Vacuum Pump: Service and Repair

Power Brake Booster Vacuum Check Valve and Hose Replacement

Removal Procedure

1. Turn the ignition switch to the OFF position.

2. Apply and release the brake pedal several times until the pedal becomes firm to deplete the power vacuum brake booster vacuum reserve.

3. Remove the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement (LS9) Upper Intake Manifold Sight Shield ReplacementUpper Intake Manifold Sight Shield Replacement (w/o LS9) Upper Intake Manifold Sight Shield Replacement.





4. Disconnect the vacuum brake booster check valve and hose assembly (1) from the power vacuum brake booster.





5. Disconnect the vacuum brake booster vacuum hose (1) from the engine.

Installation Procedure





1. Connect the vacuum brake booster vacuum hose (1) to the engine.

A small amount of denatured alcohol may be used as a lubricant to ease installation, if necessary.





2. Connect the vacuum brake booster check valve and hose assembly (1) to the power vacuum brake booster.

A small amount of denatured alcohol may be used as a lubricant to ease installation, if necessary.

3. Install the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement (LS9) Upper Intake Manifold Sight Shield ReplacementUpper Intake Manifold Sight Shield Replacement (w/o LS9) Upper Intake Manifold Sight Shield Replacement.