Cooling systems on Range Rovers are pushed to their limits every summer. Plastic coolant crossover pipes on the 5.0 V8, thermostat housings on the TDV6 and auxiliary water pumps on the Ingenium engines are all known wear items, and a small leak can become a warped cylinder head within minutes if it is ignored.
We pressure-test the entire system, inspect every hose and pipe with a borescope, and check for combustion gases in the coolant before diagnosing. Repairs use genuine or upgraded aluminium replacement parts where available, and we finish with a vacuum fill so there are no air pockets.
Cooling System & Overheating on the Land Rover Defender
Whether it is a classic 110 or the new L663 Defender, this is the vehicle that defines the brand. We look after both, from TD5 injector looms to the very latest D300 mild hybrid and the P525 V8.
Engines we cover on this model: 2.0 Ingenium, 3.0 Ingenium P400 MHEV, 5.0 V8, 3.0 D300 diesel, classic TD5 & Puma. Production 1983 – present (L663 & classic). Faults we see most often on the Land Rover Defender include air suspension on l663 after off-road use, ingenium oil dilution on short journeys, classic td5 injector harness oil contamination, and each is diagnosed with the model-specific procedure before any parts are recommended.
What the service includes
- Cooling system pressure and combustion-gas test
- Radiator, expansion tank and hose replacement
- Water pump and auxiliary pump replacement
- Thermostat and housing replacement
- Coolant crossover pipe upgrade for V8 engines
- Vacuum coolant fill and bleed
Signs you need it
- Temperature gauge climbing in traffic
- Coolant level dropping with no visible leak
- Sweet smell or steam from the engine bay
- Heater blowing cold while engine is hot
- Low coolant warning on the dashboard
How we work
Every job begins with a proper diagnosis on the lift and on Land Rover's diagnostic platform. You receive a written report, photos and a fixed price on WhatsApp before any work begins. Genuine or OE-equivalent parts are used, every repair carries a written warranty, and the vehicle is road tested before handover.
Frequently asked questions
Is overheating serious on a Range Rover?
Very. Aluminium engines tolerate very little overheating before the cylinder head distorts. Stop the vehicle and call us on WhatsApp for recovery.
What coolant do you use?
Genuine Land Rover long-life coolant mixed to the correct ratio. Mixing coolant types can cause corrosion and gelling.
How often should the coolant be changed?
Every five years or 150,000 km, or sooner if the system has been opened for a repair.