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BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

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  #1  
Old 11-01-2011, 09:22 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
Road Noise Help

Do any of you guys (or gals) have issues with road noise? For a while I thought it was my imagination but the road noise in my d has steadily increased from 15k miles to 25k miles. I used to think my d was very quiet on the highway - no longer. The noise is not sensitive to road surface, or driving straight/turning. Its always there. Sounds a bit like an F150 running off-road tires, and it begins at ~40mph, steadily increasing with speed.

Within the past 100 miles the car has received a BMW 4-wheel alignment and 4 new ContiProContact SSRs - same as the old tires. The tone of the resonance changed with the new tires - but it is definitely still there (after reading more posts here, I probably would have gone with a Michelin non-RTF, but the new Contis are a done-deal, now). Tire pressure set at 33/41.

I am posting this in the "D" forum because I recall reading once that the 335d had extra cabin sound insulation to muffle the diesel, versus our gasser bretheren.

I would really appreciate any ideas or experiences you all have. Thanks.
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  #2  
Old 11-02-2011, 06:10 AM
KeithS KeithS is offline
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Location: Central NJ
 
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Mein Auto: '11 335d, '00 540iT
What you are descibing certainly sounds like simple tire noise. But that is usually solved with new tires. You may just be 'sensitized' and are just looking for the noise, thus you find it. It may not be an different that when you first got the car. Try driving a D that may still be on the dealers lot for comparson.
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  #3  
Old 11-02-2011, 09:23 AM
Mrcarcrazy Mrcarcrazy is offline
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Location: Odessa, TX
 
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Mein Auto: 2004 Z4 3.0i, 2005 Elise
I see this as unlikely, however your issue does kinda sound like a wheel bearing....might have a look see. If you are a DIY'er I can tell you a quick easy way to find out, if not, take it to the DLR and ask them to check...

And yes I joined this forum, just to pop in on that Q. (I am also pondering a D)
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  #4  
Old 11-02-2011, 09:27 AM
elester12 elester12 is offline
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Location: SoCal
 
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Does the noise seem to be coming from all corners of the car, center, or just one area?
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  #5  
Old 11-02-2011, 12:22 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
[QUOTE=Mrcarcrazy;6416231]I see this as unlikely, however your issue does kinda sound like a wheel bearing....might have a look see. If you are a DIY'er I can tell you a quick easy way to find out, if not, take it to the DLR and ask them to check...

What's the wheel-bearing check? Would love to know, whether I DIY, or have the dealer do it. Thanks.
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  #6  
Old 11-02-2011, 12:37 PM
KeithS KeithS is offline
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Mein Auto: '11 335d, '00 540iT
There are several methods, sometimes it takes all of them. First sign is the sound is coming specifically from one wheel. Next if it is a bearing, the sound will usually change a lot on turns (get worse or better) as you change the loading on the bearing. You can also jack up the car and turn the wheels feeling for roughness or listening for sounds. But with the weight the car off the bearing, you will not always feel something.

Unless you have LOTS of miles, like over 200K, wheel bearing will probably not be the problem.
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  #7  
Old 11-02-2011, 02:29 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
Thanks all for the ideas. On the drive home tongiht I'm going to see if its possible to determine front/back driver/passenger noise origination.

I haven't seen a decrease in MPG which seems likely with a wheel bearing failure (?)

I'll post back when I know more.
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  #8  
Old 11-02-2011, 03:16 PM
F32Fleet F32Fleet is offline
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Mein Auto: 435i, 335d sold.
Is it getting cooler outside? All tires tend to stiffen up a little in cooler climes and so does the road.
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  #9  
Old 11-02-2011, 07:27 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
Wink

Seems like the noise is more from the rear (where it was before the new Conti SSRs) but its not definitive.

If itís just tire noise, that's fine - but annoying. Thing is I frequently ride with my 2 little kids cross-country and the idea of a drivetrain/bearing failure has been in the back of my mind. Like Keith said, maybe I am just listening for it now, but I'm pretty sure the resonance is new.

Next steps seem like:
-Perform a DIY wheel bearing check
-Have the local dealership take another look at it (their 1st solution was recommendation for new Conti RFTs)
-Pick up a new set of Michelin PSS and see if its a tire issue. I am okay with the non-RFT risk/fixes. Discount tire quoted $780 for 4 mounted & balanced, and Michelin is throwing in an additional $70 rebate

Thanks again guys for the ideas.
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  #10  
Old 11-03-2011, 08:41 AM
KarlB KarlB is offline
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Mein Auto: 11 335d,08 K12GT,10 S1000
I had a wheel bearing replaced under warranty about 3-4 months ago at 18k miles, have them checked at the dealership
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Last edited by KarlB; 11-03-2011 at 08:43 AM.
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  #11  
Old 11-03-2011, 04:13 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
Do you d owners have cabin noise at 75-80mph other than wind?

