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Originally Posted by suzi55
We had it flushed. Soon after, we needed a new water pump. Yes the heater works,and it runs the same temp all the time.So get a new radiator cap? We haven't replaced it before. Is there maybe some kind of drain that may be plugged?
Thanks!
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If you have sloshing in the heater core, it is because you have air in your system.
Air enters through a defective rad cap.
Replace the rad cap and listen to us.
It will take some time before the air is worked out of the system. Best bet is to take the truck for a long drive AFTER replacing the rad cap so the air can be removed.
Also, when the engine is dead cold, take the rad cap off and see if the rad is completely full right up to the top.