Rear Road Noise, Noise Gets Lauder As You Go Faste - BMW Forum

victorgallas · 01-24-2005, 08:35 AM

OK first of all ive lookied for something about it on the search posts, could not find anything. so here it goes./.

ive noticed that when im driving the car, the faster i go the launder this noise gets,
it comes from the rear of the car, i haqve a rebuilt suspension and the wheels are brand new..

what is raod noise suppose to sound like? what is the sound of a worn cv joint? all my fluids are 6 months old, and are all synthetic., so i dont think is diferential..

Ill try to record the noise and will post here tomorrow most likely.

but in the mean time, can someone give an idea of how this sounds like?

thanks.

YoungExec728 · 01-24-2005, 01:34 PM

if it's a knocking sound its your rear shock mounts.

Furious · 01-24-2005, 01:40 PM

hmmm, could be a shock mount if you didnt replace them when you did your suspension, but its a differnt noise.

do you think it could be a wheel bearing? does it get louder the faster you go? then all of a sudden near a certain speed it goes away?

also check your tires, if you lowered your car, maybe its your tires.

victorgallas · 01-24-2005, 02:27 PM

Quote:

Originally posted by Furious@Jan 24 2005, 01:40 PM
hmmm, could be a shock mount if you didnt replace them when you did your suspension, but its a differnt noise.

do you think it could be a wheel bearing? does it get louder the faster you go? then all of a sudden near a certain speed it goes away?

also check your tires, if you lowered your car, maybe its your tires.

[snapback]278137[/snapback]

well the shock mounts i did replace them so i took that out of consideration..

the wheel bearings.. the noise does not go away the faster you go, it just increased,, but it does not go away..
and how does a wheel bearing failing sounds?

also my tires are brand new, im using yokohama on all four, how can the tires affect it.. if needed, ill send the tyre number specs, dont remenber of my head.

thanks

-pimpin328is- · 01-24-2005, 05:43 PM

i know when i had a bent rim the road noise got louder as my speed increased. I know you said that your wheels were new but its just a posibility.

victorgallas · 01-24-2005, 06:11 PM

Quote:

Originally posted by -pimpin328is-@Jan 24 2005, 05:43 PM
i know when i had a bent rim the road noise got louder as my speed increased. I know you said that your wheels were new but its just a posibility.

[snapback]278315[/snapback]

actually you could be right,, because i have a new set of tyres, but my rims where purchased for aorund 300 , five rims got them with a buy at ebay that lived closed by, i know they where not perfect, and so before putting them on the car i took them to a guy to raound them off. and it did help.. but off course they wont be nicely round as new ones...

anyway thanks for th eidea..

Furious · 01-24-2005, 11:00 PM

see the problem is i dunno what road noise sounds like, to be honest. what does it sound like? describe it for me the best you can.

victorgallas · 01-25-2005, 05:59 PM

[attachmentid=17696]ok i got the wheel specs on my car, i have a set of yokohama A550V with some 10k. so they are good.

the rims are BMW set pictured below.

the tire size is P225/50R16 91V
So i dont know is this contributes..
also ill put the sound clip tomorrow i have to record it.

also out of curiosity, how does a failed CV joint sounds like.. I've inspected the rubber boots its all good. but do they make any noise.?

And the last thing, if the differantial has low oil, what does it saound like...?

i've replaced my differential oil its been 6 months with syntetic, but i know its leaking very little since the exterior part around the seal is wet, but not dripping, one of those very low leaks. anyway just wondering how that sounds..

have a good one, thnaks for the help, and ill have the sound clip tomorrow.

victorgallas · 01-28-2005, 05:14 PM

Quote:

Originally posted by Furious@Jan 24 2005, 11:00 PM
see the problem is i dunno what road noise sounds like, to be honest. what does it sound like? describe it for me the best you can.

[snapback]278559[/snapback]

hey man here is an audio clip of the noise.. the click noises you hear on the sound clip are the microfone hitting the seats.. but pay attention to the main noise..

notice it keeps change its frequency as you go faster..

pretty much is that the faster you go, the more faster this noise occurs..

anyway if someone could let me knoew what is this??? ive checked suspension i dont seee anything loose.. and is all new..

and wehn driving o dont feel vibration on the center of the car, so i dont think it has something to do with the drivesaft, just the noise coming from the rear..

and could this be low oil on differentail?

thanks for the help./. its driving me insane...

[attachmentid=17773]

Furious · 01-28-2005, 06:18 PM

honestly is sounds like a problem with one of your tires. have you gotten them checked out? if not get a good look at the wheel bearing. if the noise changes exactly with the speed, than its (IMO) probably gonna be related to the wheel or surrounding parts.

Speedy-325is · 01-28-2005, 08:59 PM

uhhhh, I'll bet anyone a 12 pack of beer that its the wheel bearing.

does it happen to come from the left rear area????? that one is usually the one to go.

Mark

catalyst. · 01-28-2005, 09:50 PM

I doubt its your rims, if one of your rims out of the round the noise would be accompanied by vibration that gets worse the faster you go.

victorgallas · 01-29-2005, 01:48 AM

Quote:

Originally posted by Speedy-325is@Jan 28 2005, 08:59 PM
uhhhh, I'll bet anyone a 12 pack of beer that its the wheel bearing.

does it happen to come from the left rear area????? that one is usually the one to go.

Mark

[snapback]281340[/snapback]

i shit, it does come from the left.. damm it...

it better to replace both rear ones at the same time?
also does someone know where can i get the bearing tool, rent it.. i really dont want to take the whole trailing arm out..

just one thing,, when bearings go bad, dont they make a metal screeching noise???

just wondering, thanks everyone///

please let me know...

damm it, im so pissed if its the bearings...
have a good one.

Furious · 01-29-2005, 03:01 AM

its important to maybe get a professional opinion first. so that you dont spend money and not get it right.

Speedy-325is · 01-29-2005, 04:31 AM

the rear bearings truly are a PAIN IN THE ASS!!!!!!! its always better to do both....no they dont have to make the screaching noise, and i have no clue about the tool rental, but u will need a 32mm 12 point socket, an air wrench, and a little more than a clue when it comes to wrenching.

for most, i'd recommend a good shop, unnless u can handle a headache.
good luck.

OH..... and i will 2nd the 2nd opinion idea.

Mark