Hearing a rhythmic rumble from the rear of the car and suspect that one of the wheel bearings is on it's way out. I would expect the rumble to get louder when cornering ( often helps to identify which side is failing ), but the rumble stays constant whichever way I turn so I'll have to get it on a jack and spin each wheel to find the culprit.

 

I've watched a couple of youtube videos as to how to carry it out the replacement and it looks quite straight forward.

 

Any tips would be useful, specifically final torque figure and also is there still a requirement to tighten a further 180 degrees once torqued-up?

3 hours ago, Gammyleg said:

Hearing a rhythmic rumble from the rear of the car and suspect that one of the wheel bearings is on it's way out. I would expect the rumble to get louder when cornering ( often helps to identify which side is failing ), but the rumble stays constant whichever way I turn so I'll have to get it on a jack and spin each wheel to find the culprit.

 

I've watched a couple of youtube videos as to how to carry it out the replacement and it looks quite straight forward.

 

Any tips would be useful, specifically final torque figure and also is there still a requirement to tighten a further 180 degrees once torqued-up?

 

I had a rhythmic noise on the motorway last week, sounded like a rear wheel so I had a poke and a prod and found nothing, then 3 days later (next use) after a short drive the tyre pressure indicator advised I had a problem, and boy did I...

That's an original Pirelli (wk 2217) seems it's a common problem with 'older' tyres, tread base cracking allowing water ingress, water causes delamintation and a blister that fails pretty soon after, and then the carcass is exposed and you get this....

Tyre dealer had dozens of tyres with tread failure - some 2yrs old with 8mm tread, Pirelli and Avon well over-represented in his pile of similar failures!

 

Moral is that when you check your tyres (and I do) make sure you do it with a raised wheel, or roll car forward half a rev to ensure you can feel all the tyre.

 

MOT/service in July, no advisories (but tread at 4-5mm so think of changing was all), I check inside and outside edges front and rear frequently, tyres were checked before we set off on this journey from chester to norfolk. Towing the caravan on the original journey might have got really interesting if we'd gone much further.

Rythmic rumbling could be saw tooth wear on rear tyres.

If you pass your hand counter clockwise on rear right tyre / clockwise on rear left tyre, you’ll easily feel the saw tooth effect.

Switching front / rear wheels should solve the problem within 500km. If the saw tooth is still a bit present, then switch left and right front wheels. It should disappear within another 500km.

Just have a look on cardiagn.com and download official workshop manual, espacially « wheels & tyres » chapter, where the solution above is well discribed.

45 minutes ago, Bap33 said:

If the saw tooth is still a bit present, then switch left and right front wheels.

Unless you have directional tyres fitted.

 

 

46 minutes ago, Bap33 said:

If you pass your hand counter clockwise on rear right tyre / clockwise on rear left tyre, you’ll easily feel the saw tooth effect.

Especially on the inside edge of the tyres.

 

 

Thanks, AG Falco

I had saw tooth wear on a Superb mk2 facelift, on the inner edges of the rear tyres as already mentioned in a previous post, this does give a rythmic rumble as described by the OP

 

 

Edited 24 September, 20223 yr by cnc

20 hours ago, AGFalco said:

Unless you have directional tyres fitted.

Of course ! 😉👍

This thread made me go out and have a thorough look at my tyres today.

 

No uneven wear at all, so quite happy with that, however on looking for the manufacturing date stamp I found that one tyre didn't have the week no./year no. panel.

It was only then that I realised I could see the word "inside" on the outside of the car. The bloomin' tyre was fitted the wrong way round!

 

A quick check of the paperwork showed that the NSR tyre had been off for a puncture repair in June and that's when it must have happened.

So I have done about 3000 miles with the damned tyre going backwards!

I will nip round tomorrow to have words.

 

That's the 3rd time I've used this particular National tyre depot.

1st time I found, some months later, that the puller for the plastic nut covers was missing.

2nd time I found, some months later, that one of the plastic nut covers was missing.

3rd time - they do this!

Don't think I will be using them again......

 

But thanks to the contributors to this thread, without which I would probably never have spotted this!

Thanks for all your replies.

 

With gratitude I can now report that Bap33 was right on the money with the saw-tooth tyre theory.😀

 

I swapped the tyres diagonally across the car and the rumble has now moved to the front end with no more booming from the back.

 

While doing this I spotted that both rear shocks are leaking so I suspect this has had an influence. ( they were OK when last MOT'd in June )

 

I'll post a couple of pics & tread depth numbers as & when I've got a bit more time. 

 

  

OK, got a bit of time to post some pics and further information.

 

Tyres are Slovenia's finest Dunlop SportMaxx RT2 (94Y)

 

Picture is of one of the rumbling rear tyres. Inside track is left, outside is on the right of the pic.. 

 

As per NJRJs post there seems to be the beginnings of the tread base cracking on the inner radial channel. This is apparent on both rear tyres which are approx 2 years old / 50k miles.

