Crankcase Ventilation System Inspection for Buick LeSabre 2000

1. Turn OFF the ignition switch.



2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
3. Disconnect the electrical connector (2) from the manifold absolute pressure (MAP) sensor (1).



4. Remove the MAP sensor (1). Refer to Manifold Absolute Pressure Sensor Replacement .
5. Use a 16 mm socket to press the access cover (2) down and rotate 1/4 turn counterclockwise.
6. Remove the access cover.
7. Remove the PCV valve (3) and the O-ring (4) from the intake manifold.

1. Install the crankcase ventilation valve (3). Replace the PCV valve or the O-ring (4) if necessary.
2. Reposition the access cover (2).
3. Use a 16 mm socket to press the access cover (2) down and rotate 1/4 turn clockwise.
4. Install the MAP sensor. Refer to Manifold Absolute Pressure Sensor Replacement .



5. Connect the electrical connector (2) to the MAP sensor (1).
6. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .