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Car Forum / Toyota / Toyota Cars / October 2008Fitting at New Brake Hose Leaks
The brake hose on my 94 Camry burst. After I replaced it the fitting leaks where the steel line meets the hose. It's not cross threaded and once it began leaking I tightened it more than I felt comfortable with and it still leaks. I've not run into this before where the fitting screws in properly and the junction leaks. Here are pictures of the fitting/junction http://img89.imageshack.us/my.php?image=leakingfittingkp5.jpg Anybody have suggestions/explanations/ideas? > The brake hose on my 94 Camry burst. After I replaced it the fitting > leaks where the steel line meets the hose. It's not cross threaded [quoted text clipped - 6 lines] > > Anybody have suggestions/explanations/ideas? That doesn't look like an OEM hose. I'd bet that's the problem. Bring it back and get another one, or a different brand. Or, get one from Toyota. Ordinarily I'd put Teflon tape on a fitting like this, but brake fluid is nasty stuff. It might not work. It also looks like the nipple isn't seating in properly. Try a different hose. > That doesn't look like an OEM hose. I'd bet that's the problem. Bring it > back and get another one, or a different brand. Or, get one from Toyota. [quoted text clipped - 4 lines] > It also looks like the nipple isn't seating in properly. Try a different > hose. Yup, take it apart and see if the sealing faces are wienered.. maybe taking it apart and putting it back together will work. >wienered What does wienered mean? >> The brake hose on my 94 Camry burst. After I replaced it the >> fitting [quoted text clipped - 17 lines] > fluid is > nasty stuff. It might not work. Teflon tape is not recommended for this application. Brake fittings do not seal on the thread. They seal on the flare. My guess is that the actual sealing surface is damaged. allowing fluid to leak past the intended sealing surface and escape by the threads. Pipe threads are designed to seal on the threads, and Teflon tape is useful for those types of threads. Brake fittings do not use pipe threads. Ed > It also looks like the nipple isn't seating in properly. Try a > different > hose. > The brake hose on my 94 Camry burst. After I replaced it the fitting > leaks where the steel line meets the hose. It's not cross threaded > and once it began leaking I tightened it more than I felt comfortable > with and it still leaks. I've experienced that when the flare joint had debris or scoring on its surfaces or when the flare was malformed. Don't try to fix this by sealing the threads, except in an emergency, since it's the flare joint, not the threads, that are meant to do the sealing. > The brake hose on my 94 Camry burst. After I replaced it the fitting > leaks where the steel line meets the hose. It's not cross threaded [quoted text clipped - 6 lines] > > Anybody have suggestions/explanations/ideas? Looking at the photo, it looks like the fitting for the steel line is leaking, not the hose. If the hose is leaking, it may be the wrong size or type of thread.  SignatureRay O (correct punctuation to reply) >> The brake hose on my 94 Camry burst. After I replaced it the fitting >> leaks where the steel line meets the hose. It's not cross threaded [quoted text clipped - 11 lines] > >If the hose is leaking, it may be the wrong size or type of thread. That is my thought - there are differences between SAE Flare (American), JIS Flare (Japanese) and DIN Flare (European), even though the nut threads may match the flare types and angles do NOT. There is single flare, double flare, and a diamond or 'bubble' flare, and different face angles... If it won't seal, the vendor probably sold you the wrong part. And since this is a safety issue, they really have to make it right or refund your money. In a pinch, you could look for the annealed copper flare gaskets used on refrigerant lines - it's a crush washer in a cone shape to fit between the tubing and fitting. But this should not be viewed as a permanent fix, since brakes run at 2,000 to 3,500 PSI or more and refrigerant lines only run at 300 to 400 PSI on the high side. I wouldn't want to stab the brakes in an emergency and have the gasket blow out - that would be bad... --<< Bruce >>-- Thanks for the comments. I haven't decided what to do. The parts dealer says it's my part and refuses to give me a refund. I argue it was not leaking at this fitting with the original part -- I replaced the hose because it burst/split. He will exchange the part but it seems likely to me if one of theirs doesn't fit right none will, and I