Tools You'll Likely Need:
* New AC belt: Make sure you have the correct size. Check your owner's manual or a parts store using your vehicle's VIN.
* Socket wrench set: You'll probably need to loosen or remove the tensioner pulley.
* Wrench (possibly adjustable): Depending on the tensioner design.
* Gloves: To protect your hands.
* Flashlight: To improve visibility.
Steps (General):
1. Locate the AC belt: It's usually the serpentine belt (one long belt driving multiple accessories), and it's often the one that runs around the AC compressor.
2. Identify the tensioner pulley: This is a pulley with a mechanism to create tension on the belt. It might have a bolt you need to loosen or a lever you need to manipulate.
3. Release tension on the belt: This is the *crucial* step. There are two common tensioner types:
* Bolt-type tensioner: You'll need to use a socket wrench to slightly loosen the bolt on the tensioner. This will allow you to move the tensioner pulley slightly, creating slack in the belt.
* Lever-type tensioner: This type often has a lever that you can push or pull to release tension. This might require a wrench or just manual pressure.
4. Remove the old belt: Once you've created enough slack, carefully guide the belt off the pulleys.
5. Install the new belt: Route the new belt in the *exact same path* as the old one. Make sure it fits snugly onto all the pulleys.
6. Re-tighten the tensioner: Once the belt is fully seated, carefully re-tighten the tensioner bolt (or release the lever). Ensure the belt is properly tensioned – you should be able to push down slightly on the longest span of belt between two pulleys; it shouldn't deflect too much. Again, consult your repair manual for the correct tension.
7. Check for proper belt routing: Make absolutely certain the belt is routed correctly around all the pulleys.
8. Start the engine: After installation, run the engine briefly to ensure the belt is running smoothly and that there are no squeaking or squealing noises. If there are noises, turn the engine off immediately and recheck your work.
Important Considerations:
* Safety First: Disconnect the negative battery terminal before starting any work to prevent electrical shocks.
* Proper Tension: Incorrect belt tension can lead to premature belt wear, pulley damage, and even belt breakage. Consult your owner's manual or a repair manual for specific tension requirements.
* Professional Help: If you are not comfortable performing this task, it's best to take your vehicle to a qualified mechanic. This is especially important if you're unsure about the tensioner mechanism.
This is a simplified explanation. Always refer to your vehicle's repair manual for detailed instructions and diagrams specific to your 1990 Lincoln Town Car. Failing to do so could lead to incorrect installation and potential damage to your vehicle.
