Where is the PVC valve on a 1991 Buick century 3300 motor?

The Positive Crankcase Ventilation (PCV) valve on a 1991 Buick Century with a 3.3L V6 engine is typically located on the valve cover. It's often a small, plastic or metal valve with a hose attached to it. The hose will run to either the intake manifold or air cleaner housing.

However, the exact location on the valve cover can vary slightly depending on the specific engine configuration. The best way to locate it is to:

1. Consult a repair manual: A Chilton's or Haynes repair manual specific to your 1991 Buick Century will have diagrams showing the exact location of the PCV valve.

2. Look for a hose: Start by tracing the hose that vents from the valve cover. This hose will lead directly to the PCV valve.

3. Examine the valve cover closely: The PCV valve is usually relatively easy to spot once you know what to look for. It may be near the back or side of the valve cover.

Remember to be careful when working near the engine; it might be hot.