hi i have a 91 ef civic with a new d16z6 swap.... after the swap i had no heat and my engine temp wouldnt rise unless sittin still for a while... i changed the thermostat and got heat and good temp but my lower rad hose isnt gettin warm to indicate flow, and i was thinkin its the water pump but that would mean that i would be overheating. im just lost on this one help please?!