Inspect your timing cover - Saab 9000 Bulletin Board - Saabnet.com
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Inspect your timing cover
Posted by David Ingram (more from David Ingram) on Thu, 6 Oct 2011 11:32:54
In Reply to: Re: engine problem diagnosis, Rob T, Thu, 6 Oct 2011 09:54:16
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In later 4 cylinders (the sludgemasters in NG900s and 9-5s) a common scenario was for debris to get sucked into the oil pump, and as it spun around in the oil pump gears, to score the timing cover. This led to loss of vacuum and a resultant drop in oil pressure, and was/is a common culprit in the deaths of many of those engines.
Although yours is older and of better quality, you might want to take a look at the inside of your timing cover and inspect your oil pump gears for signs of such an event. If you see any marks deeper than the normal superficial buffing on the timing cover, you should replace the cover. Possibly this would be how your bearing initially began to wear???
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