I know steel has to be better. For one thing, aluminum screws can get damaged from over tightening and you want a ground screw more than just snug. Also, aluminum corrosion could be a problem unless you use dielectric grease on the threads.
CAn I do it? Always have used steel assuming aluminum would not conduct electricity well enough.
will the electrical ground accelerate corrosion on aluminum worse than steel screws?
Will an anodized finish on the screw prevent a good ground to the frame?
The ground I'm using is the rear bolt hole in the frame where the left side sub frame attaches. The subframe has been removed and I'd like to use an aluminum bolt there in place of the big steel OEM one. It's a 6mm thread diameter x 1.25 pitch bolt. Prolly about $5 for one so thought I'd ask first and maybe buy later.
* Last updated by: Rook on 12/13/2014 @ 5:45 PM *