Question about 1998 Saab 900

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I have 1990 saab 900 turbo, it is vibrating a lot when i accelerate after 50 mph, wheels are balanced, its definitly a power related thing and the exahuast shakes alot also from this vibration....bit of a mystery!

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  • 51 Answers

Hi John:

First suggestion would be to have the three engine mounting bushings checked out, these dampen the normal engine vibrations and if they have failed (gone soft, perhaps from contamination by oil, or just age) they don't restrain the engine. Polyurethane is possibly the best replacement.

I'm assuming that there are no other problems with the engine through it's rev range, until you get to that speed? And that the engine otherwise runs smoothly, even after that speed?

The other possibility is imbalance in the axle half shafts. Did you have the wheels balanced on the car? That might balance all the rotating parts.

Let us know.

Good luck!

Saabreur

Posted on Aug 09, 2009

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