Question about wheel noise

[RedCobra]

Hello,

This is my first post here, I had a problem and ran some searches, didnt come up with anything so I thought I would post. The car is a 2000 911 C2 Convertible Tip-S (my first 911, coming from a corvette / camaro - Bought it used). Car has 65k miles.

Recently this car developed a rear wheel noise at low speed. It was raining outside and after the rain, when I drove it at slow speeds it sounds like brake rub noise (or maybe wheel bearing noise). It completely goes away when I go past 25MPH. I am mostly used to solid rear axles. Any thoughts on what could this be?.

Thanks,

[dr914jr]

I'd say rear wheel bearings are a good bet. Are your rear tires worn?

[RedCobra]

Actually something wierd I noticed. The right rear (where the noise was coming from) tire the air pressure was really low, it was reading 10psi (manual says 44 psi). When I filled air back up the noise seemed to go away. However it also stopped raining.

It did sound like wheel bearing noise, but more closely resembled something that needed to be greased. Are the rear bearings greasable?.

[dr914jr]

No, They're sealed units. You probably nixed the noise by adding 34psi th the tire in question. :)

Edited September 15, 2008 by dr914jr

[bella1]

Hello,

This is my first post here, I had a problem and ran some searches, didnt come up with anything so I thought I would post. The car is a 2000 911 C2 Convertible Tip-S (my first 911, coming from a corvette / camaro - Bought it used). Car has 65k miles.

Recently this car developed a rear wheel noise at low speed. It was raining outside and after the rain, when I drove it at slow speeds it sounds like brake rub noise (or maybe wheel bearing noise). It completely goes away when I go past 25MPH. I am mostly used to solid rear axles. Any thoughts on what could this be?.

Thanks,

I just replaced all four bearings on my 2001 996 with 58K miles. I do track my car mostly and it has maybe 75 DE days and the rest is street. Of ocurse, with most road courses having a clockwise rotation, my left side was where the problems arose. While the two right sides were not making noise, I just replaced all four for safety. Bearings front are $65 rear $110 and labor is about 2.2 hours per wheel.

Edited September 15, 2008 by bella1

[RedCobra]

I just replaced all four bearings on my 2001 996 with 58K miles. I do track my car mostly and it has maybe 75 DE days and the rest is street. Of ocurse, with most road courses having a clockwise rotation, my left side was where the problems arose. While the two right sides were not making noise, I just replaced all four for safety. Bearings front are $65 rear $110 and labor is about 2.2 hours per wheel.

Nice car BTW :). I dont know if it was the rain getting the bearing to make that noise or the tire pressure...it seems to have gone out. I guess when I do bearings, I could do brake pads also (same labor to get there). How hard is it to DIY the job, are there any more non-reusable parts that have to be bought in advance?.

[bella1]

I just replaced all four bearings on my 2001 996 with 58K miles. I do track my car mostly and it has maybe 75 DE days and the rest is street. Of ocurse, with most road courses having a clockwise rotation, my left side was where the problems arose. While the two right sides were not making noise, I just replaced all four for safety. Bearings front are $65 rear $110 and labor is about 2.2 hours per wheel.

Nice car BTW :). I dont know if it was the rain getting the bearing to make that noise or the tire pressure...it seems to have gone out. I guess when I do bearings, I could do brake pads also (same labor to get there). How hard is it to DIY the job, are there any more non-reusable parts that have to be bought in advance?.

I would not attempt the bearing replacement. I watched one come out and you need a press to take out and put back. My mechanic has a listening device he attaches to the shock towers. The he runs the car and listens for the noise. In my case, there was no noise until it warmed up after a mile or so. That was the left rear. The right side was OK but I replaced just for safety knowing it would not be long until they went as well.