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Old 09-22-2014, 04:42 PM   #1
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so confused on the sludge issue

I've been looking at the engine sludge issue online and im getting conflicting and no resolution. What is the fix for the engine sludge issue to prevent it from happening?
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Old 09-22-2014, 06:02 PM   #2
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It's simple. Fixed from the factory in 9-5's in 04. New gen 9-3 never had the problem, old 9-3 was discontinued before the fix (all t7 affected).

To prevent the problem, use latest vent kit (Pcv 6) and frequent (3-4k) mile oil change intervals with quality synthetic oil.

If a car has a sludge issue, the damage may be complete and not reversible except by rebuild. Some are on various stages of destruction though and may last a while if they are cleaned up. The *only* way IMHO to check for sludge is to drop the oil pan. This must be done anyhow to clean the sludge.
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Old 09-22-2014, 07:19 PM   #3
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im looking at this car without the issue the car is owned by a fanatical owner who did the frequent oil changes with full synthetic and if I buy the car i will drop the pan and clean it. So I put on the latest vent kit and do more oil changes. I usually do them every 5K miles with all my cars old and new with full synthetic. This vent kit PCV 6 is a plug and play application.
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85 900T sedan,
91 900T Cabrio
95 9000 Aero,
89 900T vert,
85 SPG
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Old 09-22-2014, 07:33 PM   #4
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Yes. Here is the installation bulletin:
http://www.genuinesaab.com/psi/files...17ed4%20en.pdf

My 2000 aero had 250k miles on it when I pulled the motor for other reasons (trans lost reverse and water pump failed and put a hole in timing cover). I decided to rebuild, but probably shouldn't have it was in such nice shape.
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Old 09-23-2014, 06:58 AM   #5
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You are going to be fine. Any car can get sludge, saab or otherwise. Modern PCV systems are harder on oil, period. Saab's early attempts at PCV systems exacerbated the problems. The BEST solution is frequent oil changes. The updated PCV system helped a lot too.

Saab was selling these cars with 10k mi OCI (I think)? People would push the 10k number, swap conventional for synthetic, and problems start happening.

I really don't think you have major cause for concern.

If you are really worried, pull the valve cover off and drop the oil pan. If you see a bunch of sludge, you can physically remove a large amount of it. It takes a lot of time, but can be done.
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Old 09-23-2014, 09:11 AM   #6
 
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Ditto to everything said above. If you're worried, drop the pan, clean it and enlarge some of the holes in the pickup screen if it's a T7 engine. (The B2x5 engines used a finer mesh that contributed to some of the oil starvation issues.)

Run a flush cycle with a naphtha-based oil treatment for a few thousand miles after you get it, then 3-5K mile OICs with a high-quality full syn thereafter.
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Old 09-24-2014, 05:54 AM   #7
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sounds nice and easy..
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95 9000 Aero,
89 900T vert,
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Old 09-24-2014, 06:15 AM   #8
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I think the sludge issue is over blown these days. I have stopped immediately dropping every oil pan in sight unless they exhibit low oil pressure problems. I do however, install the latest PCV kit just for peace of mind.
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