Download 2015 Acura RDX Engine Block Heater Installation Instructions – 1. Disconnect the negative cable from the battery. 2. Allow the engine and all cooling system componentsto cool down. 3. Place a clean drain pan under the radiator drain plug, then remove the drain plug from the bottom of the radiator to drain the coolant. Remove the radiator cap to increase the flow. NOTICE: Radiator coolant will damage the paint. Quickly rinse any spilled coolant from the paint finish. 4. After the coolant drains, reinstall the radiator cap to prevent dirt and contamination from entering the radiator. 5. Apply masking tape to the front bumper, left headlight and left front fender as shown. 6. Repeat step 5 to apply masking tape to the right side of the vehicle. 7. Remove the front grille cover and air duct (ten clips). 8. Remove the front bumper. • Remove the two self-tapping screws, two hex bolts, ten clips, and two long clips. • Release the three retaining tabs on each side. • Release the six retaining tabs on each side. • With the help of an assistant, remove the front bumper. • Place the front bumper on a blanket. 9. Open the positive cable cover, and disconnect the positive (+) battery cable from the battery. 10. Remove the battery holder (two nuts). 11. Remove the battery cover, battery, and battery tray. 12. Using a pushpin, pierce the side duct and engine under cover at the measurements shown.