Verandah
17-09-2013, 10:24 PM
Since buying my TR I've noticed a whirring sound from the w/bearings that I can't place.
It's really noticeable at 60k's and at this stage I've only had it to 70.
I've listened for it from all seats and with the armrest down and ski door opened, can't place it.
It doesn't load up with swerving as a tapered bearing would and it is not a rumble like a bearing with the case hardening breaking up.
I was told the car had new halfshafts about 5 yrs ago.
So I started diagnosis by loosening a front axle nut and checking the torque.
The spec is 200 - 260Nm. At about 260, the nut lined up with the horizontal hole in the axle.
Previously they had the hole almost lining up with the vertical hole.
My conclusion is that they rattled the nut up to around 400Nms or more.
Now given that the double row ball bearing is a fairly solid bearing, is it possible the overtightening has warped the inner race?
If one has been bodgied the other will be the same and for all I know maybe the rear bearings as well. I'm wondering if the reason I can't place the noise is that they're all stuffed!
RANT...
I HATE RATTLE GUNS.
Never has such a more butcherous tool been unleashed on cars.
My lasting memory of my apprenticeship was Old George the tester.
He walked around with a seat cover over his shoulder and a tension wrench in his hand.
Every car that went out had the wheels torqued to spec.
Yet over the years the damage from rattle guns amazes me.
How about a wheel nut cross threaded and rattled on. It sheared off when we tried to remove it.
Final bill?
20 wheel studs and nuts and labour to replace the lot because some slacker rattled the shit out of them.
END RANT.
Cheers.
It's really noticeable at 60k's and at this stage I've only had it to 70.
I've listened for it from all seats and with the armrest down and ski door opened, can't place it.
It doesn't load up with swerving as a tapered bearing would and it is not a rumble like a bearing with the case hardening breaking up.
I was told the car had new halfshafts about 5 yrs ago.
So I started diagnosis by loosening a front axle nut and checking the torque.
The spec is 200 - 260Nm. At about 260, the nut lined up with the horizontal hole in the axle.
Previously they had the hole almost lining up with the vertical hole.
My conclusion is that they rattled the nut up to around 400Nms or more.
Now given that the double row ball bearing is a fairly solid bearing, is it possible the overtightening has warped the inner race?
If one has been bodgied the other will be the same and for all I know maybe the rear bearings as well. I'm wondering if the reason I can't place the noise is that they're all stuffed!
RANT...
I HATE RATTLE GUNS.
Never has such a more butcherous tool been unleashed on cars.
My lasting memory of my apprenticeship was Old George the tester.
He walked around with a seat cover over his shoulder and a tension wrench in his hand.
Every car that went out had the wheels torqued to spec.
Yet over the years the damage from rattle guns amazes me.
How about a wheel nut cross threaded and rattled on. It sheared off when we tried to remove it.
Final bill?
20 wheel studs and nuts and labour to replace the lot because some slacker rattled the shit out of them.
END RANT.
Cheers.