My other truck is missing a fan shroud. Particularly during the winter, desalting sand gets all on top of the engine, idler pulley, Weber air cleaner pin holes form in front from high-velocity sand - is the fan picking up/ projecting abrasive out of the lower radiator area? Keep it factory, repair them, paint them, use good hardware with a fresh lockwasher to secure them, and install with anti-sieze. Don't change the low-pressure vacuum thru the engine bay without considering hot floor pans and (factory sheet metal) transmission hump - something melted my factory tar insulator on the floor, and I'm missing a few of the splash guards / air dams. The one by the clutch slave has a convenient drainage hole to route thru for 1/4-inch clear vinyl bleeder tube (bubble trap / loop) when changing out DOT3 on the clutch.