Re: losing oil - Saab 900 Bulletin Board - Saabnet.com
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Re: losing oil
Posted by Graham (more from Graham) on Wed, 9 Jan 2002 16:44:50
In Reply to: loosing oil, IndyJoe, Wed, 9 Jan 2002 15:03:53
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If you are not leaking it (or losing it in the coolant), then you must be burning it. At the rate of 1 quart every 500 miles, it might just be visible.
There are 3 possibilities: intake valve, exhaust valve, and rings. Intake valve stem leaks show a bit of smoke when you lift off the accelerator at high revs on a downslope. I think exhaust valve stem leaks are more likely to show smoke on acceleration (and startup). Problems with the oil scraping rings are hard to diagnose unless the compression ring is also going (compression test will find that one). Sometimes a switch to synthetic oil will eventually free up the rings (or a dose of kroil).
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