Core Plug for Range Rover Classic 24mm - 4L 2.5 Tdi Manual ZIRCON – 525497

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This 24mm core plug (also known as a frost plug or expansion plug) seals the casting holes in the cylinder block and cylinder head left over from the manufacturing process. On 200T di and 300Tdi engines, corroded or displaced core plugs result in coolant loss, overheating, and potential engine damage - symptoms that can be mistaken for head gasket failure. Correct sizing and material specification are critical for a reliable seal. This plug is finished in Zircon, providing corrosion resistance suited to the cooling system environments found in older Land Rover engines. Key Features 24mm diameter, Zircon-coated finish for enhanced corrosion resistance Designed for press-fit installation into block or cylinder head casting apertures Compatible with OEM specifications for 200Tdi and 300Tdi engine families Multiple plugs are typically required per engine - inspect all core plugs when replacing one, as corrosion is rarely isolated to a single plug Vehicle Fitment Fits Range Rover Classic (200Tdi, 300Tdi), Series 2, 2A and 3 (2.25 Petrol), Defender 1986–2006 (2.5 NA Diesel, 2.5 Petrol, 2.5 Turbo Diesel, 200Tdi, 300Tdi), and Discovery 1 1989–1998 (200Tdi, 300Tdi). Not sure about fitment? Feel free to get in touch at [email protected] Show more