oil seporater for crankcase breather

[Brett Dikeman]

David Glubrecht wrote:

>
> I know the seporater is built into the valve cover on most vehicles 
> including most VW Audi's, however I do not see a breather hose on my 
> 90 90 20v.
> Is it built in to the metal hose where the breather hooks to the 
> block, or in the metal piece pressed into the block?

Some VWs had a plastic box with squiggly bits for oil vapor to collect/condense on, but no Audi model that I know of has one built-in, save racers/rally cars; Scott Justasson mentioned a car he crewed(crews?) for came with an 'official' Audi Sport air/oil separator.

Most cars have a copper squiggle in the upper part of the tube that is referred to as a flame arrestor in the parts catalog and Bentley, although I don't think anyone has ever figured out how exactly one would get flame near there..it'd take a serious backfire...

If anyone knows of a true separator, I'm all ears- most of the stuff available consists of catch cans, which aren't the same thing- and worse, vent to the atmosphere, which is very bad for the environment (not to mention, makes you fail emissions AND makes a mess of the engine compartment).  A separator would be a blessing on the turbo cars as they tend to blow enough oil out the breather system to gum up the ISV, coat the intercooler, cause various rubber intake hoses to fail prematurely, etc.

Best I've been able to find was one designed for airplanes, complete with return line for returning oil to the crank...but they were extremely unresponsive regarding automotive applications, and the orientation was completely wrong (inlet up top, exit down below; opposite of what's needed for the Audi breather system layout.

Brett

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