Rear brake hose is bad

Tiny
GP CHICK
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 131,000 MILES
Where the rear brake pads and rotors are only a little over a year old. Upon a routine check for a spongy bake pedal, the test drive mechanic came back and informed me that the rear brake hose is bad.
Sunday, October 21st, 2012 AT 11:22 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

When the hoses get older, they can dry rot and crack creating a leak. This can cause brake failure if the hose totally breaks. Here are videos to help you make your own line or replace the brake flex hose.

https://youtu.be/sO43p4ZFUiM

and

https://youtu.be/1Prs_coIuCg

The process is the same in most cases.

Here are the directions specific to your vehicle for replacement. The attached pics correlate with the directions.

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.

1. Raise and suitably support the vehicle.
2. Remove the front tire and wheel assembly.
3. Clean all dirt and foreign material from the brake hoses and brake pipe fitting.

4. Important: Install a rubber cap or plug to the exposed brake pipe fitting end to prevent brake fluid loss and contamination.

Use a backup wrench on the hose fitting, disconnect the brake pipe fitting from the brake hose, then cap or plug the brake pipe fitting end.Do not bend the brake pipe or the bracket.
5. Remove the brake hose retaining clip from the hose mounting bracket.
6. Remove the hose from the bracket.
7. Remove the brake hose to caliper bolt (4) from the brake caliper (2).
8. Remove the brake hose (5) from the brake caliper (2).
9. Remove and discard the two copper brake hose gaskets (3). These gaskets may be stuck to the brake caliper and/or the brake hose end.

Installation Procedure

1. Important: Install NEW copper brake hose gaskets (3).

Assemble the NEW copper brake hose gaskets (3), and the brake hose bolt (4) to the brake hose.

2. Notice: Refer to Fastener Notice in Service Precautions.

Install the brake hose to caliper bolt to the brake caliper.
Tighten the brake hose to brake caliper bolt to 54 Nm (40 ft. lbs.).
3. With the weight of the vehicle on the suspension, install the brake hose into the bracket.There should not be any kinks in the hose.Align the hose fitting with the notch in the bracket. Use the hose paint stripe as a visual aid.
4. Install the retainer onto the hose fitting at the bracket.
5. Remove the rubber cap or plug from the exposed brake pipe fitting end.

6. Connect the brake pipe fitting to the brake hose:
Use a backup wrench on the hose fitting.
Do not bend the bracket or pipe.
Tighten the brake pipe fitting to 18 Nm (13 ft. lbs.).
7. Install the front tire and wheel assembly.
8. Ensure that the hose does not make contact with any part of the suspension. Check the hose in extreme right and extreme left turn conditions. If the hose makes contact, remove the hose and correct the condition.
9. Bleed the hydraulic brake system.
10. Lower the vehicle.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, March 10th, 2021 AT 9:08 PM

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