2017 Honda Civic Serpentine Belt: Routing, Replacement, and Part Numbers

Quick Answer

• Belt Length: Varies by engine. See OEM belt PNs below.
• Rib Count: 6-Rib
• OEM Belt PNs:
  • 1.5L L4 (Turbo): 31110-5R0-004
  • 2.0L L4 (Non-Turbo): 31110-5R0-004
• Aftermarket Cross-Reference PNs:
  • For 1.5L L4 (Turbo) and 2.0L L4 (Non-Turbo) engines:
    • Gates: K060410 (This is a common cross-reference, but always verify with a parts supplier.)
    • Dayco: 5060410 (This is a common cross-reference, but always verify with a parts supplier.)
    • Continental Elite: 4060410 (This is a common cross-reference, but always verify with a parts supplier.)
• Auto-Tensioner PN:
  • 1.5L L4 (Turbo): 31170-5R0-003
  • 2.0L L4 (Non-Turbo): 31170-5R0-003
• Idler Pulley PN:
  • 1.5L L4 (Turbo): 31180-5R0-003
  • 2.0L L4 (Non-Turbo): 31180-5R0-003

Belt Routing

The serpentine belt on your 2017 Honda Civic drives various accessories, including the air conditioning compressor, alternator, and water pump. It's crucial to correctly route the belt for proper operation and to avoid damage to components.

Before you begin any work, it is highly recommended to take a clear photograph of your existing serpentine belt routing. This will serve as an invaluable reference during reinstallation.

Here's a typical routing path, starting from the crankshaft pulley:

1. Crankshaft Pulley: The belt originates from the main crankshaft pulley at the bottom, which powers all other accessories.
2. A/C Compressor: From the crankshaft pulley, the belt typically goes to the air conditioning compressor pulley.
3. Idler Pulley: Next, the belt will wrap around an idler pulley, which helps guide the belt and maintain tension. Pay attention to whether the ribbed or smooth side of the belt contacts the idler.
4. Alternator: From the idler pulley, the belt usually goes to the alternator pulley.
5. Water Pump: The belt then proceeds to the water pump pulley.
6. Auto-Tensioner: Finally, the belt routes around the automatic tensioner pulley. The tensioner applies constant pressure to the belt, keeping it taut.

Note: While this outlines a common routing path, slight variations can exist based on engine configuration and specific accessory placement. Always refer to your photographic reference or a vehicle-specific service manual.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your 2017 Honda Civic is a manageable DIY job with the right tools. Ensure the engine is cool before starting.

Tools You'll Need:

• Serpentine belt tool or a 3/8-inch drive breaker bar/ratchet (for the tensioner)
• Socket to fit the tensioner pulley bolt (if applicable, though often a square drive fits directly)

Steps:

1. Locate the Automatic Belt Tensioner: Identify the automatic belt tensioner. It will have a square hole or a bolt head that accepts your serpentine belt tool or breaker bar.
2. Relieve Tension: Insert your serpentine belt tool or breaker bar into the tensioner and rotate it in the direction that loosens the belt tension (usually clockwise or counter-clockwise, depending on the tensioner design).
3. Remove the Old Belt: While holding the tensioner in the loosened position, carefully slip the old serpentine belt off of one of the pulleys (e.g., the alternator or idler pulley).
4. Inspect Pulleys: With the old belt removed, take this opportunity to inspect all pulleys for any signs of wear, wobbling, or excessive noise when spun by hand. Replace any faulty pulleys.
5. Route the New Belt: Following your photographic reference from earlier, carefully route the new serpentine belt around all the pulleys. Ensure the ribbed side of the belt seats correctly in the ribbed pulleys and the smooth side contacts any smooth idler pulleys.
6. Final Tensioning: Once the belt is correctly routed on all pulleys except for one (often the tensioner or an easily accessible idler), re-apply pressure to the tensioner with your tool. Slip the belt onto the final pulley.
7. Release Tensioner: Slowly release the tensioner, allowing it to apply proper tension to the new belt.
8. Double-Check: Visually inspect the entire belt path to ensure it is seated correctly on all pulleys and there are no twists or misalignments. Start the engine briefly (for a few seconds) to confirm proper operation and listen for any unusual noises.

Replacement Interval

Honda typically recommends inspecting the serpentine belt at regular service intervals, usually every 15,000 to 30,000 miles, and replacing it as needed. Generally, a serpentine belt should be replaced every 60,000 to 100,000 miles or sooner if signs of wear are observed. However, always refer to your vehicle-specific owner's manual for the most accurate and up-to-date maintenance schedule.

Factors like extreme temperatures, frequent short trips, or off-road driving can accelerate belt wear, necessitating earlier replacement.

Signs of a Failing Belt or Tensioner

Ignoring a failing serpentine belt or tensioner can lead to significantly more serious and costly repairs. Be vigilant for the following signs:

Signs of a Failing Serpentine Belt:

• Squealing or Chirping Noises: This is one of the most common indicators. A squealing belt, especially during cold starts, acceleration, or when turning the steering wheel, often signals a worn, glazed, or misaligned belt. If it's a continuous squeal, it might indicate a binding pulley.
• Cracks, Fraying, or Missing Ribs: Visually inspect the belt. Any visible cracks, delamination, fraying on the edges, or missing sections of the ribs mean it's time for replacement.
• Glazed or Shiny Appearance: A belt that looks shiny or glazed on the ribbed side might not be gripping the pulleys effectively.
• Loss of Power Steering, A/C, or Charging: If the belt breaks or slips severely, you'll immediately lose power to the accessories it drives. This could mean a sudden loss of power steering, no air conditioning, and the battery warning light illuminating on your dashboard (indicating the alternator isn't charging).

Signs of a Failing Automatic Belt Tensioner:

• Excessive Belt Noise (Squealing/Chirping): A worn tensioner might not be applying adequate tension to the belt, leading to slippage and noise.
• Belt Slippage: If the belt appears to be slipping on the pulleys, even if the belt itself looks good, the tensioner might not be doing its job.
• Worn Tensioner Pulley: The pulley on the tensioner can wear out, causing wobbling or noise. Spin it by hand with the belt off and listen for grinding or excessive play.
• Vibrations: Excessive vibrations from the belt drive system can sometimes be attributed to a faulty tensioner.
• Misalignment: A significantly worn tensioner can sometimes cause the belt to sit incorrectly, appearing misaligned on the pulleys.

If you notice any of these symptoms, it's best to address them promptly to prevent further damage or unexpected breakdowns.

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