I am replacing my water pump on my c-15 cat.I saw this stuff in the end of my oil cooler.I am going to take it off,pressure test it and clean it up.
Does anyone know what this gunk is in the end of the oil cooler?
I am thinking someone in the past may have put some kind of stop leak in the coolant SL200541975 [ATTACH=CONFIG]1437[/ATTACH].