* PCV Valve: This is the core component. It's a small valve that controls the flow of crankcase gases. Its location varies slightly depending on specific engine configuration but is generally found on the valve cover. It often has a hose connected to it, going to either the intake manifold or air cleaner housing (depending on the year and specific configuration). It will look like a small plastic or metal box with a hose barb on either side.
* Hoses: Several hoses are involved, connecting the valve cover(s) to the PCV valve and then from the PCV valve to the intake manifold or air intake. These hoses can become brittle, cracked, or disconnected over time, disrupting the system.
* Breather (or vent): This is an opening, often with a filter, on the valve cover that allows for air to enter the crankcase to replace the gases being vented. This could be a simple hole with no filter, or a small filtered tube.
* Intake Manifold: The crankcase gases are routed into the intake manifold to be burned in the combustion process.
To find your PCV valve:
1. Consult a repair manual: A Chilton's or Haynes repair manual specific to your 1997 Ford Explorer 5.0L will show you the exact location and visual appearance of the PCV valve and related components. This is the best approach.
2. Visual inspection: Carefully examine the valve covers. The PCV valve is usually mounted on one of them, often near a hose connection. Look for a small, somewhat square or rectangular component with hoses connected.
3. Follow the hoses: Start by looking at the valve cover(s). Follow the hoses leading away from them. They’ll likely lead to the PCV valve.
Important Considerations:
* A failing PCV system can lead to: excessive oil consumption, oil leaks, increased emissions, and even engine damage. Regular inspection is advised.
* Replacement: Replacing the PCV valve is relatively inexpensive and straightforward. However, inspect the hoses thoroughly, as cracked or deteriorated hoses can negate the benefits of a new valve. Replace them if necessary.
Without a visual reference, it's impossible to give a precise location, but the steps above should help you find it. Remember safety first - disconnect the negative battery terminal before working on any engine components.
