
"ENGINE OVERHEATING" in the message centre
On the 2015 Range Rover, the red engine temperature lamp lights and the message centre reads "ENGINE OVERHEATING". The driver stops as soon as it is safe.
On the AJ126 V6 in the L405 and L494, a leak at the thermostat housing seam is one cause. A severe overheat can then damage the thermostat itself. We replace the housing and repair every other cause of the overheat.

A "Coolant Low" warning on the instrument panel
Ingenium six-cylinder engines and the 4.4 litre V8 petrol of the L460 and L461 show "Coolant Low" when coolant escapes from the engine circuit. We find the joint, hose or pipe that leaks and replace it.

Loud cooling fans on an Ingenium 2.0 litre petrol
Fan noise reaches the cabin on the Ingenium 2.0 litre petrol in the Evoque (L551), Velar (L560), Range Rover (L405) and Range Rover Sport (L494). A coolant diversion shroud inside the variable coolant pump stops moving to its requested position. The powertrain control module then runs the fans at high speed to prevent overheating.
The codes P2B61-73 and P26CB-72 mark this fault, and cooling performance degrades over time. JLR's fix on these models is a powertrain control module update. We read the codes, and a Land Rover dealer loads the update.

Engine rattling at the front of a 5.0 litre V8
On the AJ133 5.0 litre V8 in the L322 Range Rover and L320 Range Rover Sport, chain noise means the chain has lost its tension. The old-design tensioner blades wear without a steel insert. JLR's revised blades carry a steel insert against wear, with a tensioner redesigned to match.
We replace both pairs of tensioners and blades in one job, because a repair that leaves 1 pair in place brings the noise back.

Rumbling or knocking from a 3.0 TDV6 under load
A 3.0 TDV6 diesel in the L405 or L494 that rumbles or knocks harder under load has main bearing shells that have rotated. The oil pressure warning flashes or stays lit, and the crankshaft can seize. We open the bottom end, then replace the crankshaft and bearings or the engine.

Engine oil leakage under a 3.0 TDV6
Oil under a 3.0 TDV6 looks like a sump gasket leak, but on these engines the oil starts higher up. The 3 sources, in order, are the turbo oil return hose O-ring, the camshaft cover gasket and a loose secondary turbo V clamp. We trace the oil to its point and renew the O-ring or gasket, or tighten the clamp.