Re: Ongoing Sludge Diagnosis - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Ongoing Sludge Diagnosis
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Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Thu, 6 Oct 2011 17:38:10 Share Post by Email
In Reply to: Ongoing Sludge Diagnosis, Sean, Thu, 6 Oct 2011 14:00:52
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Are you in the US?

If it had been a 900 with non turbo engine I would have guessed air pump (SAI) starting up normally when cold but the 9-3 US spec doesn't have an air pump. Rest of the world I don't know.

Can you alter the sound by changing the rpm of engine?

I would remove serpentine belt first even before lifting the valve cover just to take all those moving parts out of the equation.
Next I would look at the EVAP system and maybe disable those hoses if for any reason the turbo impeller creates some suction through those during the higher idle at cold start.

I see the check valve is broken for PCV system and the car doesn't have the latest PCV fix #6. It almost looks like it have the #4 fix which might create air noise in the oil filler pipe.

Anders

SWEDECAR

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