Radiator painted inside?

[ctpres]

Once in a while I remove radiator cap just to be sure fluid is not low. Much to my surprise I found several, one inch square plus some, sheets of what appears to be glosss black paint film floating in the neck. ??????? Very uniform in color and thickness.
2008 chassis/engine.

[DriVer]

Quote:

Originally Posted by ctpres Once in a while I remove radiator cap just to be sure fluid is not low. Much to my surprise I found several, one inch square plus some, sheets of what appears to be gloss black paint film floating in the neck. ??????? Very uniform in color and thickness..

What you could be seeing is some type of coating or paint on the internal parts of the core or radiator tank. I believe that the debris won't ruin your cooling system but I would just fish out the debris in the interim. Make sure the level is completely full to overflow when you put the cap back on. In time when you R&R your coolant, most of the debris will come out with the old coolant.