Do I need to drain the coolant system before swapping this in?

Yes. You'll need to drain your existing coolant fully before disconnecting the old radiator. Refill with fresh coolant once the new unit is seated and all hose clamps are tight. Refer to your vehicle's service manual for the correct coolant type and capacity.

Will this radiator work with my current hoses and clamps?

Your factory hoses and clamps will reattach to the same tank ports on this radiator. Check hose condition while you're in there—if they're cracked, split, or hard, replace them at the same time to avoid future leaks.

What if my thermostat housing or water pump needs work—should I replace those too?

Not necessarily with the radiator. If your cooling system is otherwise sound, this swap handles the radiator job alone. If you're getting low coolant warnings or overheating despite a new radiator, those components may need separate diagnosis.