Thread: What did you do with or to your Disco today

Did the rear left bearing today.


Still a PITA of a job, but 100% effective in eliminating the bearing noise.

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Inner on the front.

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Inner on the rear.

What caused that?

Originally Posted by edddo

Whatcausedthat?

The bearings have either had an electric current through them, OR more likely, the car has been sitting unused for some time in a place where there is small continuous vibration that has caused the spalling. Used to run up against this vibration cause on ships, where spare electric motor bearings would need to be changed before installing. It can also happen if vibration travels to a storage area that is near a road or even worse, a railway track.

TBH, I have no idea why they wore out in that way.
The rollers and cage that associated with those collars looked fine. All gummed up with grease(and chucked out), but didn't look overly worn or damaged.
Didn't see what brand they were either. Could have been cheapies .. possibly. I got Timkens tho.

I've had 'a bearing noise' for the past 6 months or so, which I think is the rear diff pinion bearing(just a guess, but feels/sounds like it).
I got two ATBs to fit front and rear in preparation to fix the diff, that is, if it did turn out to be the pinion bearing.
Mechanic is under the pump, and has yet to rebuild my diffs .. so I've had to live with this bearing sounding noise since.

The only anomaly with that noise tho, is that occasionally it does go away .. sort of. The noise sounds more like worn mud tyres.

But then a couple of weeks ago I noticed more noise which steadily got worse, and then the other day coming through a 80k/h right hander it got much louder!
Obvious thing was a LHS bearing .. being loaded up through the righthander.

Up till about 6 months ago, D1 hardly made any noises, very smooth other than typical 300 Tdi vibes/harshness/noise. Drivetrain has always been smooth and pretty quiet.
Car hardly sits still as it's my daily driver I estimate it's sat for a day maybe only 5 times in the past 2 years .. so definitely hasn't sat for the bearings to wear out in that manner.
Interesting part is both those wear marks are inner bearings on both LHS hubs.
Spindles are usable. Have the typical wear marks, but not worn badly for the bearings to sit uneven or loosely. They need a good push to slide the hub onto the spindle, so they feel like they seat tight.

Threw some 265/75 tyres on a spare set of 16x8 rims to replace the 31x10.5's iv been running on my 200tdi disco. It has a 1.4 hi ratio transfer and was hopelessly geared with the worn 31's (measuring under 30"). Seems much better after a quick drive, wait to see what its like on the open road.

Originally Posted by Fausto79

have you got multimeter? tried to see if charging ok? maybe fault at tacho end or elsewhere in wiring. i would have thought if charging ok then not alternator issue but i'm not too sure about the alt internals so could be wrong. mine is jumping at the moment but it's charging properly. alternator is about 3 years old and its an expensive magneti marelli one.

New alternator fitted. Tacho now working. Even though the old alt was charging, the tacho side was u/s.

Thank you Heather and Mario (Roverlord) for sending the new alt so quickly.

Originally Posted by AK83

TBH, I have no idea why they wore out in that way.
The rollers and cage that associated with those collars looked fine. All gummed up with grease(and chucked out), but didn't look overly worn or damaged.
Didn't see what brand they were either. Could have been cheapies .. possibly. I got Timkens tho.

I've had 'a bearing noise' for the past 6 months or so, which I think is the rear diff pinion bearing(just a guess, but feels/sounds like it).
I got two ATBs to fit front and rear in preparation to fix the diff, that is, if it did turn out to be the pinion bearing.
Mechanic is under the pump, and has yet to rebuild my diffs .. so I've had to live with this bearing sounding noise since.

The only anomaly with that noise tho, is that occasionally it does go away .. sort of. The noise sounds more like worn mud tyres.

But then a couple of weeks ago I noticed more noise which steadily got worse, and then the other day coming through a 80k/h right hander it got much louder!
Obvious thing was a LHS bearing .. being loaded up through the righthander.

Up till about 6 months ago, D1 hardly made any noises, very smooth other than typical 300 Tdi vibes/harshness/noise. Drivetrain has always been smooth and pretty quiet.
Car hardly sits still as it's my daily driver I estimate it's sat for a day maybe only 5 times in the past 2 years .. so definitely hasn't sat for the bearings to wear out in that manner.
Interesting part is both those wear marks are inner bearings on both LHS hubs.
Spindles are usable. Have the typical wear marks, but not worn badly for the bearings to sit uneven or loosely. They need a good push to slide the hub onto the spindle, so they feel like they seat tight.

I remember when i used to get a rumbling noise when turning right. Checked bearings n turned out that the seal let water in and all the grease got washed away n bearing seized and carved big grooves on stub axle. Basically had to redo front right assembly.

Originally Posted by Fausto79

I remember when i used to get a rumbling noise when turning right. Checked bearings n turned out that the seal let water in and all the grease got washed away n bearing seized and carved big grooves on stub axle. Basically had to redo front right assembly.

A good reason to convert to oil lubed wheel bearings - if seal becomes damaged at least you'll see the oil leaking out to let you know something is amiss before bearings/stubs are damaged.