How to Change a PCV Valve on a Chevy Impalaby Alibaster Smith
The positive crankcase ventilation valve (PCV valve) on a Chevy Impala is generally located on the engine block. The exact location may vary from year to year; however, it is generally located on the valve cover. The end of the PCV valve looks like a rubber plug. The valve recirculates exhaust gases that blow into the crankcase back into the engine for more complete burning. On the Impala, you will have to change this part after 100,000 miles of driving.
Locate the Impala's PCV valve. Pull the connecting hose off the end of the valve. It should pull straight off. On some model years, you may need to remove a retaining ring using a pair of pliers to work the ring off the end of the hose and then pull the hose off the valve.
Turn the PCV valve counterclockwise as though you were unscrewing a light bulb. The valve will come out of the engine relatively easy this way.
Install the new PCV valve as though your were screwing in a new light bulb. Tighten the valve until you feel resistance against the engine. Do not over-tighten the PCV valve.
Reconnect the PCV valve hose and replace the retaining ring if your Impala has one.