Buddy.... washing the engine just with water doesnt make anithing.... use a degreaser... like Mistolin, or a degreaser for the cooking device.... it can be concetrated.... no worris... you will paint the engine after all
The good in having a very effective workshop/repair shop for business is having a complete set of tools used for every complicated repairs. Lessens manhour spent and satisfied customers as your best word-of-mouth-advertisers.