Power Wahser to Clean Rear Radiator

First of all, I don't let the dirt and grime build up in my radiator system. Then when I do clean it, it's pretty easy. I put hot water and Simple Green in a two gallon pump sprayer. Then, with the engine running I spray into the fan, partly cleaning the fan, but blowing the mixture through the radiators. After waiting about a half hour, I spray from the rear pushing whatever is in the radiator forward, continuing until the effluent is clean. Many miles on many hills with no rise in temperature. I do have a slobber tube that extends beyond the radiator.

Paul