GM 88967236
Brake Booster

The first step in vacuum Brake Booster replacement is to put together j 22805-b (Brake Booster Holder). First remove the left insulator cover and then take out the vacuum Brake Booster Pushrod retaining clip along with the Pushrod from the Brake Pedal setup. Set the master cylinder aside safely by taking it off its connection to the booster without disconnecting brake pipes if needed. Once you access the vacuum Brake Booster you can open its locking tab by taking off the air inlet grille panel. Drain coolant from the surge tank inlet hose but leave it attached before removing its tank bolts. Turn the coolant surge tank bolts loose and move it aside before reconnecting the inlet tube to avoid coolant leakage. You must attach the j 22805-b device through the master cylinder retaining nuts to the vacuum Brake Booster check valve. Deactivate the locking tab on the cowl using a flat-blade tool then remove the booster with a ratchet on j 22805-b while turning it counterclockwise. You need to raise the vacuum Brake Booster from its cowl mounting flange and support it before pushing the foam filter forward to get to the retaining clip. Raise the taller edge of the retaining clip upwards to take out the vacuum Brake Booster Pushrod from the unit. Install the booster without damaging its internal parts and the ledge locking system. Push the vacuum Brake Booster onto the Pushrod and keep pushing until the retaining clip engages its position. Rotate the booster clockwise to connect it before using the j 22805-b on the ratchet without a flat blade. Press the booster into place until the locking feature reaches total activation. Reconnect the vacuum hose and check valve assembly after you take off the j 22805-b and put back the coolant surge tank. Place the vacuum Brake Booster Pushrod into its slot and rotate it counterclockwise to install the retaining clip on top. Next, put on the air inlet grille panel as well as integrate the master cylinder, cross vehicle brace (if needed), and left closeout/insulator panel.

To service the Brake Booster start by obtaining the Brake Booster holder tool j 22805-b. Remove the left closeout/insulator first before extracting the vacuum Brake Booster Pushrod retaining clip and Pushrod with their anchors attached to the Brake Pedal unit without detaching brake pipes from the master cylinder. Put the master cylinder to one side after taking it off from the vacuum Brake Booster. Reach the booster locking tab under the air inlet grille panel and disconnect the coolant surge tank vacuum line from its tank. Secure the coolant surge tank outside the work area after removing its bolts while keeping its inlet pipe connected. Set up the Brake Booster holder with part number j 22805-b on the vacuum Brake Booster and fix it through the master cylinder retaining nuts. Use a flat-bladed tool to push down the locking tab as you turn the booster counterclockwise with a ratchet on the Brake Booster holder (J 22805-B). Gently take the vacuum Brake Booster off its cowl mounting position while providing it support. Insert the foam filter from the front of the booster to reach the retaining clip. Lift the clip's long leg to extract the Pushrod. Set up installation only when all internal parts are present and locking plates show no damage. Feed the Pushrod inside the vacuum Brake Booster while placing its long retainer clip leg into the machine-made groove. Insert the booster in a counterclockwise direction towards positioning and tighten it clockwise while using a ratchet on the Brake Booster holder until the locking tab connects. Take off Brake Booster holder j 22805-b then affix the new vacuum tube and check valve system while placing back the coolant surge tank. Conclude by placing the air inlet grille panel and adding all remaining parts including the master cylinder, Pushrod, retaining clip, and left insulator panel.

Reinstall the cross vehicle brace, followed by the vacuum brake booster pushrod to the brake pedal assembly and the retaining clip, and finally, the left closeout/insulator panel.

Connect the vacuum hose and the vacuum brake booster check valve to the vacuum brake booster.

Install the vacuum brake booster to the pushrod, ensuring the long leg of the retainer clip is in the machined groove.

Disconnect the vacuum brake booster check valve.