bolt at the end just the thick walled tube?
I have two questions. Is there a company that will remove the remainder of the quill stem and re-chrome?
Or do I need to go down the drill out as much as I can and caustic soda route? Has anyone done this? How do you dispose of the caustic soda after?
Thanks for any help.
Jazzy