Humming Sound - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ls1ac · 11-16-2019, 12:39 PM

Is there a change in sound with long right or left turns?
Still would not discount tires, try over inflating just for a test.

sato · 11-16-2019, 01:06 PM

If you also inspected tires and made no difference, it could very well be bearings going bad like others have said. I'm getting ready to replace my rear hubs @120k miles. Did the fronts at @80k.

humfrz · 11-16-2019, 02:45 PM

Quote:

Originally Posted by JD001

This sort of thing...

Oh, "bushings" -

But how do bad bushings make a "humming" sound (with a car with an ICE)?

humfrz

JD001 · 11-16-2019, 02:58 PM

Quote:

Originally Posted by humfrz

Oh, "bushings" -

But how do bad bushings make a "humming" sound (with a car with an ICE)?

humfrz

Bushing deteriorate allowing components to move or vibrate leading to abnormal NVH. It's that 'chicken and egg' thing.. bearings fail leading to bushes to fail or bushes fail leading stress on the bearings..

ActionMaxon · 11-16-2019, 10:13 PM

If it is front wheel bearings, you can determine location by "loading" one side. A sharp turn to the right will load the left side and vice versa for right. Sometimes if it's tough to determine location you can jack up the front. Put one hand on the coil spring and spin the wheel with your other hand. You may feel a vibration. If you do, that is the side with the bad wheel bearing.

humfrz · 11-17-2019, 02:40 AM

Quote:

Originally Posted by JD001

Bushing deteriorate allowing components to move or vibrate leading to abnormal NVH. It's that 'chicken and egg' thing.. bearings fail leading to bushes to fail or bushes fail leading stress on the bearings..

really?

JD001 · 11-17-2019, 03:09 AM

Quote:

Originally Posted by humfrz

really?

Look, I only drive the thng (occasionally) and read the Bible that is this Forum... I can make some more connections if you like.. ie tyres unevenly inflated or a driver that is unevenly knowledged or roads that are unevenly coated.. gosh there are so many 'chicken and egg' things that could wreak havoc.. poor bushes!!!

humfrz · 11-17-2019, 03:16 AM

Quote:

Originally Posted by JD001

Look, I only drive the thng (occasionally) and read the Bible that is this Forum... I can make some more connections if you like.. ie tyres unevenly inflated or a driver that is unevenly knowledged or roads that are unevenly coated.. gosh there are so many 'chicken and egg' things that could wreak havoc.. poor bushes!!!

OK,OK,OK - let's suggest to the OP that he replace the front wheel bearings and all the bushes. Then, if he still hears humming, we can conclude it's all in his head - a kind of tinnitus.

humfrz

kmbkk · 11-17-2019, 09:38 AM

Quote:

Originally Posted by humfrz

OK,OK,OK - let's suggest to the OP that he replace the front wheel bearings and all the bushes. Then, if he still hears humming, we can conclude it's all in his head - a kind of tinnitus.

humfrz

Lol, it could be in my head. I’ve flown planes for over 18 years now (mostly prop) so who knows

gravitylover · 11-17-2019, 11:30 AM

Mine was rear wheel bearings. My assumption is it was the drivers side based on how it fell apart when I went to pull it but the insides looked surprisingly good compared to the noise it was making. There was just about NO movement in either wheel when it was off the ground and I wobbled it up and down but the noise in the car went from a low speed dependent rumble to an exceedingly annoying growl. FWIW with 127k on my 2013 the fronts still seem to be fine even though that's what more people have to replace first.

Ultramaroon · 11-17-2019, 03:35 PM

+1 wheel bearings

Easy test for the front. Not so for the rear. Drive wheels are kind of a bitch. That being said, with a couple jack stands and a helper, it can be confirmed.

Spread the pads a touch.
Lift the wheel.
Spin it.
If you hear anything at all, the bearing is toast.

I've run mine in gear on jack stands. If you can't do pedal dance, weird shit will happen until it goes into limp mode. Especially in fifth gear the driveline is pretty quiet. I'm sure I'd hear a wheel bearing howl.

humfrz · 11-17-2019, 03:48 PM

Quote:

Originally Posted by kmbkk

Lol, it could be in my head. I’ve flown planes for over 18 years now (mostly prop) so who knows

Especially if they were crop dusters, spraying methyl parathion and stuff like that -

humfrz

humfrz · 11-17-2019, 03:59 PM

Quote:

Originally Posted by Ultramaroon

I've run mine in gear on jack stands. If you can't do pedal dance, weird shit will happen until it goes into limp mode. Especially in fifth gear the driveline is pretty quiet. I'm sure I'd hear a wheel bearing howl.

OK, I got the picture.

Car falls off jack stands while running in 5th gear -

humfrz

Ultramaroon · 11-17-2019, 04:33 PM

I guess I wasn't clear enough. The helper stays ready to step on the clutch.

Only an idiot would do otherwise. I guess while we're on the subject, don't fuck around gunning it either.

11-16-2019, 10:13 PM	#19
ActionMaxon Professional Auto Fixer Join Date: May 2019 Drives: 2016 Oceanic FR-S as Designed Location: Oregon Posts: 123 Thanks: 41 Thanked 70 Times in 46 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	If it is front wheel bearings, you can determine location by "loading" one side. A sharp turn to the right will load the left side and vice versa for right. Sometimes if it's tough to determine location you can jack up the front. Put one hand on the coil spring and spin the wheel with your other hand. You may feel a vibration. If you do, that is the side with the bad wheel bearing. __________________ Work Hard. Play Hard. 2016 Oceanic

11-17-2019, 11:30 AM	#24
gravitylover Senior Member Join Date: Nov 2014 Drives: 2013 BRZ Premium 6MT White Location: SE NY Posts: 1,503 Thanks: 1,218 Thanked 669 Times in 474 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Mine was rear wheel bearings. My assumption is it was the drivers side based on how it fell apart when I went to pull it but the insides looked surprisingly good compared to the noise it was making. There was just about NO movement in either wheel when it was off the ground and I wobbled it up and down but the noise in the car went from a low speed dependent rumble to an exceedingly annoying growl. FWIW with 127k on my 2013 the fronts still seem to be fine even though that's what more people have to replace first. __________________

11-17-2019, 03:35 PM	#25
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1118 Post(s) Tagged: 9 Thread(s)	+1 wheel bearings Easy test for the front. Not so for the rear. Drive wheels are kind of a bitch. That being said, with a couple jack stands and a helper, it can be confirmed. Spread the pads a touch. Lift the wheel. Spin it. If you hear anything at all, the bearing is toast. I've run mine in gear on jack stands. If you can't do pedal dance, weird shit will happen until it goes into limp mode. Especially in fifth gear the driveline is pretty quiet. I'm sure I'd hear a wheel bearing howl. __________________ service manuals

11-17-2019, 04:33 PM	#28
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1118 Post(s) Tagged: 9 Thread(s)	I guess I wasn't clear enough. The helper stays ready to step on the clutch. Only an idiot would do otherwise. I guess while we're on the subject, don't fuck around gunning it either. __________________ service manuals

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