This video demonstrates how to de-rust items chemically with a sort of electrolysis. My question is if I were to submerge a brake caliper like in this video would it effe up the seals?
Its like a reverse plating , not a good idea . You don't want to clean to bare steel by removing the paint or plating ( Cad. or zinc ).I would brush /soak / brush with WD 40 . I would hate to have an corrosive liquid get in the threads / ports .
Just clean the mounting holes , push the pistons back in to get a clean wipe of oil under the O-rings / bore . That's the best you can get without rebuilding them.
Try using FOS or FOZ. It is available at marine stores in gallon jugs and is used for killing rust on metal. Apply with a brush and all the rust turns black/white'ish. Clean with a wire brush and do it again.
Vehicle: '85 300E. unaltered and original. 276,000 kms
Location: Sydney, Australia
Posts: 55
It looks to be a very difficult process to control. How does it "know" what to do?
Perhaps I'm missing something, but I'd rather do brake calipers the old-fashioned way: get the pistons out (I assume you're renewing the seals while you're at it,) scrape-scrape, wire-brush, lots of WD40, wet+dry paper and WD40, more WD40, BIG compressed-air blow clean and dry - inside and out, even though we're only talking about external rust (...right?)
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