Quote:
Originally posted by wbain5280
. .yosshimura hs a pointHis Pontiac is running fine and the MB needs brake fluid changes. My Volvos need brake fluid changes too. The reason the Pontiac doesn't require brake fluid changes is because the master cylinder has a bellows built in to the seal between the master cylinder and the cover. As the brakes wear and the fluid level decreases, the bellows is drawn down.
European cars have a vented cover, the older American cars don't. Perhaps the newer American cars do. Those cast iron master cylinders sure were heavy.
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But not much of a point.
Brake hoses are made of rubber too and they allow air/moisture to migrate across cell boundaries.
Also, most motorcycles have a similar brake reservoir arrangement to the one you describe - and I can only speak about Suzuki here - but they also recommend 2 yearly fluid changes.
As I posted originally, it is only a recommendation but - there is a horrible cost in finding out you made a poor judgement call in saving $30 or so!!