stainless bolts frozen in aluminum backing plate

[spareparts]

Kracker is right on, use the screw head to center the drill, drill out the heads till they pop off, go slow, use lots of drilling fluid. Once you get them out, use vise grips to wring off whats left in the plate, drill the plate over size and use ss nylocks when you put them back together

[Illogikal99]

I was attempting to be a cheap-skate and save the hardware since its only the aluminum thats corroded but its more trouble than its worth. tomorrow I'll just drill out the heads, hopefully won't get rained on. thanks for the heads up on that anti-seize compound, I think the compound with the nylon barrier washers might do the trick. also gonna drill out the plate to a larger diameter hole. all good ideas, all getting used.
should have seen me trying to remove the old bow rail, every screw was seized! had to grind off the heads of 3/4 of the screws... not too tough just really annoying. I'll post pics of the new rail and new SS rod holders when done. thanks again

[Kracker Jack]

I actually used lock-tite when I built my motorcycle 2 winters ago. I converted evrything to stainless steel and put the bolts in aluminum!!!!!!! bad mistake!!!!! If you were to back one of those bolts out you are gonna pull the thread with it. I even warned the guy who bought the bike from me what I had done, I thought I owed it to him. This has nothing to do with this thread, I just decided to share my experience with aluminum and stainless

[Destroyer]

Originally Posted by Kracker Jack

I actually used lock-tite when I built my motorcycle 2 winters ago. I converted evrything to stainless steel and put the bolts in aluminum!!!!!!! bad mistake!!!!! If you were to back one of those bolts out you are gonna pull the thread with it. I even warned the guy who bought the bike from me what I had done, I thought I owed it to him. This has nothing to do with this thread, I just decided to share my experience with aluminum and stainless

I have a 1973 BSA 441 Victor. Every single nut, bolt or screw on my bike has never-seez on it, and I never try to unscrew any of them with a philips head screwdriver. I use a hand impact tool all the time... It still has all the original screws and none of the heads are rounded out. It's the perfect combination for Stainless Steel and Aluminum.

[RidgeRunner]

Outboard motors are eat up with stainless fasteners into aluminum. I recall a cursing session after pulling the threads out of the old style Merc power trim cylinders. Lately I fought the bolts on a later model trim motor. I use never sieze or a dollop of the Merc grease, 202? At least you can wipe the grease off your hands, never sieze is damn near as messy as 5200. LOL.

[Destroyer]

Originally Posted by RidgeRunner

Outboard motors are eat up with stainless fasteners into aluminum. I recall a cursing session after pulling the threads out of the old style Merc power trim cylinders. Lately I fought the bolts on a later model trim motor. I use never sieze or a dollop of the Merc grease, 202? At least you can wipe the grease off your hands, never sieze is damn near as messy as 5200. LOL.

Very true, but at least Never-seez will wash off easily with soap and water, so it's not as bad as 5200..