Replacing the PCV in a V8 Vantage
The positive crankcase ventilation (PCV) valve is a small but incredibly important part of your engine. It’s job is to vent off excess pressure from inside the engine’s crankcase. Without it, pressure would build up inside the engine casing and could lead to catastrophic damage.
Although it’s a rarely-discussed part of your engine, it’s actually something of a maintenance item for the V8 Vantage. The PCV may need to be replaced as often as every 40,000 miles depending on climate and driving conditions. For example, if you live in Florida and drive like an ass (uh, so… me) then it may need to be replaced that often. If live up north and drive like a civilized human, your PCV can last much, much longer.
A bad PCV often emits a buzzing sound when your engine is idling. It’s not guaranteed it’ll buzz when bad, but it’s an easy diagnosis if you hear a buzz. Just push down on the center of the PCV with your finger - if the buzzing changes or stops, you know it’s the PCV causing the buzz and the PCV needs to be replaced.
DISCLAIMER: As always, follow all safety protocols. Don't undertake this task if you aren't comfortable with it and fully understand it. You are ultimately responsible for anything you do. Neither Redpants, LLC or myself is responsible or liable for anything that may occur.
New PCV valve
About 15 minutes
Before You Begin
The PCV valve is easy to find: it’s the plastic assembly with the round, flat top next to the intake inlet. In the pic below, you can see that I have one of my catch can kits on the car. The hoses and catch can replace the OEM plastic hose that would otherwise be there.
Disconnect the hose that sits on top of the PCV valve and the hose that connects into the side of the PCV valve. I’ve circled the connectors for each hose in the picture below.
Use the ratchet and 8mm socket to remove the two bolts that hold the PCV valve in place. They’re circled in the pic below.
Pull up on the PCV valve to remove it from the engine. There’s an o-ring that’s holding it in place on the underside, so it may help to twist the PCV valve while pulling up on it. Be careful that it may ‘pop’ loose quickly!
Install your new PCV valve by reversing the steps above.