OTTO Excavator Parts Zx450 6Wg1T Thermostat Shell 8981660110 898166-0110 8-98166011-0 For Isuzu The OTTO Excavator Parts Zx450 6Wg1T Thermostat Shell with part number 8981660110 is a component designed for Isuzu engines, serving as a crucial element in the engine's cooling system for maintaining optimal operating temperatures.