Beck/Arnley 045-0253 Pcv Valve

I'll admit after reading the negative reviews I did my own blow test and was concerned it wasn't a one way valve. After doing my own research, I found it's not a check valve, and only needs to close for high pressure situations like a backfire. I'll blame the manufacturer for not adding a paper note in the box explaining this. I'd also recommend anyone buy from the "used like new" section, its probably a return from a misinformed person.Here's one of the examples:One way to check whether a PCV valve is functioning is to remove it from the hose or tube and shake it. If you can hear a metallic rattling noise, it's likely in good working order. If you do not hear anything when you shake the valve, it is likely that it is no longer opening and closing like it should.No one indicated it should act like a check valve. This thing certainly rattles. And it's working in my NB2 Miata.Get a new gasket when you order this.

very good quality, easy to install, great product

worked well

Qualité laisse à désirer, fuite.

I had an oem one in my car and the valve cover started smoking. I put this one in just to see if that was the issue and it went right away. Crazy how this one worked over the OEM one but it is what it is.