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

Originally Posted by Disco4Dave

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.

All the diesel V6s can have this problem. Doesn't seem to matter how often oil and filters are changed. One of the reasons why a prefer the petrol V8.

Originally Posted by Disco4Dave

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.

Wow. To use an overused expression these days, you dodged a bullet!
Glad the dealer stepped up with the warranty replacement, but I would be concerned with bits of metal in the ancillaries and tubes.

There have been cases of D5 engines also failing so the issue is still real sadly.

Originally Posted by DiscoJeffster

There have been cases of D5 engines also failing so the issue is still real sadly.

I was in at my local LR dealer a couple of weeks ago. (Mine was off the road for a month having a cracked inlet manifold replaced under extended warranty (yay).) The service manager pointed to a MY14ish D4 parked next to mine. He said it had an injector get stuck open, which hydraulic'd the cylinder and spat a leg out of bed. New engine time... :-(

Originally Posted by Disco4Dave

Here's hoping that no debris has got past the oil filter to the turbo bearings.

If a turbo is discovered damaged when the engine is started then the turbo(s) will have to be replaced as part of the repair. However unless the turbos had been working hard at the time then they should be OK even if oil pressure was reduced substantially.

Originally Posted by Graeme

If a turbo is discovered damaged when the engine is started then the turbo(s) will have to be replaced as part of the repair. However unless the turbos had been working hard at the time then they should be OK even if oil pressure was reduced substantially.

Thanks Graeme. Unfortunately I was towing approx 1.5t uphill when the engine failed, so there would have been some load on the engine.
The dealer technician says they will clean and inspect the turbos before refitting and then testing. Hopefully any issues will be apparent.

The Disco is back, with a new engine.
They reused most of the peripherals from the old engine, including the turbos.
When cut open, the old oil filter contained some shrapnel. From that I take that the oil pump was still working as the crank bearing failed, and that there must be some risk to the peripherals such as the turbos. They assure me that the peripherals were inspected and tested before being refitted.
I was told by the dealer that the new engine would have a 1 year warranty, but after querying that directly with JLR I learner that in the case of a warranty replacement, it is only covered by the balance of the factory warranty. In my case that is 2 weeks from now. JLR said that if any of the peripherals failed in the near future, after the factory warranty expired, they would "take care" of me. They would not be more explicit on what that means.
There are 2 matters concerning the engine change work that concern me.
The car was ready a day later than planned as it had a coolant leak after the engine swap. This was due to a pinched o-ring on the water pump transferred from the old engine. My concern here is that this may indicate a lack of care when fitting the pump.
The other matter is minor but still concerning. The car has an ARB bullbar which of course needed to be removed to get the body off. That bullbar hasyellow blinkers and white DRLs. When collecting the car, I did a walk around with the engine running and noted that on one side, the yellow blinker was on while the white DRL was not. Putting on the blinkers resulted in the DRL flashing. So, they have mixed up the wiring on those lights on one side. No big deal. But surely someone should have noticed that in the 5 days they had the car after the engine swap was completed. To me it shows a lack of attention and care.
The car does to a LR indi next week for an inspection to catalogue any issues to raise before the warranty expires. I wonder what they will find!

Thats interesting about turbo inspection as when i was fault finding a turbo issue with my l322. The turbo specialist told me he would not dismantle turbo to inspect if there were any faults without replacing seals. So you think they would at least replace seals or not inspected thoroughly.