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Date: Thu, 19 Apr 2007 20:17:17 GMT
From: Paul Halliday <pjghnospamyonder.co.uk>
Subject: Re: Where does small baby hose from top of Bypass valve go do??


in article f05mka$6ho$1nospam6.zwoll1.ov.home.nl, MH at nonospamo wrote on 18/04/2007 19:00: >> In fact, on the later 9-3 Viggen model, the valve is actually fitted from the >> factory "the wrong way round". > > This is how it's placed in our '95 900SE; > http://upload.wikimedia.org/wikipedia/commons/6/64/SaabB204engine.jpg > > I do not know if that is the 'wrong' way around or not. That is in what is called the "correct" orientation. Notice how the valve is orientated so the internal bung and spring actuate perpendicular to the charge air. The smaller vac hose rapidly sucks the top of the valve when the pressure drops out of boost. On some later SAABs (and other turbo cars), the valve is placed the other way around, so the charge air cannot technically act upon the underside of the internal bung. The valve is purely actuated by vacuum. Paul 1989 900 Turbo S http://saab.go.dyndns.org/

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