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Warning: a seized seatpost took me a whole weekend to get out
It was a steel frame with an aluminum post that had been in there for maybe ten years, and nothing I tried at first worked. I ended up mixing up a home brew of ammonia and automatic transmission fluid, letting it soak for two days, and finally got it with a bench vise and a cheater bar. What's your go-to method for a really stuck post that's already past the point of normal penetrating oil?
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the_beth1mo ago
Sounds like overkill for a stuck post.
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henry1011mo ago
Man, that ammonia and ATF brew is no joke. @the_beth might call it overkill, but sometimes you need the nuclear option. Everyone talks about twisting force, but they forget about heat cycles on that aluminum. A few careful rounds with a heat gun on the steel lug, not the post itself, can break the bond without wrecking the frame paint. Lets the penetrant work way deeper.
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