GM & GMC Full Size Truck Rusted Out Brake Line R&R Videos

mrrsm

Original poster
Lifetime VIP Donor
Supporting Donor
Member
Oct 22, 2015
7,989
Tampa Bay Area
Video Tips & Tricks for the R&R of Brake Lines on a 2005 GMC Yukon:


Video information on the R&R of Totally Rusted Out Brake lines on a 2005 Chevrolet Avalanche:


Working Stainless Steel Lines in place can become One BIG PITA... but seeing the problems that "Rust Belt" Road Salt, Mud and Snow Sloshing all over Truck Under-Carriages leaves behind on the OEM Mild Steel Brake Lines makes one stop and think about preferring S/S over the OEM lines for such difficult R&Rs... Hands Down.
 

gmcman

Member
Dec 12, 2011
4,659
Are there any tips and tricks to breaking the brake line loose from the nut without twisting the line?

Been waiting to replace my front brake hoses but cannot get the line to keep from twisting at this point here

Screenshot_20200614-084436_Gallery.jpg

Tried soaking with penetrating oil, a little heat, repeat, soaked for a week, heat, just not breaking free.

I can turn the nut, just cannot keep the line from twisting.



.
 

mrrsm

Original poster
Lifetime VIP Donor
Supporting Donor
Member
Oct 22, 2015
7,989
Tampa Bay Area
If you have prior experiences making Double Flares on Steel Tubing and can get enough room around that Wheel Well area to work... Consider just snipping off the Brake Line as close to the Brake Caliper In-Feed as possible and Clean Up & Re-Assemble and Re-Flare the Line:

But first... this preparation is required:

(1) Obtain a few Quarts of Dot-3 Brake Fluid
(2) Use Metal 'End Cutters' and a Quality Brake Line Flare Kit & Devise the means to Plug the Line.
(3) Clean up or Replace the GM OEM Compression Fitting (SLIDE over the Line FIRST, then FLARE).
(4) Replacement Pair of Pure Copper Brake Line Washers for the Banjo Fitting-Hose.
(5) Three Piece Flare Junction Kit to connect an intermediate 'Patch" of Brake Line as needed.
(6) Coil of OEM OD Nickel-Copper Brake Line (NICCOP) Practice making Flares on THIS Stuff FIRST!
 
  • Like
Reactions: gmcman

Mooseman

Moderator
Dec 4, 2011
25,671
Ottawa, ON
The only thing that ever really worked for me was heat from an oxy torch on the nut to the point that the rubber hose explodes out of the metal fitting. However, be careful to not apply direct heat to the metal line as you could burn through it but that can happen anyway if it's heavily corroded.
 
  • Like
Reactions: gmcman

xavierny25

Member
Mar 16, 2014
6,350
Staten Island, N.Y
@gmcman the way I did it and it worked on both the Envoy and tbss is crack it loose like you already have, disconnect the line from the caliper. Then remove the bolt holding the flex line to the frame and instead of trying get the fitting off turn the block off the fitting. Make sure to clean the fitting really well after and see if you can get it to turn freely if not then do those steps backwards. Get the block turned onto the fitting. Once it's close to it tightest position install it back to the frame with its bolt and then give the fitting its last torque down.
 
  • Like
Reactions: mrrsm

gmcman

Member
Dec 12, 2011
4,659
Then remove the bolt holding the flex line to the frame and instead of trying get the fitting off turn the block off the fitting

You know.....I can generally figure ways around things, and come up with a work around...but embarrassingly enough....I didn't think of this...thanks! I'll give it a try.

Made me think of this.

Includes bad language.

 
  • Like
Reactions: xavierny25

xavierny25

Member
Mar 16, 2014
6,350
Staten Island, N.Y
You know.....I can generally figure ways around things, and come up with a work around...but embarrassingly enough....I didn't think of this...thanks! I'll give it a try.

Made me think of this.

Includes bad language.


Lol.., hey man if it works for you like it did for me maybe the higher-ups can post it up as a FAQ and save ppl alot of time and money on replacing or repairing those hard lines.
 
  • Like
Reactions: Mooseman

Mooseman

Moderator
Dec 4, 2011
25,671
Ottawa, ON
You know what, thinking back on my youth (and that's a long time ago!), I used to do that too.

I'll be adding this to the FAQ :2thumbsup:
 
  • Haha
Reactions: xavierny25

Forum Statistics

Threads
23,490
Posts
639,919
Members
18,723
Latest member
RonaldRedd1961

Members Online