Question 1

Rising oil level from DPF regenerations (3.0 SDV6)

Accepted Answer

On diesels that inject extra fuel to regenerate the DPF, interrupted regenerations let diesel wash past the piston rings into the sump. The oil level rises and the oil thins, increasing wear on the turbo, timing chain and bearings. An 'oil level high' or service warning may appear.

Question 2

Air suspension faults and sagging (Discovery 4)

Accepted Answer

The air suspension can lose pressure from leaking air springs, a worn compressor or a faulty valve block, leaving the car low on one corner after being parked and showing a suspension fault message.

Question 3

Crankshaft failure on the 3.0 TDV6/SDV6 diesel

Accepted Answer

The 3.0 V6 diesel used by Land Rover and Jaguar is known for crankshaft and bearing failures, often linked to oil starvation or diluted oil. Symptoms are a knocking noise, low oil pressure warning and sudden engine failure; repairs usually mean a replacement engine.

Land Rover DiscoveryDiscovery 4

Known issues and common problems

Land Rover DiscoveryDiscovery 4

Known issues and common problems

Rising oil level from DPF regenerations (3.0 SDV6)1 solutionsHigh

Air suspension faults and sagging (Discovery 4)at 130000 km · 1 solutionsMedium

Crankshaft failure on the 3.0 TDV6/SDV6 dieselat 180000 km · 1 solutionsCritical