Thread: Discovery 4 stopped. Any opinions on reason please?

My thoughts it could be a snapped crank.

Land Rover are aware of the issue, but still deny it Jaguar Land Rover recall TDV6 engined vehicles

Did it sound like this Google Photos

This D4 had an oil change 200-500 miles before the crank snapped. MY12 engine had done 123,000 miles and very well maintained. Used as a pilot vehicle in Europe.

Kelvo, No it didn't sound like that. More of a constant, grinding and screeching sound.
Given the publicity around the issue, a broken crank was the first though I had but:
- I was able to restart the engine,
- There was no external evidence. My experience with race cars :-( is that a catastrophic bottom end failure usually results in a ventilated block or sump. The Disco was parked in a shed on a concrete floor last night, and there was no evidence of any fluid on the floor, and
- I forgot to mention this, but I have an IID tool and after I had stopped, before I restarted the engine I checked for error codes. There were none.
Also, my reading suggests the broken crank was more common with 2.7s and TDV6 3.0s.
Thanks for your feedback.

There doesn't have to be any external evidence of the crank snapping unless it has decided to leave the block, unlikely to be the oil pump as the failure is confined to the 2.7 unless it is an unrelated pump issue.
Cam chains that drive the 2nd cam have been known to fail, this is more likely as the engine isn't totally stuffed if they go.

Interesting discussion on Disco3 of improperly installed oil filters on the 2.7D leading to cooked (oil starved) engines.

Changes were done by inexperienced independents who did not locate the filter properly before screwing on the cap. Filter gets crushed.

Trick for the inexperienced.

I think the filter fit is different on the 3.0D but worth checking especially if recently after a service.

In most situations the failure would be put down to just another blown engine and not the improperly fitted filter.

The 3.0 filter and housing were changed to not use a locating spigot and therefore avoid misfitted filters.

The LR dealer has reported the failure as a spun crank bearing, and a new engine less peripherals is being supplied and fitted under warranty. Here's hoping that no debris has got past the oil filter to the turbo bearings.
I was aware of the history of bearing issues and resulting crank failures with this family of engines, but had believed it was mainly a problem with the TDV6 version, and much less so with the SDV6 variant.
We should have the car back in just over a week, and I look forward to getting back on the road.

Fortunate outcome.

You would think the 3.0D had an entirely new re-engineered bottom end but I suspect not.