Residual brake valve leak

Go here for posts about rebuilds, parts and problems
Post Reply
Litldv8
Posts: 13
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
Posts: 13
Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

Re: Residual brake valve leak

Post by Litldv8 »

hudson nut
Posts: 430
Joined: Wed Mar 25, 2015 4:50 am
Location: Riverside Calif.

Re: Residual brake valve leak

Post by hudson nut »

Tapered threads should not require any sealant.
25 Hudson speedster project
29 Hudson coupe
36 Hudson 4dr sedan
36 Hudson LWB 4dr sedan
40 Hudson 2dr sedan
41 Hudson coupe
54 Hudson coupe
User avatar
Chrisso
Old Hand
Posts: 4178
Joined: Thu Apr 12, 2012 10:44 am
Location: Albury NSW

Re: Residual brake valve leak

Post by Chrisso »

What Dany said!! :wink: :wink:
enjenjo
Senior Member
Posts: 1050
Joined: Sun Jun 23, 2002 10:45 am
Location: swanton ohio
Contact:

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
Posts: 13
Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

Re: Residual brake valve leak

Post by Litldv8 »

I fitted three yesterday and all three weep from both sides
34 tub
Posts: 174
Joined: Wed Oct 26, 2005 7:15 am
Location: Adelaide

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
Senior Member
Posts: 1070
Joined: Thu Jan 05, 2006 1:47 am
Location: Sunshine Coast QLD

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
Posts: 13
Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

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.
User avatar
FRANK BASILE
Old Hand
Posts: 13902
Joined: Wed May 07, 2003 3:14 pm

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
Posts: 13
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
Posts: 13
Joined: Wed Jun 29, 2016 9:12 pm
Location: Toowoomba qld

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
Post Reply