1. Disconnect the brake booster vacuum check valve (1) from the brake booster.
2. If the vacuum check valve (1) needs to be separated from the vacuum hose (3), release and reposition the clamp (2) on the vacuum hose (3) and remove the check valve (1) from the hose (3).
3. If replacing the vacuum check valve (1), remove the grommet (4) from the brake booster and discard the grommet.



4. If vacuum hose removal is necessary, and if the vehicle is equipped w/ RPO M75, release the vacuum hose from the retaining clip (1).
5. If removing the vacuum hose, release the vacuum hose connector retainer, then disconnect the connector from the vacuum port on the engine intake manifold.

Take note of the vacuum hose routing, then remove the vacuum hose from the vehicle.

Important: A small amount of denatured alcohol can be used as an assembly aid when installing the vacuum check valve and/or grommet. Do NOT use soap.

1. If the vacuum hose was removed, install the vacuum hose into position on the vehicle, as noted prior to removal.
2. If the vacuum hose was removed, connect the vacuum hose connector to the vacuum port on the intake manifold. Press the connector retainer down firmly to secure the connector to the port.
3. If the vacuum hose was removed, and if the vehicle is equipped w/ RPO M75, secure the vacuum hose to the retaining clip (1).



4. If the vacuum check valve (1) is being replaced, install a NEW grommet (4) to the brake booster.
5. If the vacuum check valve (1) was separated from the vacuum hose (3), install the check valve (1) to the vacuum hose (3). Install and secure the clamp (2) into position on the hose (3).
6. Connect the brake booster vacuum check valve (1) to the brake booster.