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Old 09-09-2020, 11:34 PM #1
dvto2 dvto2 is offline
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Rear brake lines...

One of my rear brake lines ruptured just behind the gas tank. The ends and fittings of both rear brake lines are very rusted and I should probably just replace everything. Should I just go to the dealer and order all the parts or are there after market venders I should consider? This is 2005 4.0 Sport with 265k. The engine runs fantastic but there is a lot of rust underneath, including at least one hole in the frame.
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Old 09-10-2020, 09:01 AM #2
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The burst line is the right line in the second picture, just behind the gas tank. The junction that connects that line to the front of the car also looks bad. Is there a reason there are flex lines from the burst line to the axle or can I replace everything with hard lines?
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Rear brake lines...-screenshot_20200910-085414_gallery-jpg  Rear brake lines...-screenshot_20200910-085429_gallery-jpg 
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Old 09-10-2020, 11:27 AM #3
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That flex line it was allows the braking system to connect from the body to the axle assembly.

If that was hard-line it'd break as soon as there was any rear suspension movement from when it was installed.

Replace them with Stainless Steel brake lines like the below kit and forget about them.

Goodridge G-Stop 2" Extended SS Brake Line Kit for 2003-2013 Toyota 4RUNNER | eBay

This includes 6 extended lines for front, body to axle (the line that burst on your truck), and rear brake lines.
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Old 09-10-2020, 01:01 PM #4
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Of course, I didn't think of that. Those look nice, and I need them, but the line that broke is the one that runs from the flex line, over the gas tank, and then to about the middle of the suv.
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Old 09-10-2020, 01:34 PM #5
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Quote:
Originally Posted by dvto2 View Post
Of course, I didn't think of that. Those look nice, and I need them, but the line that broke is the one that runs from the flex line, over the gas tank, and then to about the middle of the suv.
Ah. Gotcha. Yeah, that's gonna be a PITA.

If it were me, I'd order those stainless lines above, new OEM brake fluid, and take it to your local independent Toyota specialist to have them do the work. Go ahead and replace all the soft brakes lines with the Goodridge kit while they have it and fill it up with some new fluid too.

I'd even consider replacing the other section of the brake line that runs alongside the burst line while they had it all torn apart.

Use some Stainless hardline or some Nickel-Copper alloy brake lines that will resist rusting and corrosion in the future too.
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Old 09-10-2020, 01:50 PM #6
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Do you have to drop the gas tank? You can't just snake new lines through?
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Old 09-10-2020, 02:03 PM #7
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Do you have to drop the gas tank? You can't just snake new lines through?
Not sure. If I were to do it in the driveway, I'd probably drop the tank just to save the headache of trying to snake the lines and work in a tight space.

Maybe someone else has experience with that job and can chime in with advice.
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Old 09-10-2020, 03:29 PM #8
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I replaced all the lines on mine with copper nickel line which does not rust and is easily bent & flared. 10MM ends in bulk. I also replaced the rear rubber lines while I was there, they are cheap.

I don't see how you could put a previously bent line over the tank without dropping it but one you are bending is doable. Chances are slim you'll get the old one completely out.

Amazon.com: 25 Ft. Roll/Coil of 3/16" (.028" Wall) Copper Nickel Brake Line Tubing: Automotive

Amazon.com: Metric Brake Line Invert Flare Fittings for 3/16" Tube. 10 x 1 mm (Pack of 10): Automotive
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Old 09-10-2020, 03:36 PM #9
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Ok. That's helpful. Is there a flare tool kit you would recommend? What kind of flares do you need for this?
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Old 09-11-2020, 12:42 PM #10
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Ok. Thanks to you all I've sourced most of what I need. I think I should replace this line connector in the middle of the car. Im having trouble finding it in any catalog. Should I just go to the dealer or can someone give me an online link?
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Old 09-11-2020, 03:57 PM #11
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Quote:
Originally Posted by dvto2 View Post
Ok. That's helpful. Is there a flare tool kit you would recommend? What kind of flares do you need for this?
A double flaring tool. You can borrow them from most auto parts stores. As for that coupler, most stores sell them without the bolt bracket but you could make that yourself or just zip tie it in place.
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Old 09-11-2020, 04:28 PM #12
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Thanks, all. I'm getting the coupler from the dealer. I've ordered everything else. Thanks, again.
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Old 09-12-2020, 04:42 AM #13
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Quote:
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Thanks, all. I'm getting the coupler from the dealer. I've ordered everything else. Thanks, again.
Mind listing the part #s you ordered for anyone that may run into the same issue in the future? Also, did you find out it ruptured while driving or in the driveway?
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Old 09-12-2020, 11:31 AM #14
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Happened while driving but I was close to home and made it home safe.

The coupler 47322B
The bolt 91641-H0820

Here is a screen shot of the pdf the dealer sent me.
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