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A stuck seatpost in Portland ate my whole Saturday and the fix was embarrassingly simple
Spent 5 hours with penetrant, a strap wrench, and a heat gun on a seized aluminum post before a guy at the shop down the street told me to flip the frame upside down and pour ammonia down the seat tube, and it broke free in 20 minutes, so has anyone else had ammonia work when everything else failed or did I just get lucky?
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harper_singh1823d ago
The part nobody talks about is what the ammonia is actually doing, it eats the corrosion layer between the aluminum and steel. Your post was stuck because the two metals basically welded themselves together through galvanic corrosion, and all that penetrant and heat was never getting to the spot that mattered. Ammonia dissolves that white oxidation junk, so the bond breaks and the post twists free. Heat and oil only help when the post is stuck from friction or old grease, not from actual metal bonding. So no, you didn't get lucky, you got the right fix for the right kind of stuck.
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