how do you clean up a used engine

I guess I'm a little bit more fussy, I use the power washer and a good degreaser. I change the timing change and oil pump, flush the pickup in kerosene. Pop the freeze outs and run the pressure washer with a 90 degree tip in the water jacket. you'd be surprised at the stuff that comes out. New freeze out plugs, gaskets and seals and a final cleaning with brake clean before paint. Never had a problem with overheating!