bassbus

I've searched the threads but there was no definitive fix. I recently put in a new Radiator, rad hoses, thermostat, thermostat cover with new o-ring seal and new o-ring for the water pipe to thermostat connection. However, it keeps leaking under the thermostat housing right at the interface of the water pipe and thermostat housing. Again, I've purchased a new honda o-ring for the water pipe end, everything is cleaned well. I'm at my wits end. Any trick's for getting this leak fixed. See photo.