Do you need a gasket for the thermostat housing on a 1990 Buick century 3300 v6?

Yes, a gasket is typically needed for the thermostat housing on a 1990 Buick Century with a 3300 V6 engine to ensure a proper seal and prevent coolant leaks. It is important to replace the gasket whenever you remove the thermostat housing. In some cases, a gasket maker or sealant may also be used, but a proper gasket is usually recommended for best results. Always refer to the vehicle's service manual for specific recommendations.