[Johnp33]

You want it warm not hot, soak it down with ,GUNK citrus cleaner, not the foam, then pressure wash, you want to check, it over and really look to be sure you get at every area with the cleaner, and the pressure washer, removing the inner fenders, skid plates. Pressure wash, from the bottom up, then from the top down, to finish. Spend a little time doing the preliminary checks and preparations and it will come out fine there is nothing that has to be covered it will not hurt your alternator. I have washed thousands and never had one fail. After you get the motor clean, pressure wash with soap into the rad then start it up and rinse threw the rad, straight threw not at an angle you can damage the rad and AC condenser. Rinse the motor and alt off with it running.