 

Not shown clearly in the photo, the centre radial tread has worn down slightly more than the two adjacent radial treads by 0.6mm, indicating running over-inflated. ( I have been inflating all the tyres to ECO option ). Also when sat on the floor the wheel/tyre doesn't stand vertically, it leans inward by about 15 degrees.

 

 

Tread depths measured in each radial channel from inside to outside ( L - R ) were 4.31mm - 3.80mm - 4.13mm - 5.19mm

 

As mentioned in an earlier post, I spotted the shocks were both leaking ( now replaced with new pair of Sachs ) and when checking the rear tyres, some of the inside tread segments are noticeably more worn than others, which I believe is called 'cupping'

 

After doing a diagonal front-to-back swap, the rumble has now moved to the front of the car. Can I expect the rumble to reduce as the tyres wear further, ie will the less worn segments ultimately catch up with the 'cupped' segments?

 

 

 

4 hours ago, Gammyleg said:

Can I expect the rumble to reduce as the tyres wear further

 

Not always.

 

If you don't want this to happen again then use these guidelines.

 

Swap tyres from left to right every 6 months. ( as long as they are not directional tyres).

Fit new tyres in pairs to the rear.

If the fronts were the worn out ones then swap the older rears to the front also swapping diagonally at the same time.

 

 

4 hours ago, Gammyleg said:

centre radial tread has worn down slightly more

 

Do you do a lot of longer high speed journeys?

 

Thanks, AG Falco

 

Hi, I have the same rumbling noise and caused by the same over-inflating. I also swapped my tires and it’s now on the front.

 

I had a 1000km trip this summer with kids, granny and a lot of baggage. So I inflated the rear tires to 2.8 bars, fronts to 2.5.. I was driving mainly on highways.

 

Some time when I returned back, I noticed the rumbling on the rear and thought it’s wheel bearing, because I had to change 2 for 100k km.

 

Then I found this thread in the forum and decided to swap the tires regardless of the lack of visual indication of uneven wear.

 

The tires are 2 year old Goodyears Efficientgrip Performance 2 with 40k km. Let’s see are they going to get silent for 500-1000km as the Skoda book says.

4 hours ago, fr1nklyn said:

have the same rumbling noise and caused by the same over-inflating

 

The over inflation does NOT cause the rumbling noise, that comes from the saw tooth inner edge of the ( rear ) tyres.

 

Thanks, AG Falco

@AGFalcoNot sure what caused it but I’m almost 900km after the tires switch and the noise almost disappeared. I thought it’s a bad bearing..

Thanks a lot guys!

 

I believe the remaining noise remained from the bad isolation of the car(other O3 owners also complain about it).

On 08/10/2022 at 17:36, AGFalco said:

Do you do a lot of longer high speed journeys?

Yes, daily commute is 50 miles each way, 95% motorway between 60 - 70 mph.

Sat. 65miles 80% motorway, returning Sun same distance & route.

2 hours ago, Gammyleg said:

Yes,

 

Lots of high speed motorway driving can wear the centre of the tyres quicker.

 

Where as lots of hard cornering can wear the edges of the tyres quicker.

 

 

 

On 23/10/2022 at 15:12, fr1nklyn said:

Not sure what caused it

Low pressure, alignment out, tyres not rotated would be three reasons.

 

 

Thanks, AG Falco

Well I've run on these tyres for a further 10,000 miles and the rumble still persists so not able to 'wear through' the uneven tread depth/scalloping problem. It may have reduced slightly over time but as I drive it every day it's difficult to tell - the other half could never hear it, even when at it's noisiest...wimmin!

 

Anyhoo, I'm down to the low tread markers now so have just invested in two new Dunlop Sport Maxx replacements. 60,000 miles ago ( July 2020 ) these cost me £207 for the pair, today it's cost me £273, and that was after a lot of hard searching. That's inflation for you, cheers Liz.

 

 

I'm getting the same for the last few months, I've had the alignment done previously so not that.

 

I was assuming it will either to tyre (it's had a MOT in December so i don't think its the saw tooth effect). most likely to do with the wheel hub. 

Would be worth checking the shocks for leaks etc. That was the root cause of my uneven tyre wear I believe.

After a 200 mile trip today my wife and I noticed a rumbling noise when we we driving around side streets. It's coming from the lhs but unsure if back or front.

Only hear it from about 10 to 25 mph. Not very loud. Car is full stuff for holiday and so more weight than usual in back. Braking and steering the car makes no difference. Still there with clutch depressed. Doesn't seem to change pitch with speed.

Car was serviced not that long ago. 

We're taking a ferry to France tomorrow. Wondered whether to postpone. No garage open tomorrow and early crossing. I'm thinking we should keep speed down and monitor it to see if it gets any worse and get it checked at a Skoda agent sooner rather than later if it does. We have a maintenance plan with Skoda.

Car's a Mk3 Octavia. I'm wondering if it's new or I didn't notice it before.

Edited 1 April, 20233 yr by MichaelTL

Decided to postpone. Hoping Richmond Škoda Portsmouth will be able to check it Monday. We've got a long drive in France.