Nicked from the Disco forum but still applies...

Quote:

Reference SSM71816

Models

Discovery 4 / L319
Discovery 3 / L319
Range Rover / L405
Range Rover Sport / L494
Range Rover Sport / L320

Title Crankshaft/Crankshaft Bearing Concerns - TDv6 Diesel Engine
Category Engine
Last modified 06-May-2014 00:00:00
Symptom 499000 Basic Engine

Content
Issue:
Crankshaft/crankshaft bearing failure - TDv6 Diesel Engine.
Cause:
Low incidence of crankshaft failure are being encountered, caused mainly by incorrect location of the main bearing shells during assembly, or through rotation of the shells during normal use. A new procedure has been implemented to ensure:
- more rapid resolution of customer concerns, and
- greater visibility of failure modes in order to improve repair process and parts delivery.

Action:
For any suspected crankshaft/bearing failure, please contact your local Dealer Technical Supportor FRED team for details of the enhanced customer handling procedure.
The list below summarises typical symptoms of crankshaft/bearing failure, but please contact your DTS/FRED team if in any doubt as they will be pleased to offer assistance:
· Crankshaft is seized, engine cannot be turned either via starter motor or crankshaft pulley bolt.
· Oil sump or engine cylinder block is holed, with oil leakage and/or metallic debris found on engine under-tray.
· Engine makes a loud ‘rumbling/knocking’ sound when running which worsens as the engine is placed under load. The engine oil pressure warning light may flash or be continuously illuminated, especially at low engine speeds.

 FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

That's not very good,,, sounds like a complete new engine required to fix this if your unlucky enough to have one of the affected engines.

It will be interesting to see how many were affected by this as the notice is a bit vague and does not even give a true solution, I am just assuming its a new engine required.