Moaning from rear....
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Discussion

molineux1980

Original Poster:

1,251 posts

243 months

Tuesday 21st June 2011
quotequote all
No, I don't have the missus locked in the boot.

It's not something i've really noticed before, but my old man went out in my 91 1.6 MX-5, and commented on a moaning from the back end. Now, the n/s/r wheel is buckled slightly where it looks like a previous owner slid into a kerb. Could it be this? Or is my diff about to explode in a oily ridden, swarf laden mess?

Another little niggle is an odd creaking noise when braking to a standstill, such as pulling up to a junction.

Its a fairly tired, 112,000 mile MX-5, probably with little TLC until I bought it about a year ago. Its been fantastic so far (other than the ball joint failure posted on her a few monts ago, which caused the wheel to fall off)!

MX-5 Lazza

7,954 posts

243 months

Tuesday 21st June 2011
quotequote all
It's probably nothing. MX5s have little sound protection made worse by the fact that the hood drain tubes transmit transmission & dif noises direct to the cabin. I've yet to find an MX5 in which you can't hear noises (unless they are being drowned out by exhaust/induction/charger/turbo).

Aizle

12,429 posts

199 months

Tuesday 21st June 2011
quotequote all
Is it a droning/whining noise? Could it be a wheel bearing?

Does it get louder at a certain speed, rather than just with speed?

molineux1980

Original Poster:

1,251 posts

243 months

Tuesday 21st June 2011
quotequote all
The noise does get louder at speed, does rocking the jacked up wheel still work for worn wheel bearings?

Sbloxxy

120 posts

251 months

Tuesday 21st June 2011
quotequote all
Sounds very much like a wheel bearing. I sell lots of MX5s and replace lots of wheel bearings. When driving, if you weave the car from side to side (quiet road of course) and you can sometimes hear the noise come and go. If it does that, its almost certainly a wheel bearing. Rocking the wheel doesn't always work.
Another way of identifying the noise (Health and Saftey people look away now) is to jack the rear of the car so the wheels are clear of the ground. Then run the car while its in gear so that the wheels are spinning slowly. Using a long screwdriver etc as a 'stethoscope', you can often accurately trace the source of the noise.
Or you could catch yourself on the dangerously spinning wheels and then a noisy wheel bearing will be the least of your worries anyway...

molineux1980

Original Poster:

1,251 posts

243 months

Tuesday 21st June 2011
quotequote all
I may try the second option.....

My drive is a bit uneven and i've struggled to get a trolley jack underneath. Then i'd worry about putting it through the knackered sills............