Re: Of DOT3, alcohol antifreeze, vinegar and other alchemy

Posted by Owen_Dyneto On 2009/12/31 15:23:05

Thanks Kev, I wasn't aware of DOT5.1.

I've known of several instances when 3.0 "boiled" in the wheel cylinders from heat caused by extremely heavy braking which of course results in loss of hydraulic pressure and causes temporary loss of brakes. After cooling down the braking action returns to normal. Some folks have mistakenly attributed this to master cylinder failure but of course it is not.

DOT4 is the currently recommended brake fluid for BMW.