PYX000040 Genuine O-Ring Water Manifold Large Tube L322

This Genuine Land Rover O-Ring, part number PYX000040, seals the connection between the larger rigid coolant tube and the water manifold on the 4.4-liter M62 V8 petrol/gas engine found in the Range Rover L322 built between 2003 and 2005. The ring measures approximately 34.2mm (1.35 in) in diameter with a 4mm (0.16 in) cross section, sealing this junction of the cooling system to prevent coolant seepage as the engine cycles through heat and pressure changes over time. Because this O ring sits at a joint that is exposed to constant thermal cycling, it is a common point of hardening and eventual leakage on these Rovers as they age, making it a sensible small parts replacement any time the coolant manifold or surrounding hoses are serviced. As a Genuine component, this O ring is manufactured to the same specification used in original production, giving confidence in both material quality and long term sealing performance. It installs quickly once the relevant intake components are moved aside for access, and is often replaced alongside the neighboring water manifold O rings and gaskets during a full cooling system refresh.

Part Number: PYX000040

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[FAQ]
What does this O ring seal on the L322 Range Rover?

It seals the joint between the larger rigid coolant tube and the water manifold on the 4.4-liter M62 V8 engine used in the Range Rover L322 from 2003 to 2005.

Is this a Genuine Land Rover part?

Yes, this is a Genuine Land Rover component manufactured to original specification rather than an aftermarket equivalent.

Is this something I should replace during other cooling system work?

Yes, since it sits at a heat exposed joint that commonly hardens over time, many owners replace it alongside nearby water manifold seals during any cooling system service.