hello all as I finish up dissassembly of my 82 GTSi, i have found a couple of the brake fittings to be so stuck that a couple of the fittings are being mauled by my tools to get them broken loose. it looks like the lines have not been touched since new. The metal lines look to have bubble flares, not inverted flares. although the heads of the fittings are metric (11mm), the threads seem to be identical to loose line nuts i have from previous projects, which I though were english, not metric. Main question is, does anyone know the proper thread for the fittings for the hard lines if I order? i am guessing the ones close to the wheels are 10 x 1.0 metric threads? If I make up new lines, i think i can use standard 3/16" metal line. the metric equivalent is 4.75mm. When i restored my Pantera, I changes all the fittings from bubble to inverted flare, and make all new lines up myself. it was quite a project. Does anyone know if anyone makes pre-made metal lines for the 308? the usual vendors (inline tube and classic tube) do not appear to. also, are bubble flares more likely to leak when re-assembling? should I not even try to re-use the old lines, on the ones where i did not destroy the nuts. (In all honesty, i have only messed up 2 nuts) justin
They are bubble flares, 3/16 line is good, bubble flares do not leak on reuse unless they have been previously overtightened. It’s worth some effort not to mess up the short S-shaped lines right at the calipers, the tight curves make reproducing these without kinking difficult. It’s hard to tell 3/8-24 from M10x1.0 by looking at them (but you will strip threads and ruin stuff if they’re mixed up).
thanks makes sense 3/8 is just about 10mm, and 24 threads per inch is just about 1mm per thread i wonder if the fittings are made differently or if they are the same, but labeled differently when sold. regardless, i'll buy the metric fittings because it's not worth taking the chance
NO. They are not the same. It is really unfortunate that they are close enough to be confused, it’s enough of a trap for the unwary that FedHill (a vendor that I highly recommend) even has a tech note on “Common crossthreads”.
