Teflon Tape on MC Fittings?

[MustangPaul]

Hi all--

Got the MC swapped out for a two chamber. Had to get some reducers--Thanks O'Reilly Autoparts!--and now I have a tiny seep on from one of the reducers. Should I use teflon tape on the threads? I seem to remember that fuel lines and teflon tape don't mix, but what about brake lines?

Thanks!

--Paul

 

[GaPonyFarm]

Those are flared fittings, you shouldn't need teflon tape. If you're using reducers, they should be the type for a flared fitting... and easy mistake. If you are using the correct pieces and are having a leak, either tighten the fitting some more, or reflare the line. Tape will not hold and will eventually allow all the fluid to leak out.... then you know what happens. Not to mention the fire hazard from brake fluid hitting a hot exhaust.

 

[HistoricMustang]

Ditto.

HistoricMustang
www.historicmustang.com

 

[rbohm]

agreed.

 

[MustangPaul]

Good to know. I have the reducers for flared ends, so I'll tighten some more. The flares held on the the fruit jar MC, so I assumed they'd be ok on the new one. (I reused the existing steel lines from the old one.)

When you replace the MC, should you reflare?

--Paul

PS I hadn't thought abhout the fire hazard. YOW!

 

[66HertzClone]

I had this problem when I put my SSBC kit on. I tried to use a reducer but found that it leaked. The reducer I used was made from steel not brass and when I looked closely at the sealing end and into the port where it was installed I discovered the problem.

The reducer was bottoming out before the cone and seat were making contact. If used some Persian Blue (spelling) on the end of the reducer to discover it.

I trashed the reducer and replaced the line with one I bought that had the correct different sized fittings on it already.

 

[MustangPaul]

Hmmmmmm. I wonder. . . . That is one that I never thought of!

Any trick to removing these lines? The fitting at the adjuster for the rear brakes doesn't look like it has budged in 30 years. I used a line wrench (flared wrench) to get the ones off of the old MC and had to use more force than I wanted to use to get it to loosen.

Boy--all of this trouble just to stop the car. Sheesh!