Engine Block Heaters For Sale What Is an Engine Block Heater? An engine block heater warms engine coolant to improve cold starts, reduce engine wear, and ensure reliable performance in low temperatures. These heaters are commonly used in standby generators, diesel engines, and industrial equipment. Available Engine Block Heater Options 120V engine block heaters for standard applications 240V and 277V heaters for higher output systems Wattages from 500W to 2000W Multiple temperature ranges (80–140°F) Common Applications Standby generators Diesel engines Industrial equipment Backup power systems Common Applications Standby generators Diesel engines Industrial equipment Backup power systems Related Generator Heater Components Looking for replacement parts? Browse block heater thermostats, sensing units, and control components to keep your system running efficiently.