Brake Caliper leaking fluid from connection with brake hose?!?

[prestige.phantom]

Hello all, I have been going through the worst possible brake install of all time. After fixing a series of unfortunate issues, I though I was finally done and bleed the system twice.

Unfortunately this presented another issue, which I was wondering if anyone knew how to solve?

The front S8 brake calipers appear to be leaking fluid out of the connection with the front brake hose. I dont recall any issues when installing the hose, so my concern is that the connection thread is stripped. Anything else I should check / try before I start looking around at machine shops to fix the caliper? Any help would be greatly appreciated.

Thanks!!

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[Audibot]

How tight (or not) did you thread that connection in? Loosening the one on the old caliper will give you an idea how tight it needs to be?

And when you installed the hose, did you turn it left to seat it before turning right to tighten it? (i.e., not cross-threading).

PS: I am sorry to hear about all your issues!

[Gwillplays]

Do a visual check of all attached items at that junction. Check threads on brake hose for cross threading, check caliper for collapsed threads - due to cross threading. Lastly, check the caliper for hairline cracks at brake line mounting point. First two scenarios are easy to resolve, cracked caliper not so.


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[Spike00513]

I would check the threads

[prestige.phantom]

How tight (or not) did you thread that connection in? Loosening the one on the old caliper will give you an idea how tight it needs to be?

And when you installed the hose, did you turn it left to seat it before turning right to tighten it? (i.e., not cross-threading).

PS: I am sorry to hear about all your issues!

Itt was tight, but I was careful not to over tighten it. I did not turn it left before turning it right. I was unaware that was how you were supposed to do it...

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I would check the threads

This is my worry exactly...

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Planning on carefully removing the hose today, and inspecting the threads. If they dont look too bad then I am going to try to reinstall the hose and see if it leaks again.

[Valpo A7]

Pull it back apart and check the threads for sure. Check the seat on the caliper where the sealing surface is. Might be a problem with caliper itself.

I just looked at some pics of S8 hoses and it does not appear that the threads seal anything. The sealing surface is the flared end. You have a bad hose end, possibly not tight enough, or crap in the seat, or possibly the wrong hose with the wrong flared end. The angle on the hose end must match the caliper seat angle.

[Alabama]

Pull it back apart and check the threads for sure. Check the seat on the caliper where the sealing surface is. Might be a problem with caliper itself.

I just looked at some pics of S8 hoses and it does not appear that the threads seal anything. The sealing surface is the flared end. You have a bad hose end, possibly not tight enough, or crap in the seat, or possibly the wrong hose with the wrong flared end. The angle on the hose end must match the caliper seat angle.

Is it my imagination or do the exposed threads look off-angle? If the caliper was already mounted when you were fixing the hard line, could some debris have gotten in? Keep at it!

[Valpo A7]

Is it my imagination or do the exposed threads look off-angle? If the caliper was already mounted when you were fixing the hard line, could some debris have gotten in? Keep at it!

Possibly.

It’s hard to tell from this pic and I am on my phone so I am looking at a postage stamp of a picture. Plus the caliper is at an angle and the camera is at an angle so it might look deceiving. From pics of new hoses I don’t think that the hose would have gotten this far into the caliper being cross threaded. It should have been hard to turn well before the end gets seated.

[prestige.phantom]

The threads were pretty poor. I am having it professionally repaired. Will update if this fixes the issue.