When you say 'on schedule' what is the schedule?
What's the mileage been between oil changes? 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

Engine oil is every 12 months/16K miles

https://topix.landrover.jlrext.com/topix/s...c&base 

So my point was what was the average mileage between changes.
In theory 16k on a high quality fully synthetic oil should be fine - though I accept it makes people uncomfortable.
I've seen analysis that says it's still providing protection at 20k and I used to change my Merc's oil at 16-18k and that was sweet at well over 200k but clearly if there's been excessive wear, then that suggests the oil is not doing its job in this case, either because it's breaking down or else it's dirty and passage ways are clogging up leading to starvation. 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

Just under 12k a year. 

Doesn’t sound excessive.
Is the 5l known for this? Design fault? 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

There were problems with tensioners apparently (piston wearing a hole in the aluminium tensioner), but was 'fixed' in 2013 with a steel insert. Mine's a 2015 car.

No sign of an oil leak or use. I've asked if the ECU has recorded anything. 

I did read somewhere they introduced a second upgrade/improvement to the timing chain tensioners etc. but I don't know if that is correct or what year/vin no. it was supposed to have been introduced. They originally changed the tensioner plungers from aluminium to stainless steel due to excessive wear.

Cheers
Col

philmw wrote:

There were problems with tensioners apparently (piston wearing a hole in the aluminium tensioner), but was 'fixed' in 2013 with a steel insert. Mine's a 2015 car.

No sign of an oil leak or use. I've asked if the ECU has recorded anything.

Thanks.

Mine look to be the later ones:

I wouldn't know if they have changed the tensioner lever, but the part number is still the same as the original modified one on the right introduced in 2013, I would have though if the lever had changed again it would be a different number, although the actual tensioner has changed number several times.



Cheers
Col

The tensioner lever/guide shown on the right of your photo was only introduced in 2015. The 2013 update used the same guide as the one on the left but used the modified plunger shown in the photos below.

The first photo shows the original INA tensioner used up until 2013.

The second shows the intermediate tensioner introduced in 2013 to try to combat or at least reduce the wear on the guide. One can see the flat end of the intermediate plunger compared to the stepped end on the first design. Both of these tensioners used the original guides.

The third photo shows the third design introduced in 2015 but some late 2014 vehicles had them fitted apparently. What can also be seen in the third photo is the new top bolt hole position. This was to change the angle and therefore mechanical advantage of the system. The new guide lever had the steel button fitted plus the bear point was shifted to suit the new tensioner.






 2016 Range Rover L494 SVR

That is a little confusing really as the tsb say's the issue was wear on the timing chain lever although it did say to replace the tensioners as well, if they didn't modify the levers it was never going to prevent the same problem reoccurring, although the part number listed in the tsb for the lever is still the current number. I did however look at a early L/R microcat parts list and it shows the new type lever was not fitted untill a much later Vin No. than the one shown on the original tsb.

Apologies to philmw as do appear to be hijacking his thread a bit.

Cheers
Col

One needs to look at the engineering number on the guides themselves to see the difference between the old, intermediate and new. I have a box of them somewhere in my workshop from replacement jobs I have done over the years so will dig them out and post a couple of photos.

I think that they introduced the intermediate design as a stop gap while they were still developing the new design. The flat end of the plunger would obviously cause less wear than the original stepped design and I have seen this on all of the intermediate engines that I have worked on. The wear was still obvious but much less than on similar mileage engines which were still using the original design.

I recently did a timing chain and tensioner replacement on a 2015 Range Rover l494 and it still had the intermediate design fitted.

But I have also done the job on other 2015 cars with the new design fitted. I guess it depends on when the engines were actually assembled. 2016 Range Rover L494 SVR