Mix:
2 gallons distilled water with a cup of Pine-Sol.
Parts must be decreased and dry before you put them in.
Throw in a few mopar rocker arms, preheat the distlled water mix to 150°, then turn on the Ultrasonic Cleaner, throw in the rocker arms for a half hour and watch them get clean.
Rinse with distilled water and polish up with a shop rag.