Master Cylinder Replacement

Master Cylinder Replacement

Removal Procedure





1. Disconnect the electrical connector from the brake fluid level sensor.
2. If you are performing repairs on a 3.4L, non ABS Impala, it is necessary to remove the bracket (1) from the master cylinder.
3. Disconnect the brake pipes from the master cylinder.

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

4. Plug the open brake pipe ends.





5. Remove master cylinder mounting nuts.
6. Remove the master cylinder from the vehicle.
7. Drain the master cylinder reservoir of all brake fluid.

Installation Procedure





1. Bench bleed the master cylinder.
2. Install the master cylinder to the vacuum brake booster.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the master cylinder mounting nuts.
^ Tighten the master cylinder mounting nuts to 25 Nm (18 ft. lbs.).
4. Remove the plugs from the brake pipes
5. Connect the brake pipes to the master cylinder.
^ Tighten the brake pipe fittings at the master cylinder to 15 Nm (11 ft. lbs.).





6. If you are performing repairs on a 3.4L, non ABS Impala, it is necessary to install the bracket (1) to the master cylinder.
7. Connect the electrical connector to the brake fluid level sensor.
8. Bleed the brake system.