Performance Water Pump & Thermostat Kit for Land Rover Range Rover (2010-2020) 5.0L

Heavy-Duty Cooling System Overhaul Kit for 2010-2020 Land Rover Range Rover (L322 / L405)

What it Does: The Performance Water Pump & Thermostat Kit replaces brittle factory plastic coolant runners and wear-prone water pump components on the 2010-2020 Land Rover Range Rover to prevent catastrophic coolant loss and regulate engine operating temperatures under load.

The Stock Land Rover Range Rover Thermal Management Weakness

Factory cooling systems on the AJ133 5.0L Supercharged V8 and AJ126 3.0L Supercharged V6 suffer from notorious failure points: the sonic-welded, factory plastic coolant crossover pipes routed beneath the supercharger manifold. Continuous heat-cycling embrittles this plastic, leading to sudden seam separation, rapid coolant evacuation, and severe cylinder head warping. Furthermore, standard composite impeller bearings degrade over time, leading to cavitation, water pump shaft play, and unmonitored thermal spikes.

The Engineering Solution

This comprehensive service kit addresses inherent factory flaws by upgrading the vulnerable front coolant cross-over manifold to seamless aluminum construction. Engineered with high-strength metallic piping and heavy-duty brass/copper bleeder fittings, this kit eliminates plastic fatigue at critical pressure points. Paired with an OE-specification direct-drive mechanical water pump and a precision-calibrated thermostat with an integrated thermal sensor, it restores flow continuity and optimal heat rejection across the supercharger intercooler and engine core loops.

What's Included

• 1 Thermostat with Sensor
• 1 Aluminum Coolant Crossover Pipe Assembly
• 1 Mechanical Water Pump
• 1 Thermostat Outlet Hose with Copper Fittings
• 1 Copper Bleeder Screw & Crossover Plug
• 1 Heater Outlet Hose

Technical Specifications

Compatibility

• 2010-2012 Land Rover Range Rover (L322) 5.0L V8 Supercharged
• 2013-2020 Land Rover Range Rover (L405) 5.0L V8 Supercharged
• 2014-2020 Land Rover Range Rover (L405) 3.0L V6 Supercharged

Frequently Asked Questions & Fitment Warnings

Does this fit the L322 / L405 Range Rover?

Yes, this is a direct fit for the 2010-2020 Land Rover Range Rover equipped with the AJ133 5.0L and AJ126 3.0L Supercharged engines. Does not fit naturally aspirated 5.0L engines.

Do I need to bleed the cooling system after installing this kit?

Yes, a full vacuum purge and coolant system bleed are mandatory during installation to avoid localized air pockets across the supercharger cooling circuit.

The Land Rover Precision Standard

Maintaining high-output European aluminum V8 powerplants requires tight thermal tolerances and zero-leak integrity. This kit eliminates factory plastic vulnerability to protect critical engine tolerances and prevent check-engine warnings or catastrophic overheating on the road.