Tools You'll Need:
* New serpentine belt: Ensure you get the correct size and type for your specific engine. Check your owner's manual or an auto parts store for the correct part number.
* Socket wrench set: Various sizes will likely be needed, including possibly a ratchet and extensions.
* Wrench set: Metric wrenches are essential.
* Jack and jack stands: Crucial for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the vehicle from rolling.
* Pry bar (optional): May be helpful for loosening stubborn pulleys.
* Gloves: To protect your hands.
* Safety glasses: To protect your eyes.
* Pen or marker: To mark belt routing if needed.
Steps:
1. Safety First: Park on a level surface, engage the parking brake, and chock the wheels. Raise the vehicle using the jack and secure it on jack stands.
2. Locate the Serpentine Belt: Identify the serpentine belt and its routing around the various pulleys (alternator, power steering pump, water pump, etc.). Before removing the belt, carefully trace its path and take a picture or make notes. This is crucial for reinstallation.
3. Loosen Belt Tensioner: The serpentine belt is kept under tension by a tensioner pulley. This usually requires loosening a bolt on the tensioner. This bolt's location varies by engine. Consult your repair manual for the exact location and method. You may need to use a socket wrench and/or a wrench to loosen the tensioner. Once loosened, the tensioner pulley will allow you to remove the belt.
4. Remove the Old Belt: With the tension released, carefully slip the belt off the pulleys.
5. Install the New Belt: Starting with the tightest pulley (usually the crankshaft pulley), carefully route the new belt around each pulley, following the path of the old belt (your notes or picture from step 2 will be essential here).
6. Release Tensioner: Once the belt is routed correctly around all the pulleys, slowly release the tensioner pulley bolt, allowing the tensioner to pull the belt snug against the pulleys.
7. Check Belt Tension: Ensure the belt is properly tensioned. It should not be too loose or too tight. There should be slight give when pressed.
8. Lower the Vehicle: Carefully lower the vehicle from the jack stands.
9. Start the Engine: Start the engine and listen for any squealing or unusual noises. If you hear anything, stop the engine immediately and re-check the belt routing and tension.
Important Considerations:
* Engine Type: The location and type of tensioner varies between the VG33E and KA24E engines. Your repair manual is essential for correct procedure.
* Belt Routing: Incorrect routing can lead to premature belt failure or damage to components.
* Tension: Improper tension can also cause premature failure or damage.
* Pulley Condition: Inspect the pulleys for wear or damage while the belt is off.
This guide provides a general overview. Always consult your vehicle's repair manual for specific instructions and torque specifications for your 1998 Nissan Pathfinder. Failure to follow the correct procedure could lead to damage to your vehicle or personal injury. If you are unsure about any step, seek professional help from a qualified mechanic.
