brake line size
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Cargo Master
Joined: Mar 2006
Posts: 2,789
Likes: 5
From: Sand GAp, KY
brake line size
Hello, my stepson blew the line from just in front of the floor board to the rear diff. This is a 2003 4x4 V10, can anyone tell me what size line this is? He lives over 100 miles from me and I plan to go up there to fix it for him. He says there is splice just in front of the blow out so it should be easy enough to get to there. I am seeing conflicting sizes when I try to look it up, every thing from 3/16 to 5/16 and figured one of the guys on here would know. Thanks for any help you my be able to give.
Fleet Mechanic
Joined: May 2017
Posts: 1,314
Likes: 103
From: TN
Fleet Mechanic
Joined: May 2017
Posts: 1,314
Likes: 103
From: TN
Factory seems to be a nyclad product. Double check it. It's OD based measurement. Have your son check it before making the trip. I'd expect more than just that one area to rework to make it safe. If it's bad there, it'll be bad elsewhere.
Fleet Mechanic
Joined: May 2017
Posts: 1,314
Likes: 103
From: TN
100 mile road trip, so I'd want to have the entire thing, regardless of if you patch it or need some of the kit. Countless Ex's lost due to rotted lines.
Fleet Mechanic
Joined: May 2017
Posts: 1,314
Likes: 103
From: TN
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More Turbo
Joined: May 2015
Posts: 633
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From: Staten Island, NY
I also agree that you should change all the rear ones at least . I used the Dorman stainless steel kit after the third hole in the line that you are going to replace. Before that I also had to replace the lines over the rear which were also corroded. It’s not worth doing the work, just to have another one blow and then having to re bleed the system again. The Dorman kit is well made and fit great in my 03, you won’t be sorry that you used it.
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Thread Starter
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Cargo Master
Joined: Mar 2006
Posts: 2,789
Likes: 5
From: Sand GAp, KY
Thanks guys I will run it by him. He may get the kit I don't know for sure if he would have the money right now just helped him fence in 10 acres so money may be a little tight lol.
Freshman User
Joined: Mar 2021
Posts: 38
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From: Newburgh
I have a 2005 V10 and I live up in NY at the time so my brake lines are under constant attack from all the salt that they throw down during winter. I replaced the brake lines that you are talking about myself with a few tools and parts.
I would suggest that if you live in a rust prone area that you don't put steel brake lines back on and upgrade to copper as they will never rust again.
The Brake line that goes from the ABS unit, along the driver side frame rail alongside the fuel lines and EVAP tubing, and terminates to a rubber line that ultimately connects to the driver side of the rear axel is 1/4"
The Brake lines that go from the block on the rear axel to the calipers is 3/16"
You need to have an assortment of fittings if you go the DIY route as I remember using a few different sizes of fittings.
P.S. Copper brake lines are super easy to bend by hand, I didn't use any tools to form them into place. You will need to however get a brake line flaring tool kit but I picked one up for under $20 online. Watch a few YouTube videos and make sure you lubricate the line that gets flared and your are good to go!
I would suggest that if you live in a rust prone area that you don't put steel brake lines back on and upgrade to copper as they will never rust again.
The Brake line that goes from the ABS unit, along the driver side frame rail alongside the fuel lines and EVAP tubing, and terminates to a rubber line that ultimately connects to the driver side of the rear axel is 1/4"
The Brake lines that go from the block on the rear axel to the calipers is 3/16"
You need to have an assortment of fittings if you go the DIY route as I remember using a few different sizes of fittings.
P.S. Copper brake lines are super easy to bend by hand, I didn't use any tools to form them into place. You will need to however get a brake line flaring tool kit but I picked one up for under $20 online. Watch a few YouTube videos and make sure you lubricate the line that gets flared and your are good to go!
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