Date: Wed, 09 Mar 2005 22:13:31 GMT
From: "Dexter J" <>
Subject: Re: Oil Catch Tank

Salutations: On Wed, 09 Mar 2005 21:48:25 GMT, Paul Halliday <> wrote: > in article MYEXd.209$, chris at werwenospamcom > wrote on 09/03/2005 15:52: > >> >> "Robert" <> wrote in message >> news:qpqXd.132043$ >>> Paul Halliday wrote: >>>> I'm looking for an oil catch tank solution for the crankcase >>>> ventilation >>>> system on my 1989 900 T8. I'm getting oil dripping down onto the fuel >>>> metering plate and into the airbox. I'd like to (a) stop it and (b) >>>> get a >>>> handle on how much oil ... I don't seem to need to top up at all >>>> really; >>>> maybe a "gloop" now and again. >>> ----8<----cut--- >>> >>> Paul, I've had oil drops come from the valve cover ventilation hose to >>> the >>> air filter canister and clog the filter on my cars. But this was on >>> single >>> carb 900 and 99 cars (had one of each). >>> >> >> I think nearly all of my 8v 99/900's carb or injection had some small >> amount >> of oil in the airbox. >> >> suppose you could vent to atmosphere.... > > Yeah ... But I'm getting oil actually on the fuel metering plate and I'm > not > sure that's a "good thing" :( > > I've actually just this minute tried a VTA test. I blocked up the vac > line > at the intake manifold and the end of the hose that comes from the top of > the crankcase. I then stuffed a breather filter into the hole and .... It > stalled ... > > I adjusted the throttle stop screw and it seemed to idle okay. What > happens > then? Is that okay? Can anyone see any problems with that? > > Ideally, I'd like to put a catch tank inline into the system. So, idiot > questions: > > 1. What does the vac line *actually* do? Yes, I know it sucks at idle and > prevents boost entering the crankcase by using a one-way valve ... But > what > does it actually do? > > 2. Do I need it? Can I just stump up the basic idle and have done with > that > part of the system? If so ... Do I need to do the catch tank > installation, > or is venting to atmosphere okay? I know there's a performance gain > associated with doing that, but I have a road car not a track car! > > Paul > > 1989 900 Turbo S > Hey brother Paul - I'm afraid I don't have the answers to the particular questions. However I wanted to let you know that I had what I thought was a similar problem on an old 99 engine which turned out not to be vent oil at all - but simply condensing fuel varnish weeping down the manifold walls when it got damp enough. While the system required an annual wipe and clean when I did the filter - my wrench at the time said I shouldn't be bugged too deeply by it. -- Radio Free Dexterdyne Top Tune o'be-do-da-day Thomas Dolby - Hyperactive all tunes - no cookies no subscription no weather no ads no news no phone in no sign up required - all the Time Dexter J's fab SAAB 900 for sale:

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