Elevate Your System with the Superiority of Black Coolant

Unfortunately if the coolant is black it seems to be getting oil in the coolant through the head gasket. This is even more likely since it is ... Looks like this May have been a mess of previous stop leak and dirt from the past as Jeff said. I think the foaming aspect May have been from ... Black cap will keep the cooling system at 11psi, the green one at 22psi. Higher pressure means higher boiling point. volvo started putting the ... The coolant is starting to turn from BMW blue to black. In the past as the coolant has deteriorated it's turned more of an orange color. The black/dark stuff in your coolant. As you can see, the oem purple coolant migrates towards a dirty pink color as it ages. Black and sticky is combustion by-products from a aged out tired head gasket. Its not WATER PUMP LUBE ARE STOP LEAK! The black substance you see is what's left of the inside of your hoses typically. The one that seems to suffer the most is the one in the ... I've got a black waxy residue that will not flush out. Another interesting characteristic is that the solidified residue liquifies when heated and floats to ... Black could be aluminum corrosion since most of the system is made of that. Might be it never got properly rinsed out, I'd be doing it again.... The coolant reservoir isn't just an overflow like most cars. It's actually pressurized so potentially the black plastic is easier to make in the ...