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  #1  
Old 31st March 2009
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jwwells jwwells is offline
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Default Vibration during idle

Hey All
Just got a new Aero which has a strong vibration during idle. The vibration is only during idle and if I shift into neutral at a stop light is gets better, but the vibration doesn't go away. If while at the stop light I rev the engine to about 1100 rpm the vibration goes away.
I am thinking it is an engine mount, but anybody else have these symptoms and can suggest a solution?
Thanks
2002 Cosmic Blue Aero Sedan Auto 93K miles
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  #2  
Old 31st March 2009
jweict jweict is offline
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I had the same problem on my 2001 Saab 9-5 and changed the engine mounts. Now I don't have any vibrations. I did it when the car had about 101k miles.
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Old 1st April 2009
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Yep that is correct, the mounts are designed to absorb the high vibration level at low rpm below 1000. It is an indication of mounts deterioration when you start having high vibration level transmitted to the body at low rpm.
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Old 1st April 2009
chk chk is offline
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I have that idle vibration on my 126K 01. I went to eEuroparts and find a RH (passenger side) mount, a Rear Engine mount, but no LH (driver's side) mount. So I assume there isn't one? And is this a DIY job for a beginner?

Thanks
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Old 1st April 2009
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Yes the Right Engine Mount is a DIY, the left side of the engine has the Transmission and there are two transmission mounts that you can replace.
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  #6  
Old 1st April 2009
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There are two other engine mounts, the left hand mount and torque rod. Both are different based on either manual or auto tranmission.

If you are based in the states, try also GS (Genuine Saab), RMeuropean, from Europe, try PFS.

All of them can be done as DIY, I have done all 4 with the rear one being most difficult. But after you do the right and left hand mounts, it should provide some clearance relieve on the rear mount to remove and replace it.
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Old 1st April 2009
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In my personal experience, engine mounts do not make a amazing difference in idle vibration. It's really just the nature of the beast of the 4-cylinder engine. Before you go spending all the money on mounts, go test drive a 9-5 with fewer miles and see how yours compares. My '04 only has 35k miles and it shakes like crazy at idle in drive. I just accept it though, it doesn't bother me much.
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  #8  
Old 2nd April 2009
Moekazi Moekazi is offline
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My 2003 Aero vibrates at idle, too. I've swapped out the short belt for the long belt and new pulleys. I've swapped the left, right, and front (dogbone) transmission mount. It's gotten a little better, but it's still there.

One thing about the mounts, i was pretty surprised how much they sagged. The new mounts raised the engine at least 1/2". Everything else on the car seems pretty well done, but the mounts... they must have been assigned to the Engineering interns.

.
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  #9  
Old 2nd April 2009
TigerSilhouette TigerSilhouette is offline
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You guys should also use the Tech2 to increase the idle speed. The tech 2 allows increments of 10 RPM up to a maximum of 50 RPM increase over the base idle. I have noticed that on the 4 cylinder engines, increasing the idle by 50 RPM gives a smoother idle. Try it out!


Lawrence
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  #10  
Old 2nd April 2009
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If you cant figure out of the mounts are worn out, take it to a mechanic, theyll tell you right away. I took out my transmount and it passed visual inspection. It turned out to be completely seperating under torque. Not the same problem, but sometimes they look ok and arent.
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