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  • Situation: Drive side of a square taper bottom bracket will not budge. I've tried a bit of GT85 round the threads and used a massive breaker bar + old seat post extension to get loads of leverage, still nada.

    Questions:
    a) Could pouring a more specific "penetrating oil" down the seat tube towards the BB threads help?
    b) Whats the best penetrating oil? Plus Gas seems to come reccomended
    c) Any other tips? Heat? How much? I dont want to muck up the paint if possible

    Thanks!

  • Cartridge or cup n' cone BB? If the latter, you could do something like hacksaw (stopping short of the BB threads) a notch and then crush it with a vice or something. Sounds fun.

  • Take it to a garage and borrow their impact driver?

    Edit: Providing your bb tool can be fit with a socket or some kind of drill fitting

  • Pretty sure you can knock out the cartridge by hammering the axle towards the NDS side.

    +mdcc_tester can confirm?

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