Re: 2000 9-5 4-cyl 140K (possible bent valve) - Saab 9-5 Bulletin Board - Saabnet.com
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Re: 2000 9-5 4-cyl 140K (possible bent valve)
Posted by Paul B. (more from Paul B.) on Mon, 3 Mar 2008 18:48:57
In Reply to: Re: 2000 9-5 4-cyl 140K (possible bent valve), whereditgo, Mon, 3 Mar 2008 17:54:58
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Debris from sludge would have to get past the oil screen to get to the relief valve, and that's one of the problems with these engines - the screen on the pick up is a fine mesh and it gets cloggged starving the engine of oil. If there is debris causing the relief valve to hang up it probably is the result on internal mechanical damage (metal chips)possibly from oil starvation.
Anders posted some good pictues a while ago of a scored releif valve piston.
If your light went out when you added oil, and it stays out when the engine is making noise, it's likely not the relief valve. I think your pick up screen / oil pan is still the prime suspect though.
posted by 75.16.16...
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