997 Carrera 4 Interior Cabin Noise

[wlc4]

I have a 997 Carrera 4 with a manual transmission. The car is stock except for and EVOMS cold air intake that came with the car when I bought it last year. I purchased the car with about 7k miles on it. I have put about 2k more on it mostly commuting to my office. A few months after I bought the car I began to notice a vibrating noise that seemed to be coming from the b-pillars of the car. Specifically at around 3k RPMs the driver side would being to make a resonating noise, the at 5k RPMS the passenger side would make a similar but louder noise. I have taken it to my dealer several times. The service manager suggested to me that perhaps my sense of hearing is better than his! All they have tried to do is insulate the interior of the b-pillars with foam tape. While the noises aren't as loud as they once were, they are still noticeable. IT IS DRIVING ME CRAZY!!! This is my first Porsche. I have heard that older ones do make some weird noises, but I have didn't think the 997s had any of these issues. Any advice or suggestions would be appreciated!

[RFM]

The left and right rear windows are adjustable with nuts just behind the B pillars, some cars suffering with loose nuts and rattle/vibrate windows, check this first. Let someone GENTLY push the window from the inside to the outside, the noise must go away.

[dodo]

Make sure your tires are not overinflated. Set them to PARTIAL LOAD pressure (33/39). If you have TPMS, it can tell you if the tires are overinflated (just follow the TPMS menu). Overinflated tires cause annoying vibrations in the cabin. Do not let the dealer remove more cabin panels until you make sure that the tire pressure is OK.

[wlc4]

Make sure your tires are not overinflated. Set them to PARTIAL LOAD pressure (33/39). If you have TPMS, it can tell you if the tires are overinflated (just follow the TPMS menu). Overinflated tires cause annoying vibrations in the cabin. Do not let the dealer remove more cabin panels until you make sure that the tire pressure is OK.

I don't have TPMS, but I would've assumed that they checked the pressure when I went in for my 2 yr service?? Thanks for your reply.

[wlc4]

The left and right rear windows are adjustable with nuts just behind the B pillars, some cars suffering with loose nuts and rattle/vibrate windows, check this first. Let someone GENTLY push the window from the inside to the outside, the noise must go away.

I presume the b-pillar assembly has to be removed to access the nuts? I guess I should suggest this to the dealer then. Thanks for the help!

[silotwo]

Make sure your tires are not overinflated. Set them to PARTIAL LOAD pressure (33/39). If you have TPMS, it can tell you if the tires are overinflated (just follow the TPMS menu). Overinflated tires cause annoying vibrations in the cabin. Do not let the dealer remove more cabin panels until you make sure that the tire pressure is OK.

I don't have TPMS, but I would've assumed that they checked the pressure when I went in for my 2 yr service?? Thanks for your reply.

I would not assume that the dealer correctly inflated your tires at service. At my 30k mile service I noticed the car making loud noise on the way home, checked my tire pressure the next day when cold and they were an honest 5lb underinflated at all 4 corners. I properly inflated the tires and the noise instantly disappeared. I am not saying tire pressure is the cause of your noise, I am just saying it is better to check than to assume dealer has things correct.

[nastinupe1]

Check your rims, they may have a ding in them. Mine did.