Tools You'll Need:
* New power steering belt: Get the correct size and type from a parts store. Provide them with your Cadillac's VIN or engine details.
* Wrench(es): You'll need the correct size(s) for the power steering pump pulley bolt and any other adjustment bolts. Likely metric.
* Socket wrench set: A ratchet with various sockets will be helpful.
* Pliers (optional): May be needed to help position the belt.
* Gloves: Protect your hands.
* Jack and jack stands (highly recommended): Safely lifting the car will give you more working room.
* Wheel chocks: Essential for safety when working under the car.
* Shop rags or paper towels: For cleaning.
Steps (General Procedure):
1. Safety First: Park the car on a level surface, engage the parking brake firmly, and chock the wheels. This is crucial for your safety. If you jack the car up, use jack stands to support it securely.
2. Locate the Belt: The power steering belt is usually located on the front of the engine, relatively low. Identify the power steering pump pulley and the various other pulleys the belt drives.
3. Loosen the Belt Tensioner: Many older Cadillacs used a spring-loaded tensioner pulley. There should be a bolt on the tensioner. You'll need to loosen this bolt to create slack in the belt. Sometimes you need to use a wrench to turn the tensioner itself (counter-clockwise will usually relieve tension), creating enough slack to slip the belt off. This is the most critical step and varies significantly by car. Examine the area carefully to identify how your tensioner works. This may require a specialized tool or a long extension on your wrench.
4. Remove the Old Belt: Once there's enough slack, carefully remove the old belt from the pulleys. It may help to start at the easiest pulley to remove it from.
5. Install the New Belt: Route the new belt onto the pulleys in the same path as the old belt. Make sure it sits correctly in all the grooves of each pulley.
6. Tighten the Tensioner: Carefully tighten the tensioner bolt back to its original position. This will put tension on the new belt.
7. Check Belt Tension: Rotate the power steering pulley by hand. The belt should be snug but not overly tight. It should not be easily twisted by hand. If it is too loose or too tight, adjust the tensioner accordingly.
8. Lower the Vehicle (if raised): Carefully lower the vehicle back to the ground using the jack.
9. Test: Start the engine and carefully check for any squealing or unusual noises from the power steering system. Also visually inspect the belt for proper alignment and tension.
Important Notes:
* Diagram: A diagram from your owner's manual or a repair manual specific to your '84 Cadillac DeVille will be invaluable. It will show the exact routing of the belt and the location of the tensioner.
* Difficulty: This can be a challenging job for someone without mechanical experience. If you're uncomfortable working on your car, consider taking it to a qualified mechanic.
* Belt Type: Note the type of belt (e.g., V-belt, serpentine belt) as it influences replacement procedures. The right parts store can help you.
Remember, safety is paramount. If you are not confident in performing this repair, seek professional help. Improperly tensioned or routed belts can damage the power steering pump and other components.
