Lifetime Warranty
The same battle-tested Inline Thermostat Kit that has saved thousands of Discovery 2 V8s is now officially available for the TD5 diesel.
Swap out the fragile factory plastic thermostat housing for rugged aluminum alloy, lock in steady operating temperatures with your choice of thermostat (or run without one for emergency limp-home mode), and never worry about another overheating episode on the trail or towing in the heat.
Additional benefit! Moves the thermostat from being buried down low in the engine bay to right up top where you can get to it quick if needed for a trail side repair, swap or remove thermostat elements while losing less than a cup of coolant! Check out the video – done while hot!
Born from 45+ years of real-world wrenching and proven on the Land Rover forums, this kit installs in minutes with zero special tools and zero need to drain the entire cooling system. Near-zero returns, dozens of 5-star reviews, and the exact same reliability that made the V8 version legendary — now tailored specifically for the TD5 2.5L diesel.
Whether you're overlanding across the desert, towing a trailer through the mountains, or just daily driving in hot weather, this is the upgrade that finally gives your TD5 the cooling reliability it always deserved.
Includes:
• Aluminum alloy inline thermostat housing – no degradation like factory plastic!
• Your choice of thermostat temperature (180°F standard, other options available)
• Galvanized steel hose splice to eliminate factory plastic tee
• Full step-by-step instructions with photos
• Lifetime warranty on the whole kit, housing and thermostat element! Last one you will ever buy!
TD5 owners — stop fighting the same plastic failure that plagues the V8. This is the fix the community has been waiting for.
Swap out the fragile factory plastic thermostat housing for rugged aluminum alloy, lock in steady operating temperatures with your choice of thermostat (or run without one for emergency limp-home mode), and never worry about another overheating episode on the trail or towing in the heat.
Additional benefit! Moves the thermostat from being buried down low in the engine bay to right up top where you can get to it quick if needed for a trail side repair, swap or remove thermostat elements while losing less than a cup of coolant! Check out the video – done while hot!
Born from 45+ years of real-world wrenching and proven on the Land Rover forums, this kit installs in minutes with zero special tools and zero need to drain the entire cooling system. Near-zero returns, dozens of 5-star reviews, and the exact same reliability that made the V8 version legendary — now tailored specifically for the TD5 2.5L diesel.
Whether you're overlanding across the desert, towing a trailer through the mountains, or just daily driving in hot weather, this is the upgrade that finally gives your TD5 the cooling reliability it always deserved.
Includes:
• Aluminum alloy inline thermostat housing – no degradation like factory plastic!
• Your choice of thermostat temperature (180°F standard, other options available)
• Galvanized steel hose splice to eliminate factory plastic tee
• Full step-by-step instructions with photos
• Lifetime warranty on the whole kit, housing and thermostat element! Last one you will ever buy!
TD5 owners — stop fighting the same plastic failure that plagues the V8. This is the fix the community has been waiting for.
Land Rover Discovery 2 TD5 Inline Kit
$98.00
Proven V8 Fix, Now for TD5 Diesel
The same battle-tested Inline Thermostat Kit that conquered the #1 overheating gremlin on thousands of Discovery 2 V8s is now available for your TD5 diesel.
Swap the fragile factory plastic for rugged alloy, lock in steady temps with your choice of thermostat (or delete for emergencies), and get peace of mind whether you're crawling rocks or towing heavy loads. Proven by 45+ years of off-road wrenching, near-zero returns, and a mountain of 5-star D2 success stories — this upgrade brings legendary reliability to the TD5.
Don't wait for the next overheat or for the factory plastic to fall apart. Join the fix that's already saved countless Discovery 2s.
Dig Deeper
- Top 10 Reasons an Inline Thermostat Beats the Factory Setup
- Blog Video Explainer: Quick visual on perks like no-stat runs and simplified bleeding
- Top Third-Party Install Guide: Over 16K views and real-world D2 swap
- Official Extinct Thread on Land Rover Forums: 40+ pages of owner installs and temp data
- Jump to Detailed Product Description
- Jump to Customer Reviews
- TD5 Installation Instructions (PDF)
Click here to learn how to get combined shipping with an Extinct Motorsports order
- Availability:
- Usually ships within two days
- Bulk Pricing:
- Buy in bulk and save
- Buy 10 or above and get 10% off
- Layout:
- inline-kit
Bulk discount rates
Below are the available bulk discount rates for each individual item when you purchase a certain amount
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