Re: Dot 5 brake fluid and leaking wheel cylinder’s
simply science dot 1 thru 4 are basically organic [ vegetable oil compounds] where as dot 5 is synthetic [not necessarily silicone ] the dot rating relates to boiling piont and water hydrcopity [the ability to absorb water ] and the same goes for brake rubbers they are not pure rubber but rubber compounds some later one actually contain no rubber at all so you need to check compatability or at least ask whoever supplies these parts what is the best fluid to use miss match is a ticking time bomb
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