Where is the PVC Valve on a 1997 Chevrolet S-10 4-cylinder?

The Positive Crankcase Ventilation (PCV) valve location on a 1997 Chevrolet S-10 4-cylinder engine varies slightly depending on the specific engine (2.2L or 2.8L) and whether it's a TBI (throttle body injection) or MPI (multi-port injection) system. However, it's generally located on or near the valve cover.

To be certain, you should:

1. Consult a repair manual: A Haynes or Chilton manual specific to your 1997 Chevy S-10 4-cylinder will show you a diagram and the precise location. This is the most reliable method.

2. Look on the valve cover: The PCV valve is usually a small, plastic or metal valve with a hose connected to it. It might be easily visible, or it might be tucked away somewhat, but it's always in the vicinity of the valve cover.

3. Trace the hose: If you can locate a hose going from the valve cover to the intake manifold (or a similar location on the engine), follow that hose; it should lead to the PCV valve.

Without knowing the exact engine code, providing a more precise location is impossible. Using a repair manual is strongly recommended for accurate identification.