Re: Silicon brake fluid

Posted by Ross On 2018/2/12 23:27:19

Preposterous panicking and finger pointing. Silicone fluid is astonishingly inert and will by no means cause rapid swelling of rubber parts.

If the unit is leaking where you say it needs to have a new copper washer inserted under the head of the retaining bolt and under the distribution block. There is no rubber there. Have you tried tightening the bolt?

It is also possible that the entire fitting at the end of the casting may have gotten rotated out a bit when the unit was installed. I believe White Post uses an o-ring there instead of the original style square cut ring. In any event, just make sure that large hex fitting is tight to the casting.

The reason silicone fluid does not see use in modern vehicles is lack of lubricity which wreaks havoc with rapidly cycling ABS components. Packard brakes don't generally cycle that rapidly unless the driver has the DTs.

The brake light switches also don't seem to like it much. The plus side of silicone is I and many customers have gotten very long service life out of their brake components --in excess of 20 years--with minimal maintenance.