don't want to install another to find out. Also, then if it doesn't fit I'm sure he won't refund and have to eat two of them. > Thanks for the comments. I haven't decided what to do. The parts > dealer says it's my part and refuses to give me a refund. I argue it [quoted text clipped - 5 lines] > find out. Also, then if it doesn't fit I'm sure he won't refund and > have to eat two of them. First of all, did you match the parts when you bought them? It's a very good habit to get into. Secondly, if all else fails take the other brake line off and see what kind of fitting/flare you have. BUT before you do all that make sure all the common sense stuff is in order, i.e. debris, nicks, gouges, female end looks in good condition, etc. Make sure your brake line is the proper size also, easy to get 3/16 instead of 1/4 sometimes. Use the other brake line for reference. >First of all, did you match the parts when you bought them? It's a >very good habit to get into. I'm not sure what you mean by match the parts. If you mean compare the replacement with the one I took off, yes I did, and except for a mounting bracket near the center of the hose they looked alike. Also, physically, it fit properly. >Secondly, if all else fails take the >other brake line off and see what kind of fitting/flare you have. There is no need to compare. I am the original owner and have done all brake related repairs myself. The brake line and hose were original equipment. >before you do all that make sure all the common sense stuff is in >order, i.e. debris, nicks, gouges, female end looks in good condition, >etc. Looking down into the end of the hose that the flare fitting goes into it looks clean, smooth and in good condition, but it's too small to go down into to touch it. Since my original post I have removed the fitting and the flare seems very rough to the touch. But, again it is the original equipment and was not leaking before the hose replacement. >Make sure your brake line is the proper size also, easy to get >3/16 instead of 1/4 sometimes. Use the other brake line for reference. The brake line is original equipment. The brake hose is the replaced item and it looks and fits the same. > Looking down into the end of the hose that the flare fitting goes into > it looks clean, smooth and in good condition, but it's too small to go > down into to touch it. Since my original post I have removed the > fitting and the flare seems very rough to the touch. But, again it is > the original equipment and was not leaking before the hose > replacement. That may be your problem there, m8. The original might have been rough from the getgo and never was a problem until the original hose split on ya. The dude at the factory on the assembly line probably He-Manned it together and it wasn't a problem until you untightened it.. Only thing I can think to suggest would be to take a small jeweler's file or something to that effect and try to get rid of the roughness.. Try not to get any shavings in anything, of course. After you do that, try to put it back together and see if it leaks.. Reminds me of the time I watched a friend learn about crush washers.... he bought a new set of brake lines for his motorbike ... tried to tighten them, but was unhappy with the position (about 5 times)... wondered why fluid poured out of the banjo fitting... LOL.... i told him beforehand, but he knew better. After all, I had only been a mech. for 6 years at the time and he had been selling stolen motorcycle parts on Ebay. So he definitely knew more than me! LOL > Thanks for the comments. I haven't decided what to do. The parts > dealer says it's my part and refuses to give me a refund. I argue it [quoted text clipped - 5 lines] > find out. Also, then if it doesn't fit I'm sure he won't refund and > have to eat two of them. Jim, My recommendation is to go to your local Toyota dealer and get the correct hose. SignatureRay O (correct punctuation to reply) > Jim, > > My recommendation is to go to your local Toyota dealer and get the correct > hose. you're right, Ray. we shouldn't have given him anything but that advice you just said... for safety reasons. On Sep 29, 8:42 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote: > Jim, > > My recommendation is to go to your local Toyota dealer and get the correct > hose. you're right, Ray. we shouldn't have given him anything but that advice you just said... for safety reasons. ******** Bottom line, the OP was sold the incorrect part. Brake lines should never be jury-rigged. SignatureRay O (correct punctuation to reply) |
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