Can someone explain the function PCV
Thread Starter
Heel & Toe
Joined: Nov 2018
Posts: 22
Likes: 7
Can someone explain the function PCV
My C7, due to its year of manufacture, still has two of these "valves" that can be easily removed and tested, if you know how they're supposed to work 🤪.
The flow should be from the crankcase towards the intake. The valve "rattles," I cleaned it with brake cleaner, and there's almost no visible oil residue. In its installed position (valve opening angled downwards), the valve can be blown through from both sides. When I remove the valve and hold it with the opening facing upwards, the valve closes when blowing towards the crankcase, but that's not how the valves are installed. I bought both valves (in my case, they're the complete hoses with the valves) new, and it's exactly the same. As I understand it, the PCV valves cannot function as valves in their installed position. Could someone explain this to me?
The flow should be from the crankcase towards the intake. The valve "rattles," I cleaned it with brake cleaner, and there's almost no visible oil residue. In its installed position (valve opening angled downwards), the valve can be blown through from both sides. When I remove the valve and hold it with the opening facing upwards, the valve closes when blowing towards the crankcase, but that's not how the valves are installed. I bought both valves (in my case, they're the complete hoses with the valves) new, and it's exactly the same. As I understand it, the PCV valves cannot function as valves in their installed position. Could someone explain this to me?
