[urq] Too much Crankcase ventalation?

Huw Powell audi at humanspeakers.com
Tue Sep 4 18:46:24 EDT 2007

> Alright - now that it is mentioned.  How to "Catch Can"?   And why?

A place for oil to deposit after leaving the crankcase to keep it out of 
the air, I would imagine.  Done right it might even get drawn back into 
the intake and burned at various engine conditions (hence the PCV valve).

> I don't have my charcoal filter setup in the line yet - thought this was for
> fuel vapor recovery and wondering why I would need it with a speed density EFI
> system.  I left the plumbing lines ready to use it, but was considering just
> deleting it.

Yes, that's what it's for - but isn't it fed by the fuel tank vent line? 
  Which needs to go somewhere "safe"?

> Wondering if it would be a problem just to close off the cam cover completely
> for now?

I think you need a place for crankcase pressure (from heated air, if 
nothing else, and of course blow-by) to go.

Huw Powell



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