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) > > --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@> wrote: > > > > > > Just thought I'd share how the later Renault Turbo engines are set > up. > > ------------------------------------ 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/