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For sure try flushing the heater core. Did mine Saturday. Easy to do and really does it. I flushed a bunch of black gunk out of mine. Now we have great heat. Cost me $10 for supplies. Used 2 pieces og garden hose with 5/8 hose connectors. Water pump side was 3/4 but the 5/8 hose fit snugly inside. Put the water to the bottom heater core hose first. Recommend cleaning overflow tank also. |