If you do remove the fan and the cowl make sure you keep a supply of bacon and eggs in the vehicle - sooner are later the weather will get hot again, and at some point you will find yourself in a few miles of slow moving stop start traffic, and it wont be long before your engine is hot enough to cook on.
Do you really want to run the risk of damaging your engine due to overheating just to save the few hours it might take to fix whatever problem you have with the cowl or the fan ?