tomwu

Hi guys,
One side of valve cover gasket gone and I suspect the PCV valve could be faulty as well.
Yesterday I took it off, p/n 077103245B. Opened it and cleaned it with engine degreaser. rubber looks good but I kind of don't understand how it should be working. With the spring inside, I suppose rubber or some parts needs be moving to control block or open...
Anyhow I tried blow both pipe ends and all goes through. Not sure if this is what I should expect.

Cheers
Tom

Brozee

Cleaned mine a week ago. Pain in the butt to get it separated. Anywho that's all you do. Same happened with mine. If it goes bad, you'll hear a high pitch whining noise. Not sure what exactly goes bad in it, I believe it just becomes clogged.

tomwu

thanks.

I mean I'm suppose the valve should be something like closed on one direction, and need some pressure to open? Just I don't get any ideas how it should work and how to perform a quick test.

Some other pcv valve that can be tested by just rattle to hear some noise. But this one, I've got no ideas.

MP4.2+6.0

When in doubt, replace. Unfortunately among the world's most expensive PCV valves. Typical over engineered Swiss watch think from Art in Engineering for a part with a very basic function. It is what it is though as far as owners' need to live with it. To me, not worth fooling with if any doubts--even having taken them apart (on way to throwing away) along with hundreds of other Audi parts/assemblies over the decades. And in a nightmare scenario if it fails and sticks closed with motor over pressurized it can cause seal failures that can turn into like 100 x the cost of the PCV valve. Step one of that nightmare usually starts with, "remove engine."

Net, I prefer to R&R Art's overdone PCV valve and solve any likely or even suspected issue rather than either Fix it Again (and again...) Tony or even low probability risk taking.

tomwu

Pardon my English, R&R is remove & replace?

I'll also replace the valve cover gasket. That shouldn't need to 'remove engine', right?

MP4.2+6.0

Yes, R&R is common abbreviation for remove and replace. Valve cover gasket done w/ motor in place. Screws on lower back corner area are hard to access on many motors. Search for posts if you need more specifics there.