2024 Honda Civic Serpentine Belt Guide

Quick Answer

• Belt Length: 2108mm (83 in)
• Rib Count: 7-rib
• OEM Belt Part Number: 31110-6C5-A02
• Aftermarket Cross-References: Gates K070830, Continental 4070830, Dayco 5070830
• Auto-Tensioner Part Number: 31170-6C5-A02
• Idler Pulley Part Number: 31190-6C5-A01

Belt Routing

Before removing the old belt, it is crucial to photograph the existing serpentine belt routing. This will serve as a reference to ensure the new belt is installed correctly. The belt follows a specific path around the engine's accessories.

The routing for the 2024 Honda Civic with the 2.0L engine is as follows:

1. Starts at the crankshaft pulley at the bottom of the engine.
2. Wraps around the A/C compressor pulley.
3. Goes up and around the smooth idler pulley.
4. Travels to the alternator pulley.
5. Comes down to the power steering pump pulley (if equipped, otherwise this step is omitted).
6. Moves to the water pump pulley.
7. Finally, the belt goes around the auto-tensioner, which maintains the correct belt tension.

How to Replace the Serpentine Belt

To replace the serpentine belt, you will need a serpentine belt tool or a long-handled 3/8" breaker bar. Locate the auto-tensioner, which has a square hole for the tool.

1. Insert the tool into the square hole on the tensioner assembly.
2. Rotate the tensioner to release the tension on the belt.
3. While holding the tensioner, carefully slip the old belt off one of the pulleys.
4. Slowly release the tensioner.
5. Remove the old belt completely.
6. Using your photo and the routing description, carefully thread the new belt onto the pulleys, saving the tensioner pulley for last.
7. Once the belt is routed correctly on all other pulleys, apply pressure to the tensioner again and slip the belt over the tensioner pulley.
8. Slowly release the tensioner to apply pressure to the new belt.
9. Double-check that the belt is correctly seated in the grooves of all pulleys.

Replacement Interval

It is recommended to inspect the serpentine belt at every oil change and replace it every 60,000 to 100,000 miles, or as recommended in your owner's manual. However, belts can fail earlier, so regular inspection is key.

Signs of a Failing Belt or Tensioner

• Squealing or Chirping Noises: This is often the first sign of a worn or loose belt.
• Visible Wear: Look for cracks, fraying, glazing, or missing ribs on the belt.
• Accessory Malfunction: A failing belt can cause issues with the alternator, power steering, or A/C.
• Tensioner Noise: A grinding or rattling noise from the tensioner area can indicate a failing bearing in the tensioner or idler pulley.
• Excessive Vibration: A worn tensioner may not be able to maintain proper belt tension, leading to visible fluttering or vibration of the belt.

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