[s-cars] ANN with major oil leak

[Joe Pizzimenti]

Lino,
That should only be a one way valve (crankcase vent to intake
manifold, not the other way around) or there wouldn't be a valve
there.

Just went through this on the Evo.  When the PCV diaphragm tears,
instead of the crankcase pressure going to the intake manifold, all
26psi of RS2 goodness (in your case) goes through that valve, into the
crankcase and not being content to stop there, it follows the path of
least resistance (hopefully the dipstick tube).

Replace PCV, problem solved.

Joe, no more Evo oil fountain, Pizzo


On Sun, 24 Oct 2004 22:15:06 -0400, Lino M. Valadas
<l.valadas at rogers.com> wrote:
> After a great day at Mosport Ontario today, I drove home with hardly any oil
> left in the crankcase. Of course I did not know it at the time, but decided
> to check my oil level on I got home and that's when I found out.
> 
> Futher investigation revealed a major oil leak from the crankcase
> ventilation plumbing.  The drivers side (North American car) of the engine
> and surounding areas were completely soaked and driping with fresh Mobil 1.
> Has anybode experience this?  Are my compressing rings going?  I had done a
> compression test recently on the car (93 S4 with 153K km) and all cylinders
> were good at 150 lbs/sq".
> 
> Also there is  some sort of valve between the crankcase and the head in the
> vent pipe.  Does anybody know what its function is? I checked it and it
> allows air to pass both ways.  Should it?   I have the Bentleys but there is
> no description nor reference to the crankcase ventilation system.
> 
> Any info would be appreciated.
> 
> BTW the car performed flawlessly at the track.  The BIRA system 3 was
> awesome.  I did not let the 20vt crowd down.
> 
> Cheers
> 
> Lino
> 
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