Generally, the process involves these steps:
1. Identify the Belt: Determine which belt needs replacing (alternator, power steering, AC, etc.). The owner's manual will have diagrams showing which belt drives what.
2. Loosen Tensioner(s): Most 1990 Probes likely use a serpentine belt system with an automatic tensioner. Locate the tensioner pulley; it'll have a bolt or lever that allows you to release tension on the belt. You may need a wrench or socket to loosen this. Be careful, as the tensioner will spring back with considerable force when released.
3. Remove the Old Belt: Once the tension is released, carefully work the old belt off the pulleys. Sometimes a flathead screwdriver can help pry the belt off the pulleys.
4. Install the New Belt: Starting with the tightest pulley, work the new belt onto each pulley. Follow the routing diagram in your owner's manual precisely! If the routing is incorrect, you could damage the engine.
5. Tighten the Tensioner: After the belt is on all pulleys, carefully release the tensioner lever or bolt. The tensioner should automatically pull the belt tight.
6. Check Tension: Manually check the belt tension. It shouldn't be too loose (it should deflect slightly when pressed firmly) or too tight (this could cause premature wear). If you're unsure, consult a mechanic or repair manual for the correct tension specifications.
7. Start the Engine: Start the engine and check for any squealing or unusual noises. If you hear squealing, the belt tension may be incorrect, or the belt routing might be wrong. Double-check everything before continuing.
Important Safety Precautions:
* Disconnect the negative battery cable before beginning any work. This prevents accidental shorts or shocks.
* Use the correct tools. The wrong tools can damage pulleys or the tensioner.
* Wear safety glasses. Broken belts can fling debris.
* If you're uncomfortable performing this repair, take your car to a qualified mechanic.
Without a specific diagram for your 1990 Ford Probe's engine, this is the best general guidance I can provide. Refer to your owner's manual for accurate belt routing and tensioning instructions. A repair manual specific to your vehicle's year and engine will also be extremely helpful.
