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-   -   Question on installing brake lines/fittings... (http://www.clubcobra.com/forums/shop-talk/101410-question-installing-brake-lines-fittings.html)

RedBarchetta 12-10-2009 09:45 AM
Question on installing brake lines/fittings...
 
I bought some braided brake lines from Olthoff's (with the proper fittings for my SPF) a few millennia ago and will probably use the wet(ter) winter months to finally tackle this.

Any tricks that I need to know (i.e. do you use a teflon paste/tape for sealing to the caliper)? I've done brakes a gazillion times on cars but have never R&R'd a brake line.

Thanks for the advice,

-Dean

blykins 12-10-2009 11:11 AM
Nope, no sealer. The fittings in the calipers are usually flared or pipe thread. Braided hoses usually use AN fittings.

Just make sure the fittings are the correct size, pitch, flare, etc.

Chaplain 12-10-2009 11:55 AM
My calipers are Wilwoods and the calipers are tapped to 1/8-27 NPT. I used a 1/8-27 to -3AN male adapter. Then -3AN SS brakelines to the hardlines on the frame. For the 1/8 end into the caliper I used a little red Loctite. The adapters are cadmium plated steel the calipers are aluminum. I made the choice that a sealer was better than over tightening the pipe thread. I have no leaks.

RedBarchetta 12-10-2009 12:19 PM
Quote:
Originally Posted by Chaplain (Post 1008674)
I made the choice that a sealer was better than over tightening the pipe thread. I have no leaks.
That's sort of where my mind is at, too. Just want to gather as many opinions on the subject, thanks.

-Dean

Rick Parker 12-10-2009 12:53 PM
Dean many use an adapter part of which is NPT on one end and AN-3 on the other, no sealer is used, mechanical seal entirely. On some calipers the attaching hole is a straight thread and uses a Banjo bolt with copper or aluminum crush washers on either side of the Banjo itself.

RedBarchetta 12-10-2009 02:11 PM
Quote:
Originally Posted by Rick Parker (Post 1008690)
Dean many use an adapter part of which is NPT on one end and AN-3 on the other, no sealer is used, mechanical seal entirely.
Rick, that may be what I have here. Adapter to the factory Wilwood calipers was provided. It's a straight fitting (i.e. no banjo...I'm familiar with how those work).

My thinking is if you use sealant for the pipe threads on a mechanical fuel pump, why wouldn't you do the same with a brake line that is also carrying a thin fluid that is under pressure?

-Dean

Calbullet 12-10-2009 02:52 PM
Dean make sure you use a good flare nut wrench. I used the flex head ones from Griot's. the fittings on the hard line are a bear to get to.

RedBarchetta 12-10-2009 03:19 PM
Cal, thanks for the heads-up. I might even hit all of them with a little shot of PB Blaster the night before just to loosen them up some.

Calbullet 12-10-2009 03:30 PM
Dean, another thing , on the rubber hoses to the calipers, the fitting were pretty tight on mine, I just cut the hose off at the fitting, and stuck a socket on them to take them out. didn't want to round off the fitting.

RedBarchetta 12-10-2009 04:46 PM
Yes, I thought about that, too. The old hoses aren't going back on, and it's not like someone else is game enough to install old brake lines (though I could be wrong on that one!).

jwoodard 12-10-2009 05:10 PM
Dean,

I installed the Olthoff braided lines on #1938, shortly after getting the car on the road in early 2005. I didn't use any sealer or tape and haven't had any issues since. I believe the experts advise against using sealer/tape, but for what reason I don't know. You might call Dennis and ask for his advise.

:3DSMILE::3DSMILE::3DSMILE:

Gunner 12-10-2009 05:13 PM
Quote:
Originally Posted by RedBarchetta (Post 1008704)
My thinking is if you use sealant for the pipe threads on a mechanical fuel pump, why wouldn't you do the same with a brake line that is also carrying a thin fluid that is under pressure?
Because sealant will make a joint more forgiving if there are tiny mechanical discrepancies... up to maybe 100 psi or so.

At the thousands of PSI in a brake system, you have it mechanically perfect or it's going to leak. You hope all it does is leak... :eek:


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