YSK you can teach yourself how to repair car parts, even engines and transmissions, without going to school or taking apart your own car - by buying old manuals off of auction sites.
from /r/YouShouldKnow
YSK你可以教自己如何修理汽车零件，甚至是发动机和变速箱，而不用去学校或拆开自己的车--通过在拍卖网站上购买旧手册。