1336551 - Thermostat O-Ring

- €4,40

€4,40

€4,40 - €4,40

€4,40

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Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Thermostat O-Ring for the TDV6 diesel engine.

This O-ring provides the coolant seal at the thermostat housing on TDV6 diesel engines, preventing coolant from bypassing or leaking at the thermostat-to-housing interface. Replacement is recommended when removing the thermostat or when coolant seepage is present at the housing joint.

Vehicle Model Land Rover Discovery 3 2005-2009 (L319)
Land Rover Discovery 4 2010-2016 (L319)
Land Rover Discovery 5 2017+ (L462)

Fitment Notes DISCOVERY 3 2005-2009 — 2.7 V6 diesel (Lion), thermostat/housing gasket
DISCOVERY 4 2010-2016 — 2.7/3.0 V6 diesel, thermostat/housing gasket
DISCOVERY 5 2017+ — 3.0 V6 diesel, thermostat/housing gasket

Alternative Codes

1336551

In stock 4 units

3 · Gouda 1 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the Thermostat O-Ring (1336551) used for?

The Thermostat O-Ring seals the thermostat to its housing on the V6 diesel engine, stopping coolant leaking or bypassing at the thermostat joint. It fits Land Rover Discovery 3, Discovery 4 and Discovery 5 with the 2.7 and 3.0 V6 diesel. Land Rover part number 1336551.

How many O-rings do I need for a thermostat job?

You typically need one Thermostat O-Ring per thermostat on these V6 diesels. It's a single seal at the thermostat-to-housing joint. Fit a fresh O-ring whenever the thermostat is removed, since the old one usually distorts and won't reseal reliably.

Can the Thermostat O-Ring be reused?

Replace the Thermostat O-Ring every time the thermostat is disturbed. Once compressed, the rubber typically takes a set and won't seal again, risking a coolant leak. It's a low-cost item usually renewed as standard on Discovery 3, 4 and 5 V6 diesel thermostat work.

How do I confirm this O-ring fits my Discovery?

This O-ring fits Land Rover Discovery 3 (2.7 V6 diesel), Discovery 4 (2.7/3.0 V6 diesel) and Discovery 5 (3.0 V6 diesel). Match it to Land Rover part number 1336551 and confirm your engine is the V6 diesel. Petrol and four-cylinder engines use a different seal.