Will this work if my vehicle has been modified or upgraded?

This assembly is engineered for the stock 3.5L non-tow configuration. If your cooling system has been heavily modified, test-fit before final installation to confirm clearance and airflow compatibility.

Do I need to drain coolant to install this?

Depends on your access and how you plan to work. Many installers can remove and replace the assembly with minimal coolant loss by working carefully around the radiator. Check your service manual for the cleanest approach for your specific setup.

Is the fan clutch adjustable or pre-set?

This assembly ships as a complete unit with the clutch pre-matched to OEM specs. Adjustment is not required—install and run.