Wheel bearing diagnosis

Amsca2 · 7th July 2016, 17:21

I've got a whine when driving that changes with speed and is still present with the engine turned off and coasting. I'm assuming a wheel bearing as I've tried moving tyres around and it makes no difference. How do I figure out which one? It doesn't change note when I fling it into corners or woble on a straight. It's also not the wife before I get that answer. I have 2 fronts on order from euro car parts flash sale last night advantage booked for Monday.

Astraeus · 7th July 2016, 17:50

Jack up each corner in turn and after securing with axle stand spin the wheel by hand. Do each one in turn and you should hear clearly which one is at fault. It will have a rumbling noise. It will sound quite different to a wheel that is ok.

Chris

T-Cut · 7th July 2016, 17:54

Quote:

Originally Posted by Amsca2

How do I figure out which one?

Only from where the noise comes from. If there's no obvious graininess when individual wheels are turned by hand, it's rather difficult. I'd suggest getting someone to sit in the rear and listen carefully over each wheel while you drive it on a smooth road. Eliminate as much road/tyre noise as practicable. He may detect sound differences and directions that are impossible for the driver to identify.

TC

Amsca2 · 7th July 2016, 21:24

cheers for the replies. I've tried each in the air and its not worn enough to be noticeable. Clutch took a few months and hubs saw the elements during it so guessing it took on water. I'll get the mechanics opinion and may just get them both done. I'm pretty sure it's a front one.

klarzy · 7th July 2016, 21:37

Spin the wheel and from underneath, hold a long screwdriver blade against the hub, then push your jaw bone just in front of your ear against the other end of the driver, you will be able to hear what's going on inside the hub by conducted noise...

marinabrian · 7th July 2016, 22:10

A rough bearing can normally be felt as a vibration through the road spring, when not audible simply by spinning the wheel too

Brian

DMGRS · 8th July 2016, 20:30

My usual trick is to find a sweeping bend - with more load present, the duff bearing will normally be louder.
Worthy of note - make sure decent branded items are fitted, as cheapies tend to cause ABS issues.

Amsca2 · 8th July 2016, 21:55

I bought Lucas so time will tell. I've also driven it like I stole it around corners with traction control doing its bit and I still can't pin it down. Going to get their opinion and have both done once I'm happy it is a wheel bearing.

klarzy · 8th July 2016, 22:45

Quote:

Originally Posted by Amsca2

I bought Lucas so time will tell. I've also driven it like I stole it around corners with traction control doing its bit and I still can't pin it down. Going to get their opinion and have both done once I'm happy it is a wheel bearing.

Maybe just tyre noise....

Amsca2 · 10th July 2016, 20:10

Quote:

Originally Posted by klarzy

Maybe just tyre noise....

I'm calling off the garage tomorrow as I'm still not convinced. I've a pair of ravs wheels that I will try tomorrow see how it effects the noise. It sounds like a whine of a bomber from a war film. Definitely not drive train related. It is just like really noisy tyres but why would I suddenly notice it more. Grr

7th July 2016, 17:21	#1
Amsca2 Gets stuck in MG ZT-T cdti Join Date: Aug 2015 Location: Grangemouth Posts: 521 Thanks: 60 Thanked 93 Times in 80 Posts	Wheel bearing diagnosis I've got a whine when driving that changes with speed and is still present with the engine turned off and coasting. I'm assuming a wheel bearing as I've tried moving tyres around and it makes no difference. How do I figure out which one? It doesn't change note when I fling it into corners or woble on a straight. It's also not the wife before I get that answer. I have 2 fronts on order from euro car parts flash sale last night advantage booked for Monday. __________________ The Typhoon Bull

7th July 2016, 17:50	#2
Astraeus Regional Secretary North Scotland MG ZS Exclusive 1.0T Auto 2022 Join Date: Feb 2008 Location: Tayport Posts: 5,754 Thanks: 1,676 Thanked 1,855 Times in 1,058 Posts	Jack up Jack up each corner in turn and after securing with axle stand spin the wheel by hand. Do each one in turn and you should hear clearly which one is at fault. It will have a rumbling noise. It will sound quite different to a wheel that is ok. Chris

7th July 2016, 21:24	#4
Amsca2 Gets stuck in MG ZT-T cdti Join Date: Aug 2015 Location: Grangemouth Posts: 521 Thanks: 60 Thanked 93 Times in 80 Posts	cheers for the replies. I've tried each in the air and its not worn enough to be noticeable. Clutch took a few months and hubs saw the elements during it so guessing it took on water. I'll get the mechanics opinion and may just get them both done. I'm pretty sure it's a front one. __________________ The Typhoon Bull

7th July 2016, 21:37	#5
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	Spin the wheel and from underneath, hold a long screwdriver blade against the hub, then push your jaw bone just in front of your ear against the other end of the driver, you will be able to hear what's going on inside the hub by conducted noise... __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

8th July 2016, 20:30	#7
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,320 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	My usual trick is to find a sweeping bend - with more load present, the duff bearing will normally be louder. Worthy of note - make sure decent branded items are fitted, as cheapies tend to cause ABS issues. __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

7th July 2016, 22:10	#6
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	A rough bearing can normally be felt as a vibration through the road spring, when not audible simply by spinning the wheel too Brian

8th July 2016, 21:55	#8
Amsca2 Gets stuck in MG ZT-T cdti Join Date: Aug 2015 Location: Grangemouth Posts: 521 Thanks: 60 Thanked 93 Times in 80 Posts	I bought Lucas so time will tell. I've also driven it like I stole it around corners with traction control doing its bit and I still can't pin it down. Going to get their opinion and have both done once I'm happy it is a wheel bearing. __________________ The Typhoon Bull