Question about 1998 Oldsmobile 88
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Posted on Jan 02, 2017
Depends on your mechanic ablilites. Steel brake line is basically 0.188 inch diameter line, and the metric 6mm line dia is very closely same.
Dodge uses ISO bubble flare , and not the American standard double flare at the end of the steel tube line. This ISO bubble flare on the steel line then fits into its mate female end which is the rubber hose connector end.
So, easiest way to get rid of the ISO bubble flare and change to American double flare end is:
Some automotive stores such as Parts Plus Auto Stores carry the brass brakeline adapter which has one end being the male end that fits nicely into the rubber hose with its ISO bubble female fitting, while the other end of the brass line adapter is the female end which has the double flare so you can then insert the steel line replacement with standard double flare into this end of the adapter.
Steel line , bungy brake line or equivalent is fine, and has the brake line nuts already on it, and is flared for you too. If you want to stay with ISO bubble line fittings you can get that in bungy brake line lengths too but it is less common for some stores to carry, and that is why the conversion brake line fitting adapter mentioned is so easy a way to change from ISO bubble flare to a double flare for easier use of all steel line being standard American double flared brake line. The brake lines come in straight lengths, 2ft 4ft, and 6ft, so you can use them to fit your necessary total length by connecting them with tubing couplers which the steel tube lines brake line nut gets threaded into.
My same year Durango had its rear line blow thru last year, due to the rusting of the steel brake line. I just got done last week, doing a entire steel line replacement myself. It was a medium sized effort for sure. You should check the other lines for the entire brake system to see if you need to replace more than just that section which failed for you, as my lines showed heavy corrosion at many other locations in the brake line system.
It is easy to double flare brake line tubing , and Sears sells its craftsman brand of brake line double flare tool kit for that purpose at about 60 bucks if I recall it right.
One thing you should do when doing your own double flaring, is to use a dial caliper to measure the diameter of the flare at its widest flared end, to insure you are within the required diameter of flare to insure proper sealing when you tighten down the tube flare nuts. I recall the flare diameter is supposed to be 0.272 inches , plus or minus 0.006 inches ( so range of dial caliper measuring of that formed flare should be between 0.266 inch and 0.278 inch) to insure the right diameter of flare for good sealing.
You can also get steel galvanized tubing line in coils of 20ft and more, with a bunch of brake line nuts ( all this is standard american brake line nuts, for double flared line fitting) from Inline Tube company; www.inlinetube.com.
Check out the great tech info from FEDHILL website, www.fedhillusa.com
Good luck, I did it so you can do it and feel satisfied and safe for the family with solid and sound steel line that is much better than chancing an accident via leaving the rusted line in place.
Posted on Aug 07, 2008
SOURCE: Flare nut wrench size?
try metric size. a flare wrench is an closed end wrench with a little **** in big enough to to slide over the line and then around the bolt its grabs mor of the bolt than a regular wrench
Posted on Dec 13, 2008
Which brake line are you talking about?. The metal steel ones,or the rubber ones. Doesn't matter. If you are buying the rubber ones, then just ask for them by year and model of truck.
If you are working with the steel ones, they are either going to be 5/16 or 1/4 depending which line it is. the 5/16 ones are usually attached to the master cylinder or the ABS unit. The fittings sometimes if you don't find the right one have to be re used, in which case you will need to flare the tubing. (Double Flare) Or you can go to the dealer, pay an arm and a leg, but you don't have to flare the tubing, which takes the fun out of the job.
Posted on Apr 07, 2009
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