Safety First:
* Disconnect the negative battery terminal before starting any work to prevent accidental short circuits.
* Wear safety glasses to protect your eyes from debris.
* Use jack stands if you need to lift the car. Never work under a car supported only by a jack.
* Let the engine cool completely before working on it.
General Steps (Always refer to your manual for specifics):
1. Identify the serpentine belt: Locate the serpentine belt; it's the long, ribbed belt running around several pulleys.
2. Locate the belt tensioner: This is a pulley with a mechanism (often a spring-loaded lever or hydraulic system) that allows you to loosen the belt. Your repair manual will show you exactly where it's located.
3. Loosen the tensioner: This is the most critical step. You'll typically need a wrench or socket to turn the tensioner pulley, relieving the pressure on the belt. This is where your repair manual becomes indispensable – the method for loosening the tensioner varies greatly. Some have a bolt you turn; others might require a special tool. Try to feel for the position of the tensioner pulley, and turn it such that it relieves tension on the belt.
4. Remove the serpentine belt: Once the tension is released, carefully slip the belt off the pulleys. Start with the pulley that has the most slack, working your way around.
5. Inspect the pulleys and belt: Check the pulleys for damage, wear, or cracks. If they appear worn, replace them as well.
6. Install the new serpentine belt: Route the new belt around the pulleys in the same order as the old belt (following the direction indicated by the old belt).
7. Tighten the tensioner: Once the belt is on all pulleys, carefully tighten the tensioner back to its original position. Refer to your repair manual for the correct tension.
8. Reconnect the battery: Reconnect the negative battery terminal.
9. Start the engine: Start the engine and check for any squealing sounds indicating improper alignment or tension. If you hear any squealing, turn off the engine immediately and double-check your work.
Tools You Might Need:
* Wrench(es) and sockets (sizes will vary depending on your vehicle)
* Jack and jack stands (if necessary for access)
* Socket wrench ratchet
* Pliers or screwdrivers (depending on your car's tensioner system)
* New serpentine belt (buy a belt specifically for your Cadillac's make, model, and engine)
* Shop rags or towels
* Repair manual for your specific Cadillac
Important Considerations:
* Diagram: Your repair manual will have a diagram showing the serpentine belt routing. Follow this diagram precisely.
* Tension: Incorrect tension can lead to premature belt wear and damage to other components.
* Pulley Alignment: Ensure all the pulleys are properly aligned.
* Professional Help: If you're uncomfortable performing this repair yourself, take your Cadillac to a qualified mechanic.
Replacing a serpentine belt isn't excessively difficult, but improper installation can cause significant damage. Always consult your vehicle's repair manual and prioritize safety. If you're unsure about any step, seeking professional help is the best option.
