https://www.r3vlimited.com/board/ en Sun, 04 Oct 2026 16:08:19 GMT vBulletin 60 https://www.r3vlimited.com/board/images/misc/R3V.jpg https://www.r3vlimited.com/board/ https://www.r3vlimited.com/board/forum/e30-technical-forums/suspension-unsprung/brakes-subframe-arms/10167354-caliper-hose-thread-repair Sat, 26 Sep 2026 17:35:20 GMT
I am sure I accidentally diminished the thread teeth while cleaning rust with vinegar. The vinegar didn't cause harm anywhere else (bore and bleeder threads are perfect) but I guess the hose threads got a bit eaten. Lesson learned the hard way, I will sandblast after masking from now on.

Since the threads are there I am not sure which method of thread repair to try. I want to make clear that while the threads look intact by eye, the brake hose fitting wiggles around until the end when it holds a little pressure before beginning loosening.

Does this sound like I could have luck with a thread repair bit? I have never used one and I understand they are different from taps, which I have used plenty of. My brain can't see how loose/diminished threads could be made whole again with this method.

I have had some luck with helicoils before but never used one on a hose thread. I have not used timeserts and in this application I am unsure they would work. Timeserts might prevent the brake hose from going deep enough in caliper to mate with the caliper flare area.

I did a full cleaning, epoxy paint job and rebuild on these before realizing the hose threads were no good. If I can I want to salvage them instead of getting new ones.

What do you think?]]> 88Sedan https://www.r3vlimited.com/board/forum/e30-technical-forums/suspension-unsprung/brakes-subframe-arms/10167354-caliper-hose-thread-repair