2000 Volvo XC70 thermostat replacement

Follow the upper radiator hose to the engine. The hose is attached to the thermostat housing. You need to remove the two 30 torx screws from the upper timing belt cover and remove the cover. This will give you better access to the thermostat screws. Those are going to be 40 or 45 torx screws? Sorry have not replace a thermostat in a while ;) Remove the screws and replace the thermostat.