New answers tagged rust-removal
Use a mini-hack and get rid of that bolt, along with those washers. The parts on that tank are all wrong. The bolts should be brass and the washers should be rubber, not hard plastic.
Looks like the threads on the bolt are crushed/damaged, so you're only choice might be to drill it out or cut it off. Put on a pair of good work gloves. Remove the blade from a hack saw. Then work the blade between the nut, and the plastic washer. It will likely be slow, hard work, but eventually you should be able to cut the bolt. Alternatively, you ...
The bolt looks like a lost cause. I assume you'll be replacing it with a new one? First try this: Get a good wrench on the nut (closed end preferably). A vice grips set very snugly should work too. Find a way to hold it in place so it doesn't spin with the bolt (the floor or a vice or some helping hands) so you have two hands free. Get a good ...
The most expedient and practical solution is to drill out the bolt. Probably access is better from the top through the tank, but it can be done from either side. The goal of "drilling out" is to weaken the shaft of the bolt enough so that either the friction on the nut is reduced to the point where it turns, or the shaft breaks and separates into two ...
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