Part of my engine is polished what do I need to do when I wash it?? And what do I need to use on it when I do? Check out the pic I have of it on here.

 

Don't wash the engine as often as the exterior. Once you clean up the engine comartment, it should stay clean with minor wipes. If you are collecting grime & oil you have problems. I have not washed my engine with water in years. But I do clean it up every so often with Armor All.