Valve Guide for Defender (1986 – 2006) Cylinder Head - Inlet – 568686

Thomas Performance Ltd Verified independent store

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This inlet valve guide is a precision-fitted bush installed in the cylinder head that controls the lateral movement of the inlet valve stem, maintaining correct valve-to-seat align ment and controlling oil consumption. On the 2.5 Petrol Defender and 2.25 Petrol Series 3 engines, worn valve guides cause increased oil burning, blue exhaust smoke, and poor sealing between the valve and seat, leading to compression loss and accelerated seat wear. Correct replacement restores proper valve stem clearance and ensures the inlet charge is sealed efficiently during combustion. Key Features Inlet-specific guide dimensioned to suit the inlet valve stem diameter on Land Rover 2.5 and 2.25 Petrol cylinder heads Requires pressing into the cylinder head and reaming to final clearance after fitment Manufactured to OEM specification for correct interference fit within the head casting Cylinder heads typically have one guide per inlet valve - count cylinders to determine quantity required; replace valve stem oil seals at the same time Vehicle Fitment Fits Land Rover Defender (1986–2006) with the 2.5 Petrol engine and Land Rover Series 3 with the 2.25 Petrol engine, inlet valve guide application. Not sure about fitment? Feel free to get in touch at [email protected] Show more