I have replaced water pump, heater core, 190 thermostat, there is no flow problems... Just hardly any flow to core UNLESS I rev the engine high speed... and still just barley warm. System is full no air pockets, Thermostat does open engine stays lower than 190 at all times. Even when totally covered radiator from air flow and have even pinched the top radiator hose to get more flow to heater core. Still just warm air but is warmer. I am thinking I need a water pump that pushes more water and higher thermostat. the heater core only gets warm...I am at a loss... Any Help?