Heating the coolant in an engine block can help get your vehicle started in cold weather. The heater is plugged into standard household electrical power through a power cord that is connected to the heater unit. The heater warms the coolant which creates a convective flow. This flow distributes the warmed coolant throughout the engine block. Allow the vehicle to cool off completely before attempting to open the cooling system.
Remove the radiator cap and then set it aside.
Place the drain pan on the ground under the radiator drain plug. Open the radiator drain plug using an appropriate mechanic's tool. Allow the coolant to fully drain. Close the drain plug and then remove the drain pan.
Inspect the hose to be certain it is in operational condition. Replace the hose if it is not in operational condition.
Measure the distance given in the instructions for cutting the lower radiator hose. Cut the hose with the heavy utility knife at the places indicated in the instructions.
Install the new heater. Slide each cut end of the hose onto a hose flange on the heater unit. Follow the manufacturer's instructions for installing the heater unit in the proper flow direction. Install hose clamps and tighten the clamps on the flanges.
Route the heater's power cord to the front of the vehicle keeping the cord away from moving engine parts and components that get hot. Use wire ties or electrical tape to secure the cord along its path. Tuck the end of the power cord in the front of the vehicle so it is accessible when the heater needs to be plugged in.
Refill the radiator with the coolant collected in the drain pan. Reinstall the radiator cap when the cooling system is full.
Check for coolant leaks.
