Rear Brake Flex Line

davids2toys · #1 (**permalink**) 06-28-2015, 07:36 AM

OK, this might seem like a stupid question, but I am puzzled at the moment, so I have to ask.
The male side of the flexible line is a regular flare(concave). It goes into a three way tee mounted on the Chassis. It seems to be this fitting:
http://www.summitracing.com/parts/ea...0erl/overview/
notes on part: "3/8-24 in. inverted flares on the runs, 3/8-24 in. female straight threads on the branch. 1/4 in. mounting hole". The female on the tee to accept the male fitting on the hose is the "3/8-24 in. female straight threads on the branch"
The bottom of the fitting is not flared to match the male hose fitting going into it. This is what I had on the car and it wasn't leaking. It also did not have sealer or tape on the threads. So is this set-up correct? I don't get it. Can someone explain it to a stupid guy(ME)???

Thanks...Dave

davids2toys · #2 (**permalink**) 06-30-2015, 08:39 PM

I am thinking the bevel in the very front is doing the sealing. The new line is on the left

Large Arbor · #3 (**permalink**) 07-01-2015, 06:46 AM

The other thing i did last time I had the rearend out was add speedbleeders. They helped immensely when you only have one person bleeding brakes! They were $6 per wheel.

Phil

Shootnride · #4 (**permalink**) 07-01-2015, 07:01 AM

Dave,

The fitting on your new hose appears to be designed to work with all three applications, ie;. male flare, female (inverted) flare or straight thread. The fitting on the old hose appears to be straight thread only.

Ted

davids2toys · #5 (**permalink**) 07-02-2015, 05:48 AM

Phil,
I have the speed bleeder in hand and will be installing them. I got the ones with the high hex sides SB3824L, see pic here: http://www.speedbleeder.com/size.htm , so it will be easier to bleed from underneath the car without taking out the interior

Ted,
It appears that way. I don't understand how the old fitting was sealing and not leaking up the threads. As a precaution, I am installing these Parker 2GF-3 copper flare gaskets recommended by Kevin when I called him about this situation. I have read great things bout these little buggers.
Parker 2GF 3 Flare Gasket 45 Deg Copper Flare PK 10 | eBay
He seems to think that the bottom of the tee fitting on the car is slightly beveled and will mate to the out side bevel on the hose male end he sold me.
This is the way I will be installing. I am also going to installed one in the female side on the other end of the hose...cheap insurance!

Shootnride · #6 (**permalink**) 07-02-2015, 06:39 AM

David,

Over the years I have encountered quite a few different combinations of brake line fittings and usually when a straight thread fitting was used, it had a flat copper gasket/washer that seated between the flat on the hex portion of the hose fitting and a flat on what ever fitting it was screwed into when tightened. I have only used the copper seat flares on male flare fittings, not on the inverted flare fittings (that doesn't mean that it won't work, I've just never had a need to do it). The copper seat flare that is shown sitting in the inverted flare of your hose fitting (your last photo) looks a little large for the application, but I suppose it may work as long as there isn't any interference with the internal threads.

Sometimes brake line fittings can be a pain in the butt. Hope it all works out well.

Ted

davids2toys · #7 (**permalink**) 07-03-2015, 06:09 AM

Very interesting Ted...I wonder if what I am looking at down inside the tee fitting is a actually a gasket and not the brass surface I thought I was looking at. I will have to check it out when I get back from vacation. Edit. I looked and it is not a gasket. I also have determine it is definitely sloped down towards the center. Therefore it would be sealing to the outside bevel on the hose male fitting
I think the gasket looks bigger than it really is, and the hole in the center is tiny. To me it looks like it will form to the outside bevel at that is it. Besides, even if it did touch the threads I would not think it would matter because the threads are not doing any of the sealing? That is also one of the reasons why you don't put any sealing compounds or tape on the threads because mating surfaces are supposed to be doing all the sealing.
The reason I was thinking of putting it on the other end also is so the metal brake-line flare would not deform the inverted flare like the original I took off the car that I am replacing.
Dave