
Originally Posted by
SomeGuy
Pentetrating fluid (Acetone + ATF works well if you don't want to get liquid wrench/pb blaster/wd40 penetrant) will help free things up, give it at least a few minutes before going at it, the longer the better. Impact wrench can help because it applies force a little differently (hammering versus constant) but it can also very easily break things off or round off fastners before you have a chance to stop it. A big breaker bar and good quality sockets is key, as you can apply more force more evenly in the right way, flank drive sockets help from rounding things off, the right sizing is critical (no useing sae on a metric fastner). Don't ever heave on something if the socket isn't fully square and on the nut/bolt, it will just round it off, avoid extensions/universals as well as they don't apply torque as squarely if you can help it, use a wire brush to clean things up so the socket can fit on all the way. A torch helps (propane/mapp is ok, oxy-acetylene is better) to heat the area around the stuck bolt causing it to swell and break the rusty bonds. A bit of skill and knowledge helps too.
Failing all that, have extractors, damaged socket removers, cutoff wheels, grinders, etc will help to remove shit once it breaks. Then just need to replace the bolts which can be a bit of fun from time to time to find. Plan ahead, if shit looks rusted up, buy the replacements before you start and swap them anyway.
Finally, on assembly use some anti-seize, grease, fluid film, thread locker, etc (the right kinds where appropriate of course) to help things go together, stay together and come apart easily in the future.