Residual brake valve leak

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Litldv8
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Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

Residual brake valve leak

Post by Litldv8 »

Hey all. Residual valve in the brake lines seems to leak from the brass fittings that go into the alloy housing.
I have tightened them up as tight as I dare. The brass fittings are a tapered thread.
Should there be any sealant on them?
Any clues?
Litldv8
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Re: Residual brake valve leak

Post by Litldv8 »

hudson nut
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Re: Residual brake valve leak

Post by hudson nut »

Tapered threads should not require any sealant.
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Chrisso
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Re: Residual brake valve leak

Post by Chrisso »

What Dany said!! :wink: :wink:
enjenjo
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Re: Residual brake valve leak

Post by enjenjo »

I had the same problem On the last car I did. The problem ended up being the brass fitting. I replaced it with a different brand fitting and no more problem. Not even some teflon sealant helped the first fitting.
People who think they know it all, bother those of us that do.
Litldv8
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Re: Residual brake valve leak

Post by Litldv8 »

I fitted three yesterday and all three weep from both sides
34 tub
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Re: Residual brake valve leak

Post by 34 tub »

Hi Litidv8
Its the tapered thread, we do not use taper thread fittings on brakes here in Australia its a USA thing.
You are mixing two different systems together and it does not work.
Try a brake specialist for advice or adaptors

Thanks David
Greg N Smith
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Re: Residual brake valve leak

Post by Greg N Smith »

Hi Litldv8

What vehicle are we talking about ?

Drum Brakes and 10 psi Residual Pressure Valves ?

Disc Brakes and 2 psi Residual Pressure Valves ?
Litldv8
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Re: Residual brake valve leak

Post by Litldv8 »

1940 chev pickup. Master cylinder is under the floor. I am using a 10 lb one for the rear drums and 2 lb ones on the front discs. Will post some photos when I work out how to.
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FRANK BASILE
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Re: Residual brake valve leak

Post by FRANK BASILE »

34 tub wrote:Hi Litidv8
Its the tapered thread, we do not use taper thread fittings on brakes here in Australia its a USA thing.
You are mixing two different systems together and it does not work.
Try a brake specialist for advice or adaptors

Thanks David
Good tip. Everyone of these I have purchased though has come already fitted with the brass adaptor.
OZ-E-Rodders Rod and Kustom Club Member #31
Litldv8
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Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

Re: Residual brake valve leak

Post by Litldv8 »

It's the brass adaptor leaking where it goes into the valve
Neil
Litldv8
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Re: Residual brake valve leak

Post by Litldv8 »

Hey all it would appear that I think I have solved my drama. The brass adaptors are damaged where the Bundy tube flare seats on the adaptor. So I have sourced some steel adaptors and used some sealant on the thread where it goes into the valve. So far so good. No leaks. Thanks for the advice, Neil
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