Engine Coolant Thermostat – 83 °C (181 °F)

The FP-3917324 Thermostat is a high-quality engine coolant thermostat designed to regulate the operating temperature of diesel engines. It opens at 83 °C (181 °F) to ensure proper coolant flow, preventing overheating and maintaining optimal engine performance. Made in the USA, this durable thermostat is manufactured from corrosion-resistant metal with a precision spring mechanism for reliable operation. It is commonly used in Cummins B-Series engines (4BT, 6BT, and related applications) and is suitable for both on-road and industrial equipment.