Re: Trying to get Demello Rock Sliders mounted
Dang, I might be here too late.
I'd caution against using impact tools on bolts in the threaded frame holes. They're actually un-threaded holes in the frame with a nut welded on the backside, inside the frame. At least twice on my FJ, seized bolts in those holes resulted in the nuts breaking loose inside the frame while still seized to the bolt... and now you have a bolt that can spin but you can't un-screw! One of them I managed to grab with pliers and unscrew, the other I had to take to a shop to get cut off. My "small" impact driver didn't make a difference, and my "I wasn't asking" impact driver broke the nut off.
I'd vote definitely patience, penetrating oil, and no impact tools! Go for the extractor as last-resort, not impact. Also, if you don't already have some anti-seize coating, order or buy some now and put it on all the bolts that you put into the frame so you won't have to worry about this next time!
You could either try an extension with a bigger impact driver (to get a good seat on the head), and if that fails (or if it breaks the captive nut off the frame), a shop can melt or drill out the stuck bolt.
Last edited by 101Firedog; 05-01-2019 at 07:38 PM.