Brake Fluid Leak

[SilvernBlack69]

I noticed paint bubbling up on the insider fender below the master cylinder and proportioning valve. The two lines are long and make many turns which are connected to proportioner.
One of the lines is leaking it appears on the fitting which has two nuts or couplers ? I checked and they are tight. If I take them off and re-tape them with teflon tape is that the proper way to stop the leak ?
Should I remove them totally ?
Also and most important will I have to bleed the brakes once I remove and re-tighten ?

Thanks

[MarkM66]

They seal by a flare, not by tape. You will need to make or purchase a new line.

Yeah, you'll have to bleed them. No big deal there.

[RBuhr69]

A friend of mine taught me a trick that sometimes you can loosen and add a few drops of lock-tite and retighten. It worked for me :)

[Apogee]

Hmm...never heard of the threadlocker trick, although I makes a certain amount of intuitive sense given what it does with threads it could also do between sealing surfaces. I'd be concerned about the chemical compatibility between brake fluid and thread locker...

That said, the best way that I've found to get leaky/weepy/seepy inverted flare connection to seal is to repeatedly loosen and tighten the fitting, taking care to never over-torque the fitting. Stainless lines are notorious for not wanting to seal, especially when paired with steel hose fittings.

Tobin
KORE3