2024 Honda Pilot — Serpentine Belt Routing & Length

The serpentine belt on your 2024 Honda Pilot is a critical component that drives the essential accessories of your 3.5L V6 engine. Whether you are performing routine maintenance or addressing a squealing belt, having the correct routing diagram, part numbers, and specifications is essential for a smooth repair.

Below is a comprehensive guide from an ASE-certified master technician to help you tackle the serpentine belt replacement on your 2024 Honda Pilot.

Quick answer

Here are the essential specifications and part numbers for the 2024 Honda Pilot (3.5L V6) serpentine belt system:

• Belt Length: 64.5 inches (approximate)
• Rib Count: 6-rib
• OEM Belt Part Number: Honda 31110-69Z-A01 (verify with VIN)
• Aftermarket Cross-References: Gates K060644, Dayco 5060645, Continental Elite 4060645
• Auto-Tensioner Part Number: Honda 31170-69Z-A01 (Gates 39242)
• Idler Pulley Part Number: Honda 31190-RLV-A00 (Gates 36617)

Note: Always verify exact part numbers with your local parts supplier using your vehicle's VIN, as mid-year production changes can occasionally alter specific part requirements.

Belt routing

Since we cannot render an image of the engine bay, here is the text-based step-by-step description of the routing path. Pro-tip: Always photograph your existing belt with your smartphone before removal to ensure you have a personalized visual reference.

For the 3.5L V6 engine, the ribbed side of the belt will ride on the grooved pulleys, while the smooth back side of the belt will ride against the flat idler and tensioner pulleys.

1. Start by looping the ribbed side of the belt around the bottom of the Crankshaft pulley (the main lower drive pulley).
2. Route the belt straight up and over the A/C Compressor pulley.
3. Bring the smooth side of the belt down and under the smooth Idler pulley.
4. Pull the ribbed side up and around the Alternator pulley.
5. Route the belt across to the Power Steering pump (if applicable based on specific trim/hydraulic setup, though many modern Hondas utilize EPS; route accordingly if a grooved accessory pulley is present in this position).
6. Take the belt down around the Water Pump pulley.
7. Finally, pull the smooth back side of the belt over the Auto-Tensioner pulley. You will need to relieve the tension to slip this final section onto the tensioner.

How to replace the serpentine belt

Replacing the serpentine belt on a 2024 Honda Pilot can typically be done in your driveway with basic hand tools.

Tools required:

• Serpentine belt tool or a long 3/8" drive breaker bar
• Safety glasses
• Mechanic's gloves

Step-by-step instructions:

1. Locate the tensioner: Find the automatic belt tensioner on the passenger side of the engine. Look for the square 3/8" drive slot or the integrated hex bolt on the tensioner arm.
2. Relieve tension: Insert your 3/8" breaker bar or serpentine belt tool into the tensioner. Slowly rotate the tool clockwise (or counter-clockwise, depending on the specific tensioner casting—feel for the spring giving way) to relieve the tension on the belt.
3. Remove the old belt: While holding the tensioner open, slip the old belt off the easiest accessible pulley (usually the alternator or the idler pulley). Slowly release the tensioner back to its resting position.
4. Route the new belt: Follow the routing path described above. Loop the belt around all pulleys except for the final tensioner or idler pulley.
5. Install the new belt: Rotate the tensioner again using your breaker bar. Slip the new belt over the final pulley. Ensure the belt is perfectly seated in the grooves of all ribbed pulleys and sitting squarely on the flat pulleys.
6. Release and inspect: Carefully release the tensioner. Double-check all pulleys with a flashlight to ensure the belt is not off by a rib. Start the engine and observe the belt for a few seconds to ensure smooth operation.

Replacement interval

For the 2024 Honda Pilot, the serpentine belt does not have a strict mileage replacement interval, but it falls under Honda's "Maintenance Minder" system. Generally, you should inspect the belt every 30,000 miles. Most high-quality EPDM belts will last between 60,000 and 90,000 miles. If you are replacing the belt, it is highly recommended to inspect the auto-tensioner and idler pulley, as the bearings in these components often wear out around the 100,000-mile mark.

Signs of a failing belt or tensioner

Catching a failing belt early can save you from being stranded. Look out for these common symptoms:

• Squealing or Chirping Noises: High-pitched noises upon startup or hard acceleration usually indicate a loose belt, a failing tensioner spring, or worn pulley bearings.
• Visible Wear: Look for fraying edges, missing chunks of ribs, or excessive cracking on the ribbed side of the belt. Modern EPDM belts don't crack as obviously as older neoprene belts, so a belt wear gauge is the most accurate way to measure rib depth.
• Accessory Malfunctions: A slipping belt can cause the A/C to blow warm, the battery warning light to illuminate (failing to spin the alternator), or heavy steering.
• Tensioner "Bouncing": While the engine is idling, watch the auto-tensioner. While slight vibration is normal, excessive bouncing indicates the internal hydraulic damper or spring has failed.

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