Here's a general outline, but you'll need a repair manual specific to your 1990 Buick Reatta for precise diagrams and torque specifications. A Haynes or Chilton manual would be helpful.
Tools You'll Likely Need:
* Serpentine belt: Get the correct replacement belt for your Reatta's engine. The size is critical.
* Socket set: Various sizes, likely including metric.
* Wrench set: Both metric and possibly standard.
* Ratchet: A good quality ratchet will make the job easier.
* Extension(s): To reach difficult fasteners.
* Pliers: Possibly needle-nose for accessing some belt tensioner components.
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Gloves: To protect your hands.
* Repair manual: Crucial for diagrams and torque specs.
General Steps (Consult your repair manual for precise details):
1. Safety First: Disconnect the negative battery cable. Secure the vehicle on jack stands after properly jacking it up. Engage the parking brake and use wheel chocks.
2. Locate the Belt Tensioner: The Reatta's serpentine belt routing can be complex. Your repair manual will show the exact routing. Identify the belt tensioner; it's the component that allows you to loosen the belt to remove it. It usually has a pulley that can be rotated using a socket or wrench.
3. Loosen the Tensioner: This is usually the trickiest part. The tensioner may require a specific socket size or a special tool to loosen its pulley. You'll need to apply pressure to the tensioner to relieve pressure on the belt, allowing you to remove the belt from the pulleys. This may require significant force, be careful not to slip.
4. Remove the Old Belt: Once the tension is released, carefully remove the belt from the pulleys. Note the belt's routing.
5. Install the New Belt: Route the new belt in exactly the same order as the old one. Your repair manual will have a diagram.
6. Tighten the Tensioner: Once the new belt is in place, carefully release the tensioner. Ensure the belt is properly seated on all pulleys.
7. Reconnect Battery Cable: Reconnect the negative battery terminal.
8. Double Check: Start the engine and check for any squealing or slipping noises. If you hear any abnormal sounds, shut off the engine and check your work. The belt may need to be slightly adjusted or repositioned.
Important Considerations:
* Tensioner Type: The 1990 Reatta's tensioner might require a specific tool or approach to loosen it. Your repair manual is vital here.
* Pulley Alignment: Ensure all pulleys are properly aligned. A misaligned pulley can damage the belt quickly.
* Belt Routing: Get the routing absolutely correct; an incorrectly routed belt can cause damage.
Again, I strongly advise consulting a repair manual specific to your 1990 Buick Reatta before attempting this repair. This information is for general guidance only and does not substitute professional advice. If you're unsure about any step, it's best to seek professional help from a qualified mechanic. Improperly replacing a serpentine belt can lead to engine damage.
