Pressure in the Valve Cover (16v)

[mraudi25@epix.net (MrAudi)]

some pressure is created by inevitable blow-by past the rings.
----- Original Message -----
From: "John Erickson" <hombre@elp.rr.com>
To: <scirocco-l@scirocco.org>
Sent: Wednesday, January 23, 2002 12:57 PM
Subject: Pressure in the Valve Cover (16v)


> I guess I just don't understand.  The engine compartment in my car was
> completely covered in oil when I bought it because a) the oil filler cap
> was leaking, and b) there was a big hole in the breather tube.   I have
> remedied both problems, but still get a little oil on the filler cap
> (new).  Every car I have ever owned had some way to relieve pressure in
the
> crankcase/valve train.  In most cases, it was some sort of PCV system.
The
> 16v doesn't have it.  It only has the breather tube connected to a small
> vacuum line and the air box.  Even with this set up, I do not understand
> why there is pressure in the valve cover.  The oil drain holes in the head
> should allow the pressure to be bled back to the crankcase and on to the
> air box.  I'm sure that the pressure buildup in the valve cover is also
why
> we have seal failures and oil in the distributor as well.  These appear to
> be fairly common problems so I don't think I've got anything else I need
to
> fix.  Can anyone elaborate on this?  Anyone come up with a solution?
>
> John
> 87 16v
> El Paso
>
>
>
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