I missed the start of this thread, but in addition to the other factors mentioned already (differing strength, galvanic in-compatibility), stainless suffers an odd kind of corrosion known as "crevice corrosion" when used in airless, confined environments (technically, those which become depleted of oxygen). I would not think it a good choice for critical fasteners in a water-cooled engine. Stainless is a useful material but has some quirks and must be applied carefully especially in critical applications. ("Critical" for present purposes = $$$ to fix... ) regards, Ed |
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