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Old 04-05-06, 01:32 PM   #1
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Stuck Stem (threaded headset)

Steel fork, alloy quill stem Im trying to remove the stem. The bolt was pretty easy to loosen and the wedge is also loose. I guess that, because of getting wet many times about five years since its been removed -- the stem is frozen onto the steerer tube (on the steel fork.) It wont move at all. Ive tried spraying some Liquid Wrench (penetrating oil) into both ends still no movement.

My next strategy is to build a vice out of a couple pieces of 2x4 to hold the fork. Then I could apply more force to the handle bars the limitation now is that I dont have a good way to hold onto the fork. Is this a bad idea?

The stem is a Cinelli (somewhat vintage) that Id really like to avoid damaging. The fork is more expendable if it comes to that. I also dont want to damage the frame.

Ideas? Suggestions?
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Old 04-05-06, 02:18 PM   #2
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Ammonia is the release agent for alum to steel corrosion. Dont do this in confined area. build up a dam around the headset with duct tape so you can pour the ammonia down between the fork and the quill. I have used this a couple of times on seatposts and it should also work on stems. Only a small amount of ammonia was needed, but enough to knock you out.
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