[Chevelle-list] Black Radiator Water?

[bad66chevelle454 at aol.com]

Hey All,

A few months back I bought this 62 Cadillac. It had been sitting, not running for roughly 7 years. Just about two weeks ago I got it driving. I rebuilt the carb and water pump on it, and did a general tune it. It runs like new, and I've driven it about 100 miles or so this past week. Well this weekend I was checking the fluids on it...I pulled the radiator cap, and the water was black. I stuck my finger in there, and it looked like I stuck my finger in black grease. The water was barely down. It doesn't run hot, on the gauge, from C to H, its only about a quarter of the way up. When I rebuild the water pump and all that, it wasn't black water. 

What could cause that? The oil is nice and clean, no water in it. The engine doesn't smoke. Could it be the old radiator hoses or something? The heater isn't hooked up either. 

Any ideas? I figure I'll flush it out, drive it some, then see if it happens again. 

Thanks,

-Tim
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