Mastering Black Coolant The Ultimate Performance Enhancer

After some digging, I noticed my coolant is thick and black and there appears to be a leak out of the seams of my expansion tank. Upgrade Your 2016-2021 Camaro with the Mishimoto Coolant Overflow Expansion Tank. Sign Glass for Fluid Level Indication, Aluminum Construction for Maximum ... Over 12 week blackish SOOT build up in Coolant tank no diesel smell, coolant loss 100 ml coolant Clean. DPF burn temp okay data log engine temp okay Black colored coolant in Mack. Jump to page : 1 Now viewing page 1 [50 messages per page] View previous thread :: View next thread. I replaced my water pump this weekend due to it seizing up and breaking off all the belts. When I drained out the coolant from the radiator, ... I am just draining out the green coolant we put in this spring and it is now as black a coal. Does anybody have any ideas what would cause this? Most times you can find a 'flushing kit', I think Prestone makes one. It comes with it's own chemicals which you shouldn't have to worry about hurting the ... I have a black clay like build up in my radiator cap. I cleaned it off 2 days ago and it's back. Its not the common brown sludge that you see when dexcool goes ... 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.... I had that too. You can drain it out of the reservoir and put clean water in but in a few days the black will be back. The cure for me was a new ...