Problem with Geometry

[paulrobvhr]

Hi all,

I have a 2003 996 C2 UK spec car.

I have had the car for 2 years and have always had problems with bump steer/poor steering handling. It got progressively worse and worse and so recently I took it into a good Porsche specialist for them to take a look. They diagnosed it was a problem with the tyres and so I got them to put on 4 new Pirelli PZero Rossos. The geometry was done and all wheels were balanced.

The car drove fantastically for about 4 weeks then the problems started again. I am getting some bump steer and the steering feels very light again – like not all of the tyre is making contact with the road.

It seems like the geometry has been pushed out of alignment but I don’t drive the car hard and I can’t think of any reason why the geometry is out (i.e. I haven’t hit a bump or kerb at high speed) I do drive over speed bumps but not at excessive speeds.

I can take it back in to get the geometry re-done but at £250+ per time it is expensive if I have to do this every 4 weeks!

Does anyone know of the root cause of the geometry keep being pushed out of alignment? Are there any other components that I should replace to keep the geometry aligned?

[Loren]

Have them check the upper strut mounts for wear or for being loose.

Under the car have them check the torque on the front swaybar - these loosen with time too.