SoCalMonty
Explorer
WOW. I've never seen that kind of sludge in an engine before!!!
If you had sand in there, are you sure that it's not in the lines as well? I would think that if the cooler had sand in it, and the motor had sand in it, then the lines may have sand in them too...and I can't recall of the top of my head but most cars also have oil cooling lines that are build into the radiator...so you have to make sure those are all clean too.