Volvo Penta 20405688 Thermostat Housing Assembly

Volvo Penta part number 20405688 is a thermostat housing assembly designed for Volvo Penta industrial and marine diesel engines including TD520GE, TAD520GE, TAD720GE, and TAD731GE models. This component integrates the thermostat seat and coolant routing passages within the engine cooling system. The housing is manufactured to OEM specifications for precise fitment and thermal management performance. Cross-reference numbers include VOE20405688 and aftermarket designation TC-05688. Primary applications cover Volvo Construction Equipment excavators EC240 and EC290 equipped with the aforementioned Volvo Penta power units. The housing interfaces with thermostat part numbers 20506125 and 20460312, O-ring 20441519, bleeder screw 20405519, and gasket 20405517. Weight is approximately 0.43 kg.