How to Change the PCV Valve on Ford Cars

by Contributing Writer; Updated June 12, 2017

The Ford car uses a PCV valve as part of its emissions control systems. PCV, which stands Ford car Positive Crankcase Ventilation, is a system by which the exhaust runs back through the combustion chamber to make sure any unburned fuel that escaped the chamber the first time is burned on the second pass. Over time, the valve can get gummed up and begin to stick closed. If this happens, you will need to replace it as soon as possible to ensure your Ford car continues to run smoothly.

Under The Hood:

 How to Change the PCV Valve on a 2004 Ford F150 5.4L

Open the hood of the F-150 and position yourself over the right side (as viewed when sitting in the vehicle) of the engine.

Remove the PCV valve from the right-side valve cover, by hand. Separate the PCV valve from the PCV valve tubing, by hand.

Insert a new PCV valve into the valve tubing. Install the new PCV valve into the right-side valve cover.

Items you will need

  • New PCV valve

 How to Change the PCV Valve in a 2004 Ford Taurus

Open the hood to the 2004 Ford Taurus and follow the air intake system where it meets the valve cover. The PCV valve is located on the backside of the engine.

Follow the air intake tube below the intake manifold. If the Taurus uses a heated PCV valve, disconnect the wire harness first.

Use the ring-tipped needle-nose pliers to turn the PCV valve counterclockwise and unseat it. Twist it while pulling upward to release it from its seated position.

Inspect the intake hose to ensure it's not dry rotted or cracked where the PCV valve plugs into it.

Insert the new PCV valve into the port and twist clockwise to secure it.

Replace the intake hose to the inlet of the PCV valve.

Connect the wire harness--if applicable--to the heated PCV valve.

Items you will need

  • Ring-tipped needle nose pliers

  • Replacement PCV valve

 How to Change the PCV Valve on My 2001 Ford 4.0L SOHC

Remove the beauty cover, using the appropriate sockets.

Feel along the back of the plastic intake manifold for two hoses attached to a connector. Remove the vacuum hoses from both sides of the T-shaped part of the PCV valve. The connector is tie-strapped into place. You can cut the tie strap with the dykes, though some mechanics just twist them to break the tie strap. Either way is acceptable. Twist the valve to remove it. Remove the tie strap.

Install the new PCV valve. Push the vacuum hoses onto each side of the T-shaped part of the valve. The hoses are force-fit, and will hold everything in place. You do not need to install another tie strap, unless you want to and can fit your hands behind the intake to get the strap in and around the PCV valve.

Reinstall the beauty cover and tighten the bolts snugly. Do not over-tighten the bolts, as you will crack the plastic.

Items you will need

  • Set of sockets

  • Pair of dykes

 How to Replace the PCV Valve on a Ford Focus

Locate the PCV valve, which is located on the driver's side of the engine block on a Ford Focus and looks like a plug or stopper. The exact location varies with the model. On the base model, it's located on the back side of the valve cover. On the ZX3 model, however, look to the right of the oil filler cap and then eight inches down on the side of the block.

Note the orientation of the valve, and then pull the connecting hose off the end of the valve. It should pull straight off.

Grab the end of the PCV valve with the pliers and twist the valve counterclockwise. You may have to twist fairly hard to remove it, but there is nothing else holding the valve in place.

Install the new PCV valve with the same orientation as the old valve. The valve simply "plugs" into the hole where the old one was located.

Attach the hose to the end of the PCV valve.

Start the engine and wait for the engine to heat up. When the engine is at normal operating temperature, place a rag over the hose connected to the PCV valve and gently squeeze the hose with a pair of pliers. If you hear a clicking sound when the hose is pinched off, then the valve is operating correctly.

Items you will need

  • Pliers Rag

 How to Replace the PCV Valve in an F-150

Open the hood and locate the crankcase hose. Depending on the year and engine configuration your F-150, you may need to use the flashlight and inspection mirror. The hose connects to the PCV valve, which plugs into the valve cover.

Grab the hose and pull it and the PCV valve away from the valve cover. Depending on the year and engine configuration your F-150, you may need to remove the air cleaner housing or other components to reach the hose and valve.

Pull the PCV valve out of the end of the crankcase hose and insert the new PCV valve.

Plug the new valve into the valve cover in place of the old valve. Reinstall anything you may have needed to remove in Step 2 and close the hood.

Items you will need

  • Flashlight (optional)

  • Inspection mirror (optional)