Cup Plug for Defender (1986 – 2006) – 602152

Thomas Performance Ltd Verified independent store

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This cup plug (also known as a core plug or freeze plug) seals the casting holes in the block left over from the manufacturing process on Land Rover V8 petrol engines. On the Rover V8, corroded or displaced cup plugs result in coolant loss directly from the engine block, often causing overheating before the leak source is identified. Correct replacement with a properly sized plug is essential to restore a reliable coolant seal and prevent ongoing internal corrosion. Key Features Steel cup-type construction designed to press-fit into the engine block casting aperture Must be installed using a suitable cup plug driver to ensure correct seating depth and a leak-free seal Matches OEM specification for Rover V8 engine blocks across multiple displacement variants Multiple cup plugs are present on each engine block - inspect all plugs when replacing one, as corrosion typically affects several simultaneously Vehicle Fitment Fits Defender (1986–2006) 3.5L and 4.0L V8, Discovery 1 (1989–1998) 3.5 and 3.9 V8, Discovery 2 (1998–2004) 4.0 and 4.6 V8, and Range Rover Classic 3.9 and 4.2 V8 petrol engines. Not sure about fitment? Feel free to get in touch at [email protected] Show more