When I flushed it didn't look bad at all. BUT the water just smelled really, really stagnant. I will give it more time and see what happens. That is what I don't understand, I seem to have tested just about everything and my heat is still weak. I just ordered a new thermostat to be on the safe side. I will see what happens when I install that. If there is any breakthrough I will post back here.

Thanks everyone.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
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'86 Kawasaki KX 250
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