Strange Whirring noise??

[Guest]

Hi guys, When i hit about 90 to 100km/h i get this whirring sound.

To describe it by word it would sound like this.... Whoooo...whooooooo...whoooo...whooooooo...whoooo (sounds like very faint tyre rub, not like a train WOO WOO!)

On m'way i have chucked the car in to neutral and it doesn't change, so it's not affective by the gearbox speed, i think?

I have had the right front lower control arm replaced and a wheel alignment done a week ago as previous owner had bent the original, tyres are in good condition.

Any idea what it could be? Wheel bearing, front diff, cv joint, bad tyre noise, gearbox?

Thanks in advance, Dan

[rex-leggy]

is the noise coming from the right side? is that why you replace the right lower control arm

id go with wheel bearing. jack it up an see if there's any movement

[DRFVDR]

 rex-leggy said:

is the noise coming from the right side? is that why you replace the right lower control arm

id go with wheel bearing. jack it up an see if there's any movement

+1

[WRXONP]

could also be diff too.. as a diff wurring will normally still be there when in neutral and in gear...normally if the wurring noise changes note when going from decel to accel then its the diff...if the wurring stays the same even when switching between decel and acel (acel and decel use a different side of the crownwheel teeth) then its more than likely a wheel bearing

hope this helps

[Guest]

Hi and thanks for the replies.

I'd say it sounds like from the right front side and i replaced the control arm as it was bent / pushed back.

I have only taken the car to about 110kmp/h so far and the time/pause between whirrings gets faster as the speed increases. No difference whether im on accel or decel or in gear or in neutral.

Does it still sound like a wheel bearing? as i'd hate it to be the front diff

[Guest vf20/21bg5]

Most likely bearing but try to wind up windows and take it to the problem speed and on a smooth quiet rd and try to pin point what side/front/rear it is from that way. Somthimes very hard to diagnose a awd wheel bearing noise by jaking it up and spinning it ,unless its under load at speed. Plus it may be worn and noisey but not have much or any play when jacked up.

[WRXONP]

You should be able to jack it up . . Feel it for top / bottom play and left / right play . . . Also spin the wheel and hold the spring . . . If you feel nasty vibrations while holding the spring you hit the jack pot ! Thats how you check wheel bearings for warrents

[DRFVDR]

Not as easy as that on an AWD car as spinning it fast enough cant done the "wiggle" test also very hard on a bearing that has the drive shaft thru the middle of it

one way I test for bearing noise, is take car for a drive,get it warm(makes grease in bearing thinner) find an empty section of road, now go from left to right at about 70 slowly (ie make the turns slow but at 70 to load up the bearings) and listen to see if the noise changes

[WRXONP]

Must be a feel I have then man I can all ways feel a worn wheel bearing . . . Probably because I use to be wof inspector . . . Plus open front dif mean the front will spin fast if both wheels are off the ground