Thermostat - 88 Degrees for Defender (1986 – 2006) 88 Degrees - Seal is Included – ERR3291F

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The ERR3291F is an 88-degree thermostat designed for Land Rover 300Tdi engines, regulating coolant flow between the engine and radiator to maintain optimal operating temperature. O n the 300Tdi, a failed or incorrect thermostat commonly causes overheating, poor heater output, or extended warm-up times due to the engine running outside its designed temperature range. Replacing with the correct 88-degree rated unit ensures the engine reaches and holds its intended operating temperature efficiently. Key Features 88-degree opening temperature, matched to the 300Tdi engine's cooling system specification Replacement seal included, eliminating the need to source a separate gasket prior to installation Direct OEM-equivalent fitment for Land Rover 300Tdi applications across three model lines When replacing the thermostat, inspect the thermostat housing for cracks and replace coolant hoses if showing signs of deterioration Vehicle Fitment Fits Defender (1986–2006), Discovery 1 (1989–1998), and Range Rover Classic, all equipped with the 300Tdi engine. Not sure about fitment? Feel free to get in touch at [email protected] Show more