Suitable for every Land Rover
Every model. Every generation.
Range Rover
Range Rover Sport
Defender
Discovery
Velar & Evoque
FreelanderLand Rover plastic thermostat housings crack when the coolant degrades. The fluid is the cheapest part of the cooling system — if it ages out, everything downstream pays the price. Service it before it fails.
Land Rover marketing says the coolant is good for 10 years or 240,000 km. It's not. Real-world testing on these cars shows the corrosion inhibitors break down at around 4 years, and once they do, the acidity climbs and starts eating plastic thermostat housings, water pump seals, and aluminium passages.
Every cracked thermostat housing we've replaced — and we've replaced a lot — came out of a car with old coolant in it. A $300 flush every 4 years prevents a $2,000 thermostat housing job, a $3,500 water pump job, or worst case, head-gasket damage from overheating.
That's the Land Rover service-brochure line. Real-world inhibitor breakdown happens at year 4. By year 6, the acidity is high enough to eat plastic and aluminium.
A coolant flush costs less than a tank of fuel. A failed thermostat housing costs $2,000. A head gasket from sustained overheating, $8,000. Service the cheap thing on schedule.
Drain, system flush, refill with OEM-spec long-life coolant, bleed and pressure test. Every 4 years on these cars — not the 10-year marketing number.
Cracked or leaking plastic housings replaced with OEM upgrade where available. Common Range Rover, Sport, Discovery fault.
Bearing inspection, seal check, replacement at sign of seepage. Catch a weeping pump before it strands you on the M2.
TDV6 / SDV6 specific — cracked EGR cooler dumps coolant into the exhaust. We replace and pressure-test to confirm.
Every cooling hose checked for swelling, soft spots, or weeping joints. Replace clamps and hoses before they pop.
Slow coolant loss with no visible leak? UV dye + pressure tester finds the source. Hairline cracks identified before they become breakdowns.
Range RoverRange Rover SportDefenderDiscoveryVelar & EvoqueFreelanderCooling faults follow a few common patterns on Land Rovers. Catch them at this stage and they're cheap fixes — not breakdowns.
Thermostat housing crack or weeping water pump. UV dye + pressure tester finds the source in 20 minutes.
Heater core or EGR cooler. If it's the EGR, you'll see coolant in the exhaust on cold start.
Stuck thermostat, failing water pump, or air in the system after a previous service. Bleed and pressure-test confirms which.
Inhibitors have broken down. You're already eating the aluminium — flush immediately.
Air pocket from an under-bleed, or a stuck heater valve. Common on Land Rovers after a careless flush elsewhere.
Head gasket or EGR cooler depending on the car. Pressure test + scope finds which before we condemn anything.
Coolant entering the cylinders — head gasket or cracked head. Don't keep driving — pressure test on the lift.
The housing is cracking. Replace before it gives way — we have housings in stock.
Drain the old coolant, inspect for rust or sediment, check the radiator and hoses for swelling or leaks. We tell you everything we see before we refill.
System flushed with clean water, refilled with OEM-spec coolant in the correct concentration, bled at every bleed point. No air pockets, no shortcuts.
Pressure-test the system to OEM spec, hold and watch the gauge. Any drop, any seepage, we find it before you leave the workshop.
"Found a hairline crack in my Discovery's thermostat housing during a routine service. If we'd ignored it, it would've split on the highway. Replaced it the same day with the OEM upgrade housing, flushed the coolant, all sorted. Saved me from being stranded somewhere on the F3."
Coolant service is the cheapest mechanical work you'll ever pay for — and it prevents the most expensive bills on a Land Rover. Book it.