In order to degrease an engine, a heavy duty engine degreaser is needed, and these can be found at any auto parts store. Make sure an engine is cool and dry before attempting to degrease it with help from car restoration specialists in this free video on car maintenance. Expert: Gary Malec & John Grassi Bio: Gary Malec and John Grassi rebuild cars and boats, do household handyman work, and build computers. Filmmaker: gary malec