Vacuum Hose and Check Valve

1. Disconnect the vacuum hose.

2. Inspect the hose for cuts, abrasions, and cracks.

3. Apply both vacuum and pressure on the engine side of the hose.

4. Verify that the air flows only toward the engine.

   NOTE: An arrow on the hose/ power brake booster check valve (2365) assembly indicates the correct orientation of hose installation.

5. If replacement is necessary, replace the hose and power brake booster check valve as an assembly.