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Slight modification of brake flexi's

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Yo,

Got some good ridge hoses for my VWII brake setup,

The front calipers are the type where the flexi screws directly into the caliper with a tapered seat on the end, like a bleed nipple.

My flexi's have these ends on them:

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675abc88.jpg

Now I don't see this method of sealing an issue (copper washer to caliper body) however, due to the thread length the fitting bottoms out in the caliper thread before the washer will be being compressed,

Can anyone see a problem with me shortening the fitting on the hose by around 3-5mm, maybe not even that much, just to get rid of the step at the end of the thread, to allow it to screw in more and tighten to the washer?

If not it looks as though I could use some sort of olive to sit on the taper in caliper and the taper in the end of fitting, but I'm not sure I'm keen on that.

I think it will be fine doing what I have described above, just wondering if anyone else had any ideas or an opinion, obviously the hose will be cleaned out from any dirt or swarf/filings before fitting

Thanks

Nick

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Why not just screw it in and see if it seals itself just do it to a certain torque and te end should seal against the taper in the caliper

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Because its not a tapered end so would just be the stainless fitting probably cutting into the caliper, i wasn't keen on that idea tbh, I could do that and try pulling a vacuum but I wasn't keen

I've had this sort of problem beofre, hence why I've been through so many sets of braided lines. You have the wrong sort of fitting on the end there, it should be an inward flare, thus rolled and with a radius. I wouldn't want to just have the copper washer sealing the lines tbh. Last time i did that, the things leaked. Are you sure you ordered the correct ones?

Why not try a male to female adaptor to screw into the caliper? And are you sure thats not a rear line? Did you buy a 4/6 line set?

Edited by prankstar2003

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I know it's the wrong sort of fitting lol.

4 hose kit for a G40, tbh have sealed things just with copper washers before with no issues, banjo bolts use them? Or maybe dowty washers could work.

No because the rear lines are shorter and fit fine, I don't wanna fuck around with adaptors, all you do is introduce more potential for leaks

Then send them back. I'm sure these are incorrect. I was sent a dodgey set by goodridge which had a super fine thread on them. Ended up buggering the whole set (don't ask!).

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Just weird how they have a copper washer too

It's good practice to seal with a copper washer wherever copper is absent (e.g. where your braided line meets the caliper, as it does here, but where a copper hardline meets a fitting, its unnecessary). Even so, cutting your fitting and then sealing with a washer is not the way it was designed. I can't see a massive problem with your cutting idea, but being someone who likes to do things properly, I thought you'd want a proper remedy. The caliper inlet has a bowl like shape, and the fitting should have a complimentary shape also, which will help to do most of the sealing.

Edited by prankstar2003

Then send them back. I'm sure these are incorrect. I was sent a dodgey set by goodridge which had a super fine thread on them. Ended up buggering the whole set (don't ask!).

Due to your replies on here I'm going straight to HEL for custom lines.

I would recomend HEL. Full stainless construction (not the plated ends you see above) and custom to your spec. However, be very sure you specify the correct fitting on each end. The first set they sent me didn't go through the brackets in the chassis as it was the wrong type of female end.

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I do do things 'properly' at work we frequently tap into brake lines to fit instrumentation for measuring pressures and temperatures and dont have issues with copper washers.

The surface it would mount to on caliper is a flat machined surface, the surface of the fitting on flexi is machined, so the copper/dowty washer would be compressed between two flat surfaces, just like those between a banjo bolt/banjo fitting/banjo fitting/caliper?

  • Author

this isnt where a hardline meets a fitting :S its where the hose fits into the caliper, youve just contridicted yourself :S

I would recomend HEL. Full stainless construction (not the plated ends you see above) and custom to your spec. However, be very sure you specify the correct fitting on each end. The first set they sent me didn't go through the brackets in the chassis as it was the wrong type of female end.

I got Mk2 Golf rears and VWII fronts like you right?

No i haven't. I'm saying that there should be a copper washer wherever there is no copper pipe. Your flexi and caliper have no copper in them, so good practice is to add a washer. If this were on a copper line to fitting then you wouldn't need the copper washer, as the copper of the brakeline should make the seal

I'm not saying that a copper washer wouldn't work, but I wouldn't do it myself after the problems I have had with my brakes. It's up to you, if you just want someone to say 'go ahead' then go ahead. But I'm offering my advice here. I've had a massive ballache with similar problems to you here, and I'm not taking chances with my brakes. If your happy to cut the fitting down, then go for it, it will most likely work

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soz man haha i am literally so tired right now!

ideal frame of mind for brakes work haha.

i understand your point, will have a think. tbh i only wound them in by hand so might not even need cutting down lol.

i could use PTFE tape yhyh safe

I would recomend HEL. Full stainless construction (not the plated ends you see above) and custom to your spec. However, be very sure you specify the correct fitting on each end. The first set they sent me didn't go through the brackets in the chassis as it was the wrong type of female end.

I got Mk2 Golf rears and VWII fronts like you right?

Nope. I have girling 54s (so VAG 256mm) up front, and mk2 rear discs. You'll want banjo bolts for the rear M10x1 thread so that they dont poke too far down (your going to have to mount your calipers upside down too, or else your handbrake adapter/cable wont fit) and an m10x1 female with 14mm (iirc) head fitting at the hardline end. See my thread, all in there.

soz man haha i am literally so tired right now!

ideal frame of mind for brakes work haha.

i understand your point, will have a think. tbh i only wound them in by hand so might not even need cutting down lol.

i could use PTFE tape yhyh safe

Eric stylee yo?!

Give them a good screw in then boss. Though I can't see you making up 3mm that way

  • Author

that was just a guesstimate lol, i could just braze them into the calipers, wont leak then!

I would recomend HEL. Full stainless construction (not the plated ends you see above) and custom to your spec. However, be very sure you specify the correct fitting on each end. The first set they sent me didn't go through the brackets in the chassis as it was the wrong type of female end.

I got Mk2 Golf rears and VWII fronts like you right?

Nope. I have girling 54s (so VAG 256mm) up front, and mk2 rear discs. You'll want banjo bolts for the rear M10x1 thread so that they dont poke too far down (your going to have to mount your calipers upside down too, or else your handbrake adapter/cable wont fit) and an m10x1 female with 14mm (iirc) head fitting at the hardline end. See my thread, all in there.

Ok, i bought a few sets of these so hopefully i wont be flipping my brakes: http://www.ebay.co.uk/itm/220607925794#ht_3597wt_905

Will check your thread again :-)

You will be! Next time your under the car, look where the handbrake bracket on the caliper is (that machined hole) and imagine that adapter in place. Unless you can run your handbrake through the rear beam, your going to be running them 'upside down'

  • Author

i just found my PTFE tape, close thread

prankstar2003: GOD DAM IT!

Sorry, but just trying to save you the hassle I've had. Think mine's aer all sorted now, but we'll find out when I bleed them later in the week

Think i just got myself a pair of Mk4 calipers now for the price of postage so i might just use them on the Polo instead of my Corrado.

Check this thread out

http://www.polog40.co.uk/forum/index.php/topic,7594.0.html

These were a set I got off a Bready g40 conversion there was a receipt for the lines that said g40 on them too

Tres bizarre. I've never have a problem with mine sealing, I don't think any of my go in flush and I've never used ptfe tape, was more worried that it would degrade with the fluid and lose its tightness caused by the ptfe. I just tightened the lot as much as they would go, bled the system, checked for leaks every few days after and when I give the cars a check over . Done that for years now!

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