I have been misquoted - I was talking about the turbo engines and without the check valve, there would be up to a bar of positive pressure applied to the crank case, no doubt blowing oil out through the front and rear main seals, popping the dipstick out, not to mention the oil filler cap itself (although they are actually clipped down on the turbo engines) The turbo engines are vented much like the DeLorean engine, but via a check valve. Martin Dave Swingle wrote: >It's both. The check valve function is supposed to keep an engine >backfire fron blowing INTO the crankcase. Apparently PRV didn't worry >about that. > >Dave S > > >--- In dmcnews@xxxxxxxxxxxxxxx, "bitsyncmater" <david.mckeen@...> wrote: > > >>I think a PCV valve is not a check valve but a controlled volume >>(like an orifice). If you use to much vacuum flow you will never get >>your idle speed down to 750 RPM. (Just like other vacuum leaks) >> >> ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/