Town Car V8-4.6L VIN W (1997)
Vacuum Brake Booster Check Valve: Testing and Inspection
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.
5. If replacement is necessary, replace the hose and power brake booster check valve as an assembly.
NOTE: An arrow on the hose and power brake booster check valve assembly indicates the correct orientation of hose installation.
