Performance Water Pump & Thermostat Kit for Land Rover Discovery (2017-2020) 3.0L

Heavy-Duty Cooling System Overhaul Kit for 2017-2020 Land Rover Discovery (L462)

What it Does: The Performance Water Pump & Thermostat Kit replaces brittle OEM plastic coolant routing lines and aged pump assemblies on the 2017-2020 Discovery to maintain steady operating temperatures and eliminate catastrophic coolant loss.

The Stock Land Rover Discovery Plastic Pipe Degradation

The factory cooling architecture on the **L462** chassis equipped with the **AJ126** 3.0L supercharged V6 relies on molded two-piece plastic crossover pipes. Repeated heat cycling causes the bonded plastic seams to fatigue, warp, and split directly beneath the supercharger manifold. Compounding the issue, the OEM plastic bleeder plugs and quick-connect fittings become micro-fractured under standard 15-20 PSI operating pressures. Unchecked seepage often leads to sudden catastrophic fluid loss, head gasket failure, and warped aluminum cylinder heads.

The Engineering Solution

This kit resolves OEM material vulnerabilities by substituting fragile composite lines with precision-machined aluminum coolant crossover pipes. Aluminum construction prevents heat-soak embrittlement and holds rigid structural integrity under extreme thermal load. Accompanied by heavy-duty copper bleed screws, reinforced thermostat outlet hoses, and a high-flow water pump, this package is designed to ensure reliable hydrodynamic circulation, mitigating hotspot development in the engine valley. The direct replacement thermostat with integrated temperature sensor ensures precise ECU thermal feedback without triggering check engine lights.

What's Included

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

Technical Specifications

Compatibility

• 2017-2020 Land Rover Discovery 3.0L Supercharged V6 (**AJ126**)

Frequently Asked Questions & Fitment Warnings

Does this fit the L462 Discovery?

Yes, this is a direct fit for the 2017-2020 Land Rover Discovery equipped with the **AJ126** 3.0L supercharged engine. Does not fit naturally aspirated engine configurations.

Is intake manifold removal required for installation?

Yes, replacing the front and rear coolant crossover pipes requires unbolting and lifting the supercharger assembly to access the valley cooling ports.

The Land Rover Caliber

Engineered to meet stringent European cooling tolerances, this metal-upgraded kit prevents common fault codes and maintains peak thermal efficiency under continuous highway hauling and sustained off-road operation.