What? How about some proof reading and some punctuation so we know what you're trying to say.... Before you do the heater core swap (huge job, expensive, and probably not your problem).... Did you or didn't you check your coolant level? Does the interior fan run? Does your temp needle go to the normal level or stay low (thermostat stuck open) or is the needle high and your car is over heating (low coolant and posible leak). Is there coolant getting in the car (floor board)? Did you check the valve that controls the flow of hot water into the heater core. It is located at the fire wall on my '92 on the heater hoses. Have a friend watch it while you turn the lever inside from hot to cold. Does it move? is it not conected or broken?