1997 Ford Taurus Change PCV Valve
The PCV valve, also known as the Positive Crankcase Ventilation Valve, is designed to release the excess pressure from the engine known as "blow by" pressure. This excess "blow by" pressure is pressure that has escaped from inside of the engine and traveled into the valve covers. Once that the pressure reaches a certain level, the PCV valve will open and release the pressure from the valve cover.
 Tools Used
 Change PCV Valve
- Open the hood on the 1997 Ford Taurus and lock the hood in place. Make sure that the engine is completely cooled off before working around the engine.
- Locate the PCV valve. The PCV valve on the 1997 Ford Taurus is located in the middle of the rear valve cover. The PCV valve is a L-shaped part that is pushed into a rubber grommet in the middle of the valve cover. The other end of the PCV valve is attached to the 1/2-inch pressure-release hose on the rear of the engine.
- Pull the PCV valve out of the rubber grommet on the rear valve cover with your hands by pulling straight out on the PCV valve..
- Remove the PCV valve from the 1/2-inch pressure-release hose. If the PCV valve is stuck inside of the hose, use a pair of pliers to twist and rotate the PCV valve while pulling it out.
- Slide the small end of the new PCV valve into the 1/2-inch pressure-release hose.
- Push the PCV valve back into the rubber grommet in the middle of the valve cover. Make sure that the PCV valve is sitting all the way down inside of the rubber grommet and that the pressure-release hose is all the way up on the small end of the PCV valve. Close the hood. Job complete.
 Tips & Warnings
- To test the PCV valve to make sure that it is working, shake the PCV valve back and forth. If the PCV valve makes a rattling noise, then it is working. This means that the small ball inside of the PCV valve is free and can release pressure.
- Serious burns can result from working on a hot engine.