Brake fluid DOT 3 vs DOT 5 in my '69 Mustang, what a mess
Swapped to silicone DOT 5 last summer because a buddy swore it wouldn't eat paint, and now my master cylinder is weeping at the bench bleed port after 200 miles. I thought the stuff was supposed to be gentler on old seals, but I'm going back to DOT 3 and flushing everything twice. Anyone else battled silicone fluid creeping through fittings that were fine before?
So you're saying the weep showed up at the bench bleed port specifically, not the lines or calipers? Curious if you bled the master on the car or on the bench, because that port seems to be where the trouble starts for a lot of guys. Did the fittings ever get touched with regular fluid still in them?