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Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

Vin ends 221992.

11th Apr 2022 9:56am

Cam-Tech-Craig

Member Since: 03 Aug 2011
Location: Gloucestershire
Posts: 16281

2015 Range Rover SVAutobiography SDV8 Loire Blue

stan wrote:
"Yes, your VIN falls within the range. It's from 195780 to 228236.

Kev"

Thank you Stan… Mine is under 😁👍😏

11th Apr 2022 2:05pm

Kot

Member Since: 10 Mar 2021
Location: broadland
Posts: 1195

Does that mean it effects 32456 vehicles?
Thats a big wow
No wonder JLR want to keep this under wraps, I wounder how many of these went to USA? Because the will hit the fan if they have several of these failures. The whole world will know

aka Toyota etc 2018 SE SDV8 4.4 Byron Blue

11th Apr 2022 2:46pm

Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

Report sent to DVSA.

11th Apr 2022 8:40pm

Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

I have examined the failed hub carrier and have compared my customer’s failed part to some of the photographs provided on this forum.
When you look closely at ALL of the photographs of the failed part when the bolted part is visible, if you check the gap of the clamping piece , in all cases that I have seen, the clamp has been over pulled. You can tell this as the gap is visibly reduced. In my opinion the clamp should have a gap of around 0.9 mm, measured with a feeler blade, when the bolt is clamped to 60Nm

On all of the cases documented here, including mine, the gap is visibly reduced. In my case the gap in the failed part measures 0.4- 0.5 mm. There’s a slight difference from top

Click image to enlarge

to bottom of the clamp.

I advise a quick test of the clamp is to measure the gap with a feeler gauge. If it’s less than 0.9mm have the clamp thoroughly inspected for cracks. On a lot of examples I have checked, one side of the clamp will break before the other side lets go.

Hopefully that will save some of you from suffering this catastrophic failure.

21st Apr 2022 1:56pm

goddo

Member Since: 27 Oct 2020
Location: south
Posts: 81

Thanks Jon,
a very useful piece of advice that will take only a minute or two to check.
If it could save a potentially fatal accident, it's worth doing.

21st Apr 2022 2:54pm

Crasher242

Member Since: 07 Mar 2019
Location: Warwickshire
Posts: 132

2014 Range Rover Vogue SE SDV8 Corris Grey

Cam-Tech-Craig wrote:
stan wrote:
"Yes, your VIN falls within the range. It's from 195780 to 228236.

Kev"

Thank you Stan… Mine is under 😁👍😏

Just caught up with this thread - just checked mine and its under too! Phew!! Current
Vogue SE 4.4 SDV8
Previous highlights
Many Mini's!
Audi S8
Audi A6 Avant (the petrol guzzling Bi-turbo)
Subaru H6 3.0 Estate
Peugeot 406 Coupe V6
Audi 80 Quattro Sport

21st Apr 2022 3:56pm

Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

goddo wrote:
Thanks Jon,
a very useful piece of advice that will take only a minute or two to check.
If it could save a potentially fatal accident, it's worth doing.

Absolutely Goddo, and it might help bring peace of mind to some owners of these premium market vehicles.
I feel that JLR could implement this simple test when they bring these vehicles in to their workshops and address this potentially fatal manufacturing flaw professionally instead of trying to pretend the problem does not exist. For now you will all have to check it yourself.

21st Apr 2022 7:44pm

AJGalaxy2012

Member Since: 11 Jun 2018
Location: Gainsborough
Posts: 1464

2012 Range Rover Vogue SE 4.4 V8 Bonatti Grey

Would corrosion not reduce the gap too? BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

21st Apr 2022 8:16pm

Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

In my opinion, the fact that the corrosion build up is inside the clamping joint and forms a solid band of corrosion, I can’t see how this would cause the gap to close and cause the joint to fracture. However, if after the clamping joint breaks on one side, as has clearly been the case in some of the cases I have witnessed, the corrosion then builds up in the crack that has gone unnoticed, it’s possible that the build up of corrosion in the fracture could potentially close the gap. That being the case it is vital to check the width of the original gap.

This image shows build up of corrosion in the area where I believe a fracture had occurred but had went unnoticed. You can clearly see corrosion build up where the fracture was.

Here is a clamping joint that had only broken on one side, but was found before the other side broke.

21st Apr 2022 9:45pm

seatosky

Member Since: 12 Feb 2022
Location: Texas
Posts: 7

Thanks Jon, this gives us something to look for. And seems to make sense as to why it only affects some vehicles.

22nd Apr 2022 3:21am

AJGalaxy2012

Member Since: 11 Jun 2018
Location: Gainsborough
Posts: 1464

Jon Byrne wrote:
In my opinion, the fact that the corrosion build up is inside the clamping joint and forms a solid band of corrosion, I can’t see how this would cause the gap to close and cause the joint to fracture. However, if after the clamping joint breaks on one side, as has clearly been the case in some of the cases I have witnessed, the corrosion then builds up in the crack that has gone unnoticed, it’s possible that the build up of corrosion in the fracture could potentially close the gap. That being the case it is vital to check the width of the original gap.

This image shows build up of corrosion in the area where I believe a fracture had occurred but had went unnoticed. You can clearly see corrosion build up where the fracture was.

My only thoughts were if corrosion occurred on the two opposing faces i.e. where you're measuring the gap, as corrosion takes place the surface area becomes coated with oxide etc which would narrow the gap? (I'm asking not making a statement).

I worked offshore as a pilot / technician of remotely operated vehicles. We had lots of corrosion issues and obviously lots of sacrificial anodes etc to protect things. When surfaces corroded spanners would no longer fit because they grown in size, quite dramatically at times. The corrosion was also really hard material, not easily removed with wire brush etc.

One thing sure, if the gap is significant and my concerns are not relevant, this is a great find. I still think the authorities should be involved and a recall done, the potential of this failure is horrific. BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

22nd Apr 2022 6:32am

Jon Byrne

Member Since: 09 Apr 2022
Location: N Ireland
Posts: 12

AJGalaxy2012. I edited this reply as I did not read your message properly on a first read. I based my assumption of over tightening based on the reduced width of the gap. But on reflection I feel I should withdraw any suggestion that over torquing the bolt would cause this. However, I’m certain that corrosion build up is significant and agree it is very much possible that the progressive build up of corrosion will close the gap in the joint. I have not yet witnessed an example of a failed clamping joint that showed a build up of corrosion within the original gap that caused the gap width to reduce. I don’t want to say it is not possible, but just that I have not seen it personally.
I have the broken clamp here with the bolt still in place. I might look at it under a magnifying lens to see if I can see corrosion in there.

I have brought an engineer onto the job to compile a report. Will be interesting to read his findings.
I’ve reported the fault to DVSA and will wait to see what the outcome of that is.

22nd Apr 2022 10:07am

154JON

Member Since: 31 Mar 2019
Location: Essex
Posts: 129

2015 Range Rover Vogue SDV8 Santorini Black

Jon i was reading your message about the 9mm gap when the balljoint bolt being tightened to 60NM as i have had both front Knuckles replaced on my L405 due to failure and was having a look on Wiki and noticed if you follow Landrover instruction to replace the knuckle it instructs the top arm balljoint bolt to be tightened to 60NM but if you look at the land Rover instructions to just replace the top arm it tells you to tighten the balljoint bolt to 70nm which is quite a difference.

22nd Apr 2022 12:51pm

154JON

Member Since: 31 Mar 2019
Location: Essex
Posts: 129

Sorry that should have been .9mm Gap

22nd Apr 2022 12:52pm

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