Date: Fri, 27 Jun 2003 17:21:18 GMT From: hohnopsamlid.invalid (Goran Larsson) Subject: Re: Good Snow Tires for Saab 9-5 Aero?
In article <bdhegd$jsa$1nopsam.atl.mindspring.net>, J. Harris <insectoatmindspring.com> wrote: > On a related note, earlier this year Saab USA issued a RECALL/service-notice > for 9-5 owners that alternate between alloy and steel rims. Seems there's > some sort of corrosion-risk or stem-breakage concern. If the surface between the wheel hub and rim is not cleaned (as it should be) then the corrosion/salt deposits/sand/junk/whatever could result in the wheel hub and rim surfaces not being parallel. The result of this is bending forces on the screw when the threaded part follow the wheel hub and the conical part follows the conical hole in the alloy rim. The garbage can accumulate during winter because the alloy and steel rims have different sizes on the area that rests against the wheel hub. The bending forces on the screw can weaken the screw and have in some cases resulted in broken screws. > A no-charge "fix" > should be available at your dealer. The fix is a new set of wheel screws. The difference is that the conical part of the new screw is free to move. A picture on my homepage < http://www.nospam.com/saab/hjulskruvar.jpg > shows the old wheel screw as #2 from the left, new wheel screw as #3 (conical part close to head) and #4 (conical part close to threads). Screw #1 is a third party wheel screw with the same dimensions as the Saab wheel screws. If correct wheel change procedures are followed (clean area, torque screws in a star pattern, use correct torque) the old wheel screws should be perfectly fine (and Saab does not replace them on the Aero as the Aero can not use the 15" steel rims due to the large brakes). If you alternate between alloy and steel rims and don't follow the correct procedures (or are not sure that the workshop follows the correct procedures) then the new wheel screws will remove one possible problem. -- G–ran Larsson http://www.nospam.com/saab/
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