How do you remove thermostat housing from a 1986 Honda accord?

To remove the thermostat housing from a 1986 Honda Accord, first ensure the engine is cool and disconnect the negative battery cable. Drain the coolant from the radiator, then remove any hoses connected to the thermostat housing. Unbolt the housing using the appropriate socket or wrench, and gently pry it off, taking care not to damage the gasket or mating surfaces. Clean the area before installing the new thermostat and housing.