Where is the PCV valve on a 1990 cutlass supreme 3 1 engine?

The PCV valve on a 1990 Oldsmobile Cutlass Supreme with a 3.1L engine is typically located on the valve cover. It's a small, usually plastic, valve that's often capped with a hose going to the intake manifold. However, its exact position on the valve cover can vary slightly.

To locate it definitively, you should:

1. Consult a repair manual: A Haynes or Chilton manual specific to your year and engine will show a diagram with its exact location.

2. Look closely at the valve cover: The valve is usually easily visible; look for a small, capped fitting with a hose attached, often near the back of the valve cover.

3. Trace the PCV hose: Follow the hose leading from the valve cover toward the intake manifold; this will lead you to the valve.

Remember to be careful when working near the engine; it will be hot if recently run.