Performance Water Pump & Thermostat Kit for Land Rover LR4 (2010-2016) 3.0L

Heavy-Duty Water Pump & Thermostat Cooling Kit for 2010-2016 Land Rover LR4 (L319)

What it Does: The Performance Water Pump & Thermostat Kit replaces failure-prone factory cooling components on the 2010-2016 Land Rover LR4 to prevent catastrophic coolant loss and regulate operating temperatures under load.

The Stock Land Rover LR4 Cooling System Vulnerabilities

The factory cooling assembly on the L319 chassis relies heavily on brittle, seam-welded plastic coolant crossover pipes and composite thermostat housings. Under cyclical thermal stress and elevated system pressures generated by the supercharged AJ126 and AJ133 powerplants, these polymer pipes degrade, embrittle, and hairline-crack at the seam lines beneath the supercharger manifold. Concurrently, factory water pump bearings and mechanical seals are known for premature weep-hole leakage, which starves the engine of coolant and leads to localized heat soak, warped cylinder heads, and head gasket failure.

The Engineering Solution

This comprehensive overhaul kit addresses OEM polymer degradation by substituting vulcanized failure points with reinforced cast aluminum crossover pipe construction and an upgraded mechanical water pump. Replacing the thermal-stressed plastic front crossover with corrosion-resistant cast aluminum eliminates split-seam blowouts, while the precision-calibrated thermostat assembly with an integrated sensor ensures accurate coolant flow metering across the radiator core. Complete with upgraded copper-reinforced bleed hardware and synthetic EPDM plumbing, this solution delivers reliable fluid transfer without continuous risk of unmonitored hydraulic pressure drop.

What's Included

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

Technical Specifications

Compatibility

• 2010-2016 Land Rover LR4 3.0L Supercharged V6 (AJ126)
• 2010-2016 Land Rover LR4 5.0L Supercharged V8 (AJ133)

Frequently Asked Questions & Fitment Warnings

Does this fit the L319 LR4?

Yes, this is a direct fit for the 2010-2016 Land Rover LR4 equipped with the AJ126 3.0L supercharged V6 or AJ133 5.0L supercharged V8 engines. Does not fit naturally aspirated engines; verify displacement and induction setup before purchase.

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

Yes, a vacuum-assisted coolant refill and complete manual bleed cycle via the included copper bleeder screw are required to clear air pockets from beneath the supercharger manifold.

The Land Rover Standard

Engineered to meet demanding European utility tolerances, this cooling package is designed to ensure factory fitment, reliable sensor communications, and complete operating reliability without triggering Check Engine lights or fault codes.