I put on a set of Michelin PSS today ($711 at Discount). While the car was on the rack I manually turned wheels. The DIY whell-bearing check seemed fine.

But the racket is still there. The tire noise is virtually gone, but I still have the mechanical resononance starting at 40mph and peaking at ~80mph. The car is going to the dealership on Tuesday.

Incidentally, I've only put 10 miles on the new tires, but the 335d feels a lot more planted and responsive with the PSS versus ContiPro SSR.
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  #12  
Old 11-04-2011, 06:54 AM
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TXPearl TXPearl is offline
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This may sound stupid, but have you checked to see that the sunroof is completely closed?

I had what I thought was a tire noise issue until I finally discovered that the sunroof was just barely open (not even visibly so from the outside). Probably happened when I opened the windows via the key fob and it had just started to open the sunroof when I released the button.

It created a dull roar that was only noticeable at highway speeds and increased with speed. Mixed with the "normal" tire noise, it appeared to change tone with road surfaces, further fooling me into believing it was a tire issue.
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  #13  
Old 11-04-2011, 07:58 AM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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I'll double-check the sunroof, thanks for the idea.

Lastnight I had my wife ride in all seats of the car while I was drving. She's pretty sure the noise is coming from the rear drivetrain. The noise is happening under accel and decel now above 30mph (was 40mph). That makes me think its more of wheel bearing than diff problem. Seems like the diff would quiet-up when not loaded and I have not come across 335 diff issues.

If anyone ever runs into this problem, here are some links I found on bimmerfest (mostly 335i / 328) regarding wheel bearing failures at 8k-25k miles. The sound these guys are describing is what my d has. One of the guys noted that his wheel did not have any shimmy when being spun on a lift. Aparently failure of BMW wheel bearings do not always lend themselves to that due to the bearing-race design. If the car is under warranty, as mine is, of course BMW should fix it. If out of warranty these guys mentioned ~$350 per wheel bearing for an indy to repair.

http://www.bimmerfest.com/forums/sho...d.php?t=358492
http://www.bimmerfest.com/forums/sho...d.php?t=213912
http://www.bimmerfest.com/forums/sho...d.php?t=551312
http://www.bimmerfest.com/forums/arc.../t-463562.html

I sent these to my service manager last night, we'll see what happens on Monday.
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  #14  
Old 11-07-2011, 10:59 AM
Mrcarcrazy Mrcarcrazy is offline
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Location: Odessa, TX
 
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Mein Auto: 2004 Z4 3.0i, 2005 Elise
SOrry for the delay in my response.

the most direct route in checking is to jack up the car, w/ wheel suspended, car in N. (obviously this only matters on the rear tires) spin tire w/ one hand...while other hand is on the spring (Feel for a vibration)...get the wheel spinning as quickly as you can....you will feel a vibration if the bearing is bad.

compare each wheel to the other 3 since you've never felt a bad one before...so you know what feels bad/good.

I used to do this for a living, and this was the easiest way of finding a bad wheel bearing I ever discovered. Best of luck.
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  #15  
Old 11-08-2011, 12:31 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
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Mein Auto: 2010 335d, April build
Dealer has confirmed that, at a minimum, rear driver's side wheel bearing is shot. Car still at the shop. Will post full update when I get it back.
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  #16  
Old 11-08-2011, 01:18 PM
Mrcarcrazy Mrcarcrazy is offline
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Quote:
Originally Posted by zach0726 View Post
Dealer has confirmed that, at a minimum, rear driver's side wheel bearing is shot. Car still at the shop. Will post full update when I get it back.
glad to hear you found the problem.
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  #17  
Old 11-08-2011, 04:15 PM
zach0726 zach0726 is offline
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Location: Humble, TX
 
Join Date: Oct 2011
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Mein Auto: 2010 335d, April build
Talking

Drove the d home today with new rear/drivers side wheel bearing. Quieter than a lexus now @ 80mph cruise! Thanks guys for all the tips/ideas.

Were it not for the formum my d would still be howling like a wolf-in-heat! The dealership was very skeptical that it could be a wheel bearing.
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