Try using white vinegar. I first take off both lines and blow them out with shop air. Then I use two pieces of heater hose and hold both up and fill one end until vinegar starts coming out of the other hose. I let it sit for an hour or so and then flush both ways with water pressure. Sometimes it works and sometimes it doesn't. It is a big job to change the heater core. The blend door and the recirc door also go bad sometimes. This can cause a no heat situation also.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
... [Read Article]
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