Date: Fri, 14 Jan 2000 12:26:49 -0800
From: "wgm" <>
Subject: Re: The dreaded turbo smoke? Classic 900

back in the old days, the very first piece of emissions equipment was a pvc valve. It regulated the blow by gasses from the crankcase into the base of the carb, where they were recirulated thru the engine. It was mostly oil fumes, and a little burned hydrocarbons-less your motor was on its way out. This device needed an air supply to the crankcase, as some were so efficent they would suck oil from the engine.- To avoid contamination of the engine oil from dirty air they sourced the air from in side the air cleaner. A poorly working (or designed)pvc valve would fill your air cleaner with oil. If Saab has this system(couldn't find it in the book)- you may want to hook it back up and get it working again. John" <> wrote in message > The "overflow" pipe to which you refer is actualy the vent pipe for the > combustion gases that get past the piston rings - you should not remove it > from the air cleaner as its part of the polution control - depending on > which State / Country you are in this is highly illegal. BTW the later > 16v's vented this upstream of the filter. > > Johann

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