Probably a Silly Brake Fitting Question

[RRoller123]

This may be obvious, but I thought I would ask the assembled masses:

I assume that in reinstalling new brake fittings to the Master Cylinder, and to the junctions at the line's opposing end, that these connections are made absolutely dry? No micro film of brake fluid, no anti-seize, no Teflon tape, etc. Nothing. Just dry metal on dry metal? Correct?

It would explain why they commonly freeze up and are so hard to remove.

BTW, here is pretty good visual of the ISO Metric Bubble Flare, with a couple of critical dimensions illustrated:

http://www.fedhillusa.com/webnuts/common%20flares6.pdf


Pete

[kilrwail]

Normally they're completely dry. A bit of anti-seize probably wouldn't hurt. There's lots of thread, so you don't need to use max torque.

[Nanonevol]

I did some brake work recently and was surprised how much pressure the fluid comes under. I guess I didn't make a flare perfectly and had fluid coming out - past all those threads.

[So Cal Mark]

the threads don't seal, it's the flare that has to seat to create a seal

[RRoller123]

So I will use a little anti-seize, but only back away from the business end of the thread. Thanks all!

Pete