[oldguy829]

I have adapted an oil overflow can (inverted) to use as a remote brake fluid reservoir. works great, but the fitting leak fluid. They used to be on top, and for oil, so they don't quite seal upside down with brake fluid in it. It leaks around the threads that hold the fittings in place (the fitting don't leak). Looks like a simple thread sealer would do, locktite maybe. But I think brake fluid is different from most petroleum products, so it needs to be impervious to brake fluid, and set up so it doesn't get into the system. Any recommendations?

[Deuce]

Fittings should NOT use any sealer ...
I would tighten it a little more

[oldguy829]

Deuce - the fitting is not in the system, it's in a modified remote reservoir. Not under pressure, just has to hold fluid. The fluid gets past the threads on the bolts that hold the fittings in place. It wasn't designed for this, but it will look cool if I can get it to hold fluid.

[Frisco]

Originally Posted by oldguy829

Any recommendations?

As long as the fittings are NOT the flared fittings and are tapered pipe thread fittings, you can use teflon tape.

[Henry Highrise]

If I understand you right ( and I may not be....have you got a picture? ).......and its a screw in fitting with a jam nut to hold it tight and in position....you are supposed to have a O- ring under the jam nut.

[oldguy829]

Henry, I think you are right. It didn't come with any, but it should have.
I know a pic would help, but I'm having trouble with the program, can't get it small enough to upload.

[oldguy829]

My brake fluid reservoir, not the system, is leaking around a bolt thread.
I'm thinking... gas line teflon tape, locktite, silicon gasket maker, etc. but I can't find any information on what is impervious to brake fluid, and I don't want to contaminate the system.

[427v8]

Teflon tape works very well.

Just make sure to keep it on the threads and out of the fluid.

Keith

[302 Z28]

Most brake manufactures Wilwood for example tell you not to use teflon tape on the fittings.

Vince

[oldguy829]

OK guys. Maybe some pics will get us all on the same page.
The container I have is a puke tank for some ricer turbo. I'm using it
as a remote brake reservoir. As you can see, the connections are just
tubes going into the container. they have a flat surface and are held
in by ordinary bolts. In the original application, these were on top
and overflow oil just dumped into it. The bottom has a large drain plug.
I'm using it upside down. I can seal the fittings to the can surface with
a gasket but fluid leaks past the threads in the bolt holes. It is a very
minor leak, maybe a drop an hour? I'm sure sealing the thread will solve
the problem. The simple question is, what can I seal the threads with that
is impervious to brake fluid and won't contaminate the system?
It's standard brake fluid, not synthetic.

[427v8]

Originally Posted by 302/Z28

Most brake manufactures Wilwood for example tell you not to use teflon tape on the fittings.

Vince

I think you are confused.

Teflon tape is recommended for pipe fittings in a brake applications, but not for flare fittings.
He does not have a flare fitting, it's either a pipe thread or a straight thread in which case it's OK to use teflon

[30desoto]

I would try PERMA-GASKET, brake fluid will not hurt it and it will not contaminate the system, but remember you don't need a gallon of it to do this.

30dee

[427v8]

looking closer at the pics it looks like there needs to be a better seal around the tubes that go into the tank. I would try to put an O-ring around the tubes to seal it, then teflon on the bolt threads.

[jimfulco]

I'd be tempted to try Permatex #2, but I don't know for sure if it'd be OK. I know the ethylene glycol in anti-freeze won't dissolve it, and brake fluid is glycol-based, but I don't know which glycol it's based on. Might be worth looking into.

[oldguy829]

427v8 - that's kind of where I am. O rings didn't work because the mount bolt is off to the side and would skew the whole thing, but I've made a rubber gasket that goes under everything and it seals fine. Probably going to assemble it with teflon tonight.
I've been soaking things in brake fluid this week. Locktite disinigrated. Silicon based gasket makers don't appear to be affected, but I notice the globs of it pull off the bolts pretty easy compared to the same "globs on bolts" control group out side the fluid, so I'm not comfortable with that. Teflon tape soaking in it for 2 days appears to be unaffected. I might try permatex next. If it works it would be a better all around solution. The rubber gasket is working, but may deteriorate over time, plus it allows for a certain amount of vibration I could eliminate with permatex.
Still open to suggestions, anyone?