Spit front braided brake hose - not much thread!

[Benjamin Swatton]

The braided hose on my car has very little thread just 1/4inch and by time you have inserted in caliper there is only 1/8inch depth of thread holding hose on ! - I'm finding even with new copper washer it does not want to seal on one caliper side and I'm v worried about stripping especially as some overhauled caliper threads seem a bit tired - although I've had this braided on for 20k, I'm seriously toying with going to rubber as they have 1/2inch of thread. Is there any problem running rubber when the rear brakes are on braided?

[RobPearce]

What make of hose? If I'm interpreting your description right (photo would help) then it's simply not to an acceptable spec.

[Benjamin Swatton]

Came with car will check have yellow tag,  all manf. /suppliers seem the same judging by on line photos can't tell Goodridge ones though as photos show end caps on them all

[Benjamin Swatton]

These are goodridge hoses compare them to a standard rubber hose in photo

The problem is made worse by the fact that the thread in type 12 calipers starts 3mm into bore.  Note also the copper washer NOT shown in photo is approx 1mm thick which needs to be taken into account So  what this means is for the good ridge hose you have by measurement just 2.8mm depth of thread holding the hose on which is just 3 turns of thread... the rubber hose you have 7mm of thread which is 7 turns of thread...

And early cars have single circuit brakes so there is no fallback second circuit if you have a failure... you make your choice

Edited September 5, 2021 by 13254
Sent before finishing

[Benjamin Swatton]

Other problem is good ridge hose has diameter reduction between thread and nut head this result in a very loose fit of washer and means it's lateral displaced as tightened meaning the seal is on a tiny sliver of copper. Rubber hose doesn't have this problem. Having fitted rubber I got an immediate and good seal. 

[RobPearce]

The end on that Goodridge hose is a taper fit, intended to seal at the tip, not with a copper washer. That's why it's got that "diameter reduction". I'd say it's not the correct hose for the application.

I don't recall what the hoses on my Herald were like - and it was type 14 calipers on that - but that's the only time I've put braided ones on that sort of fitting. All my current Triumphs have type 16 calipers with a short bit of rigid pipe between the hose and the caliper. No copper washers involved with that setup.

[Benjamin Swatton]

Yes the braided hoses came from paddocks, but the problem is the taper is too short I think to engage at bottom of caliper thread which does indeed have a taper but also bear in mind stsndard rubber hoses have no taper at all anyway! . Either way it appears a compromise from new unless anyone happens to still have an oem rubber  hose and can prove they had a taper. Ultimately the copper washer is the only bit doing the sealing so not the best.

[Nick Jones]

On 05/09/2021 at 20:02, RobPearce said:

The end on that Goodridge hose is a taper fit, intended to seal at the tip, not with a copper washer. That's why it's got that "diameter reduction". I'd say it's not the correct hose for the application.

I agree.  Unless it's fitted the wrong way round.  What does the fitting on the other end of the hose look like?

Nothing wrong with rubber hoses.  May give a slightly longer, softer pedal, but not sure it's enough difference to notice.  And you can see when they are getting past their best.

Nick