Unleashing the Potential of Black Coolant A Guide to Improved Performance

Try draining your radiator to see if there is oil mixed with the antifreeze. That could mean a blown headgasket or other serious engine problems. Black or cloudy coolant can be caused by excessive rust or corrosion, or contamination in the cooling system. Buy RASTP Universal 1L Coolant Overflow Tank, Aluminum Coolant Radiator Tank,Reservoir Expansion,Black: Coolant Recovery Kits - Amazon.com ✓ FREE DELIVERY ... Universal Radiator Coolant Overflow Tank Bottle 800ml Aluminum Black. Keep Operational Temperatures-Radiator coolant overflow tank makes the engine coolant ... I have seen these overflow tanks using either a black solid color or a clearish white color. I am just curious if one superseded the other ... so for the past 2 years black spots keep appearing on the coolant tank walls, the coolant itself is crystal clear there is no oily residue ... I've got black sludge in my coolant. It does not appear to be oil. It was thick on the cap, almost like a paste, and dipping a rag into the radiator, it came ... Black coolant can be caused by deterating radiator hoses, crud in the cooling system, and oil getting into the coolant. The Subaru coolant conditioner is present, because it looks granulated when you look at the coolant in the light. In my bucket, the coolant appears black. It's either ATF from the trans. cooler in the radiator (which can be almost black if it hasn't been changed), or it's actually oil.