How to remove a brake line on 2008 Pontiac Grand Prix

Pontiac Grand Prix

I got a leak in my brake line. I’m wondering how do I remove the brake line that goes from the master cylinder to the front passenger caliper.

Simple version, unscrew the brake line from the the caliper and master cylinder. Remove any mounting along the brake line. Pull it out being careful not to bend it as you will want to use it as a guide to bend the replacement brake line.

Brake Line R&R

Caution: Always use double walled steel brake pipe when replacing brake pipes. The use of any other pipe is not recommended and may cause brake system failure. Carefully route and retain replacement brake pipes. Always use the correct fasteners and the original location for replacement brake pipes. Failure to properly route and retain brake pipes may cause damage to the brake pipes and cause brake system failure.
If sectioning brake pipe, use replacement pipe of the same type and outside diameter. Use fittings of the appropriate size and type. Only create flares of the same type or design as originally equipped on the vehicle.
Ensure that the brake pipe end to be flared is cut at a square, 90 degree angle to the pipe length.
1.Inspect the section of brake pipe to be replaced.
2.Release the brake pipe to be replaced from the retainers, as required.
3.Select an appropriate location to section the brake pipe, if necessary.
a.Allow adequate clearance in order to maneuver the J 45405.
b.Avoid sectioning the brake pipe at bends or mounting points.
4.Using a string or wire, measure the length of the pipe to be replaced including all pipe bends.
5.Add to the measurement taken the appropriate additional length required for each flare to be created.
6.Using the pipe cutter included in the J 45405, carefully cut the brake pipe squarely to the measured length.
7.Remove the sectioned brake pipe from the vehicle.
8.Select the appropriate size of brake pipe and tube nuts, as necessary. The brake pipe outside diameter determines brake pipe size.
9.Strip the nylon coating from the brake pipe ends to be flared, if necessary.
10.Chamfer the inside and outside diameter of the pipe with the de-burring tool included in the J 45405.
11.Install the tube nuts on the brake pipe, noting their orientation.
12.Clean the brake pipe and the J 45405 of lubricant, contaminants, and debris.
13.Loosen the die clamping screw of the J 45405.
14.Select the corresponding die set and install the die halves into the die cage with the full, flat face of one die facing the clamping screw, and the counterbores of both dies facing the forming ram.
15.Place the flat face of an unused die (1) against the die halves in the clamping cage and hold firmly against the counterbored face of the dies, Fig. 1.
16.Insert the prepared end of the pipe to be flared through the back of the dies until the pipe is seated against the flat surface of the unused die.
17.Remove the unused die (1), Fig. 1.
18.Ensure that the rear of both dies are seated firmly against the enclosed end of the die cage.
19.Firmly hand tighten the clamping screw (2) against the dies, Fig. 1.
20.Select the appropriate forming mandrel and place into the forming ram.
21.Rotate the hydraulic fluid control valve clockwise to the closed position.
22.Rotate the body of the J 45405 until it bottoms against the die cage.
23.While guiding the forming mandrel into the exposed end of pipe to be flared, operate the lever of the J 45405 until the forming mandrel bottoms against the clamping dies.
24.Rotate the hydraulic fluid control valve counterclockwise to the open position to allow the hydraulic forming ram to retract.
25.Loosen the die clamping screw and remove the dies and pipe.
26.If necessary, lightly tap the dies until the die halves separate.
27.Inspect the brake pipe flare for correct shape and diameter (a), Fig. 2.
28.If necessary, using the removed section of pipe as a template, shape the new pipe with a suitable brake pipe bending tool.
29.Install the pipe to the vehicle with the appropriate brake pipe unions as required.
30.If previously released, secure the brake pipe to the retainers.
31.Bleed the hydraulic brake system.
32.With the aid of an assistant, inspect the brake pipe flares for leaks by starting the engine and applying the brakes.
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