For 1990-2009 cars

Important:

• | Do not use lubricated compressed air on the brake parts. This action may result in damage to the rubber parts.

• | Replace all of the components that are included in the repair kits used to service this booster.

• | Lubricate the rubber parts in order to ease assembly. Use silicone grease.

• | If you remove or disconnect any hydraulic component, bleed all or part of the brake system.

• | The specified torque values are for dry, non-lubricated fasteners.

This vacuum booster is a tandem vacuum suspended unit. When the service brakes are released, the tandem vacuum booster operates with vacuum on both sides of the diaphragm. When the brakes are applied, air at atmospheric pressure is admitted to one side of each diaphragm. This draws air from the booster through the vacuum check valve to the vacuum source. The internal components of this booster cannot be serviced. Do not unstake and separate the housing. Separating the housing will cause permanent deformation of the booster and prevent the booster from holding the proper volume.

### Routing

Brake booster vacuum hose routing in the 3800 V6 series engine.

Power brake booster vacuum hose routing in the 5.7L V8 series engine.