D4 SDV6 Engine Failure

**Discodicky** · 26th March 2023, 04:41 PM

Originally Posted by DiscoDB

Ford now use a generic 15,000kms or 12 months for all new vehicles they sell in Australia (except for the Transit which is 30,000kms).

Does not matter what engine is fitted so not really anything to do with it being a V6 diesel.

But given the D3 and early D4 was less than this (12,000kms or 13,000kms and 6 months), good to see Ford are still happy to push this to 12 months.

6 month oil changes really should only be required if you are running on poor quality fuel or in very hot/dusty conditions, or doing lots of short distance stop start driving.

And if doing lots of long distance driving (with good quality fuel and not in extreme conditions), then 20,000kms or 12 months is not going to cause problems.

Point taken, however given the size of the oil sump on D3/4 I don't believe it is large enough (ie, oil capacity/volume) to go out to 20,000 klms. As I've mentioned in another post/similar subject, in the earth moving industry the manufacturer I was involved with, increased their sump capacities by around 30-40% when they doubled their oil change period from 250 hrs to 500 hrs.

I understand the trucking industry also significantly increased their sump capacities and they strictly monitor their oil condition by taking regular oil samples to see how it is faring.

I reckon 6.5 litres is not enough capacity to expect the oil to maintain its integrity for 20,000 klms, but I appreciate we all have differing opinions on that.

As they say, oil is cheap compared to the possible alternative.....(

)

**shanegtr** · 26th March 2023, 07:13 PM

Originally Posted by Discodicky

Point taken, however given the size of the oil sump on D3/4 I don't believe it is large enough (ie, oil capacity/volume) to go out to 20,000 klms. As I've mentioned in another post/similar subject, in the earth moving industry the manufacturer I was involved with, increased their sump capacities by around 30-40% when they doubled their oil change period from 250 hrs to 500 hrs.

I understand the trucking industry also significantly increased their sump capacities and they strictly monitor their oil condition by taking regular oil samples to see how it is faring.

I reckon 6.5 litres is not enough capacity to expect the oil to maintain its integrity for 20,000 klms, but I appreciate we all have differing opinions on that.

As they say, oil is cheap compared to the possible alternative.....(

)

I've done lots of oil testing on my D3 - the oil itself is still fine out to 24,000km. I've posted up my previous results in another thread here somewhere

**DiscoJeffster** · 26th March 2023, 11:40 PM

Originally Posted by shanegtr

I've done lots of oil testing on my D3 - the oil itself is still fine out to 24,000km. I've posted up my previous results in another thread here somewhere

Facts will never outweigh ‘the vibe’.

**Tins** · 27th March 2023, 04:13 PM

This one didn't have time for the servicing interval to be a factor:

People knock these guys, but they are doing it and the knockers are not.

**Arch** · 28th March 2023, 08:35 AM

Originally Posted by Tins

This one didn't have time for the servicing interval to be a factor:

People knock these guys, but they are doing it and the knockers are not.

Worth a watch that one - clear as day that the problem in this case is the crank, not oil supply or poor servicing. Some interesting comments too.

**Tins** · 28th March 2023, 08:38 AM

Originally Posted by Arch

Worth a watch that one - clear as day that the problem in this case is the crank, not oil supply or poor servicing. Some interesting comments too.

Yes. I would like to see them get a metallurgical test done on that crank.

**Arch** · 28th March 2023, 09:08 AM

Originally Posted by Tins

Yes. I would like to see them get a metallurgical test done on that crank.

Agreed. Nice to see though that JLR/Ford did make some good updates to the engine... just not the important one.

It must have been a fair shock to the block/transmission etc. I hope they get a lot more kms out of the vehicle once it is back on the road.

**loanrangie** · 28th March 2023, 09:17 AM

Originally Posted by Tins

This one didn't have time for the servicing interval to be a factor:

People knock these guys, but they are doing it and the knockers are not.

I messaged Christian and asked if the previous owner pressed LR for a new engine . If it was me i would have threatened legal action, to fail at 64K its not fit for purpose and the vehicle is immaculate so not a neglected off-road basher by any stretch.

**Tombie** · 30th March 2023, 08:03 AM

Originally Posted by Arch

Worth a watch that one - clear as day that the problem in this case is the crank, not oil supply or poor servicing. Some interesting comments too.

Exactly... and this is the key problem - there seems to be metalurgical / manufacturing issues, not lubrication issues.

This is one of their good videos, although with retrospec it does demonstrate his previous hypothesis on "poor gallery design" was, as further above in this post, incorrect.

If they do get the crank tested, that will provided quite a few answers..

**Arch** · 30th March 2023, 09:09 AM

Originally Posted by Tombie

Exactly... and this is the key problem - there seems to be metalurgical / manufacturing issues, not lubrication issues.

This is one of their good videos, although with retrospec it does demonstrate his previous hypothesis on "poor gallery design" was, as further above in this post, incorrect.

If they do get the crank tested, that will provided quite a few answers..

I'd add the possibility of crank design being a problem. I note that while we've seen cranks that cracked in a couple of points along the crank, the cracked section is very thin.

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