Tools You'll Need:
* New alternator belt: Make sure you have the correct size. Your vehicle's repair manual or a parts store can help with this.
* Socket wrench set: You'll likely need this to loosen and tighten the tensioner.
* Wrench(es): May be needed depending on the tensioner design.
* Gloves: To protect your hands.
* Jack and jack stands (optional but recommended): For easier access, especially if you have to remove the bottom engine cover.
* Shop rags or paper towels: To keep things clean.
Steps:
1. Safety First: Engage the parking brake firmly. Disconnect the negative battery terminal. This prevents accidental shorts and protects your electrical system.
2. Locate the Alternator and Tensioner: The alternator is usually located towards the front of the engine on the passenger side. The tensioner is a pulley with a mechanism to adjust belt tension. It might be a spring-loaded tensioner or one you adjust with a wrench. Locate these components.
3. Identify the Belt Routing: Before removing the old belt, carefully examine how it routes around the various pulleys (crankshaft, alternator, power steering pump, etc.). Take a picture or make a sketch if needed. This is crucial for correctly installing the new belt.
4. Loosen the Tensioner: This is the most critical step. You'll need to loosen the tensioner to release the slack in the belt. The method varies depending on the type of tensioner:
* Spring-Loaded Tensioner: Often, you just need to use a wrench or socket to turn a bolt on the tensioner itself, thus releasing the tension on the belt. You may need to use a pry bar or long handled wrench to assist. Be careful not to over-tighten or break anything.
* Automatic Tensioner: Some systems use a hydraulic or automatic tensioner. These usually require a special tool, but sometimes a long bolt or wrench can be used to slightly manipulate the mechanism. Again, consult your repair manual.
5. Remove the Old Belt: Once the tension is released, carefully slip the old belt off the pulleys.
6. Install the New Belt: Carefully guide the new belt onto the pulleys, following the routing you observed or sketched in Step 3. Ensure it sits correctly in the grooves of all pulleys.
7. Tighten the Tensioner: Once the new belt is on all pulleys, carefully tighten the tensioner back to its normal position. The belt should have a slight amount of tension but not be overly tight. You should be able to slightly twist the belt with your fingers between pulleys.
8. Check Belt Tension: Try to twist the belt between the alternator and crankshaft pulley. It should deflect slightly but not easily twist. If you can twist it too easily, the belt is too loose and needs more tension. Too much tension will put stress on bearings and can cause premature wear.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Start the Engine: Start the engine and check for any squeaks or squeals. If you hear any unusual noises, turn off the engine immediately and double-check the belt routing and tension.
Important Considerations:
* Repair Manual: This is absolutely crucial. A repair manual specific to your 1998 Mazda Protege will show you exactly where everything is located and the correct procedure.
* Belt Size: Ensure you purchase the correct size belt.
* Tension: Proper belt tension is critical. Too tight and you'll put stress on components. Too loose and the belt will slip.
If you're not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Improper installation can lead to serious damage to your engine.
