Where is the pcv valve on a Mercury Sable - NOT DOHC engine and how to replace it?

The PCV valve location on a non-DOHC Mercury Sable varies slightly depending on the exact year and engine size (e.g., 3.0L V6, 3.8L V6). However, it's generally found on the valve cover, often near the back or side. It's a small, usually plastic, valve with a hose connected to it. It may look like a small cap or have a slight protrusion.

To find it, you should:

1. Consult your owner's manual: This is the best source for the exact location on your specific vehicle. The manual will usually have a diagram of the engine compartment.

2. Look at online repair manuals: Sites like Chilton and Haynes offer repair manuals specific to your year and model. These often have diagrams and detailed instructions.

3. Search online for images: A Google Images search for "[Your Year] Mercury Sable PCV Valve Location" might yield helpful pictures from other Sable owners.

How to Replace the PCV Valve:

Once you locate the valve:

1. Disconnect the hose(s): Carefully disconnect the hose(s) connected to the PCV valve. They usually just pull off, but be gentle to avoid damaging them.

2. Remove the valve: The PCV valve often just pulls straight out. Sometimes, a slight twist or gentle prying might be necessary. Be careful not to drop it into the engine bay.

3. Inspect the valve: Check the valve for any signs of clogging or damage. If it's stuck or the diaphragm is torn, it needs replacement.

4. Install the new valve: Insert the new PCV valve into the same location, ensuring it sits securely.

5. Reconnect the hose(s): Carefully reconnect the hose(s) to the new PCV valve.

6. Check for leaks: After reconnecting everything, start the engine and check for any leaks around the PCV valve and hose connections.

Important Notes:

* Safety First: Always disconnect the negative battery terminal before starting any work on your vehicle's engine.

* Use the correct replacement: Ensure you purchase a PCV valve that's specifically designed for your Mercury Sable's year and engine. Auto parts stores can help you find the right one if you provide them with your VIN.

* Engine Cleaning (Optional): While replacing the PCV valve, consider cleaning the area around the valve cover and intake manifold with a degreaser. This can improve overall engine performance.

If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Replacing a PCV valve is generally a simple task, but incorrect installation can lead to further engine problems.