Flushing the radiator in the 2002 Cadillac Deville is often neglected as part of regularly scheduled maintenance. Service manuals vary on when the radiator needs to be flushed, so it's important to review thoroughly your vehicle's maintenance manual to determine the correct intervals. Rust, grime and calcium deposits found in your radiator can clog the water flow chambers, leading to engine overheating. Performing a simple, periodic radiator flush removes these contaminants and extends the life of your vehicle.
Things You'll Need
- 11 oz. radiator flush
- Antifreeze coolant
- Fluid recycling container
- 5-gallon bucket
- Garden hose
- Floor jack
Locate a level surface to perform the task, set the parking brake and brace the rear wheels using wheel chocks. Carefully raise the Cadillac and lower it onto the jack stands.
Put on your safety glasses, raise the hood and disconnect the battery to prevent from being accidentally shocked. Remove the radiator fill cap by hand to relieve the pressure from the cooling system.
Slide the fluid recycling container directly underneath the radiator drain plug, located on the bottom-left when facing the car. Reach up through the lower splash shield and loosen the drain plug to release the antifreeze (engine coolant) by turning it counterclockwise using a socket wrench. Drain half of the radiator coolant and move the recycling container aside.
Replace and tighten the radiator drain plug and pour in the complete bottle of radiator flush. Refill the radiator with water using your garden hose and replace the fill cap. Start the engine and allow it to idle for two minutes, then turn the engine off. Allow the engine to cool for several minutes before continuing onto the next step.
Put on gloves as an added precaution and place the empty bucket underneath the drain plug. Carefully remove the plug to release the water. Pour this flushed water into the recycling container and safely secure it closed.
Remove the fill cap and insert the water hose into the radiator fill opening, turn on the water and allow it flush for three minutes.
Turn off the water and re-plug the radiator drain. Reconnect the battery, safely re-jack and remove the jack stands.
Start the engine; allow it to idle while filling it with a 50/50 mixture of replacement antifreeze and water. Continue idling for several minutes with the radiator cap off to bleed out any trapped air in the cooling system. Replace the radiator cap by hand and check for leaks at the hose and drain connections.
Tips & Warnings
- Never allow any radiator fluids to enter the sewer system.
How to Flush the Radiator in a Cadillac Escalade
To increase the longevity of a car, an owner should perform the necessary maintenance on a regular basis. For instance, in the...
How to Bleed a Cooling System
The cooling system of a typical automobile will require periodic flushing to remove contaminants and ensure the longevity of the car. It...
How to Take the Radiator Off a Cadillac Sedan DeVille
The radiator on a Cadillac Sedan DeVille is made of aluminum and has a built-in transmission cooler. Road debris or age may...
How to Change a Coolant Temperature Sensor on a Northstar
General Motors first produced the Northstar engine in 1991. Although the Northstar was used primarily in the Cadillac line, it was also...
How to Refill the Coolant in a 1995 Cadillac
Maintaining proper coolant levels is particularly important in the 1995 Cadillac because of its large engine. Larger engines produce more heat, so...
How to Do a Radiator Flush on a Cadillac CTS
If your engine begins to run hot or even if it just begins to smell like coolant, it may be time to...