2016 Honda Civic Serpentine Belt: Routing, Replacement, and Part Numbers

Quick Answer

The 2016 Honda Civic (excluding 2.0L and 1.5L Turbo models which use a different belt drive system) typically utilizes a 6-rib serpentine belt. Note that the 2.0L and 1.5L Turbo engines in the 2016 Civic do not use a traditional serpentine belt system; they often employ electric power steering and may have different accessory drive configurations.

• Belt Length: Approximately 98.7 inches (2507 mm) for naturally aspirated 1.8L engines (check specific application for other engine variations).
• Rib Count: 6-rib
• OEM Belt PN: 31110-5M1-G01 (for 1.8L R18Z1 engine, verify for your specific engine)
• **Aftermarket Cross-references (for 1.8L R18Z1 engine - verify application):
  • Gates:** K060987
  • Dayco:** 5060987
  • Continental Elite:** 4060987
• Auto-Tensioner PN: 31170-5M1-H01 (for 1.8L R18Z1 engine, verify for your specific engine)
• Idler Pulley PN: 31180-R1A-A01 (for 1.8L R18Z1 engine, verify for your specific engine)

Belt Routing (for 1.8L R18Z1 Engine)

IMPORTANT: Before attempting any belt removal, always take several clear photos of the existing belt's routing. This will serve as an invaluable guide for reinstallation.

The serpentine belt on a 2016 Honda Civic with the 1.8L R18Z1 engine typically follows this path:

1. Begin at the crankshaft pulley (the largest pulley at the bottom, directly driven by the engine).
2. From the crankshaft, the belt typically routes under the A/C compressor pulley (usually located towards the bottom passenger side).
3. After the A/C compressor, the belt may travel over or under an idler pulley (a smooth pulley that guides the belt).
4. Next, the belt routes over the alternator pulley (usually on the upper passenger side).
5. From the alternator, it typically goes over the power steering pump pulley (if equipped, often on the upper driver's side, though many newer Civics have electric power steering and lack this pulley).
6. Then, the belt wraps around the water pump pulley (often located mid-engine, towards the driver's side).
7. Finally, the belt goes around the automatic tensioner pulley, which is designed to maintain constant tension on the belt.

Again, verify this routing with good photographs of your specific engine before removal.

How to Replace the Serpentine Belt

Replacing the serpentine belt on a 2016 Honda Civic (1.8L engine) is a moderately challenging DIY task. You'll need the right tools and a solid understanding of the process.

Tools Needed:

• Serpentine belt tool or a long 3/8-inch drive breaker bar/ratchet.
• Socket to fit the tensioner bolt (often 14mm or 19mm).
• New serpentine belt, auto-tensioner (if replacing), and idler pulley (if replacing).

Steps:

1. Safety First: Ensure the engine is cool and the vehicle is securely parked with the engine off. Disconnect the negative battery terminal.
2. Document Routing: Take multiple photos of the current belt routing for reference.
3. Locate Tensioner: Identify the automatic serpentine belt tensioner. It will have a square opening for your breaker bar or serpentine belt tool.
4. Relieve Tension: Insert your breaker bar into the tensioner's square opening. Rotate the tensioner clockwise (or counter-clockwise, depending on the tensioner design – you want to move it towards the slack side) to relieve tension on the belt. Hold it in this position.
5. Remove Old Belt: While holding the tensioner, carefully slip the old belt off one of the easier pulleys (like the alternator or A/C compressor).
6. Inspect Pulleys: Once the old belt is off, manually spin each pulley (alternator, A/C, idler, water pump, power steering). Listen for any grinding, squealing, or excessive play. Inspect for any signs of damage or wear. Replace the idler pulley or tensioner if they show signs of wear.
7. Route New Belt: Refer to your photos and carefully route the new serpentine belt around all the pulleys, leaving the tensioner pulley for last. This is often the trickiest part.
8. Final Tensioning: Once the belt is mostly routed, again relieve the tensioner and slip the new belt onto the tensioner pulley. Slowly release the tensioner to allow it to apply proper tension to the belt.
9. Double-Check: Visually inspect to ensure the belt is correctly seated in all the pulley grooves.
10. Reconnect Battery: Reconnect the negative battery terminal.
11. Test Run: Start the engine and listen for any abnormal noises. Observe the belt for proper operation.

Replacement Interval

Honda generally recommends inspecting the serpentine belt every 30,000 miles or 3 years, and replacing it if wear is evident. Most serpentine belts are designed to last between 50,000 to 100,000 miles under normal driving conditions. However, factors like extreme temperatures, contamination (oil, coolant), and aggressive driving can shorten its lifespan.

It's also a good practice to replace the serpentine belt when replacing any of the accessory components it drives (alternator, A/C compressor, power steering pump, water pump, tensioner, or idler pulley).

Signs of a Failing Belt or Tensioner

Ignoring a failing serpentine belt or tensioner can lead to a breakdown, as essential systems like your charging system (alternator), cooling (water pump), and air conditioning (A/C compressor) will cease to function.

Signs of a Failing Serpentine Belt:

• Squealing or Chirping Noises: This is often the most common symptom, especially during cold starts or when turning the steering wheel (if equipped with hydraulic power steering).
• Cracks or Fraying: Visible cracks, fraying edges, or chunking (missing pieces) on the belt.
• Glazed or Shiny Appearance: The ribbed side of the belt appears shiny or glazed, indicating slippage.
• Loss of Power Steering, A/C, or Charging: If the belt breaks, these systems will immediately stop working.
• Overheating: A broken or slipping belt can prevent the water pump from circulating coolant, leading to overheating.

Signs of a Failing Automatic Tensioner:

• Squealing or Chirping Noises: Similar to a failing belt, a worn tensioner can cause belt slippage and noise.
• Belt Vibration or Flapping: Excessive vibration or a visible flapping motion of the belt, particularly in longer runs.
• Belt Slack: The belt appears unusually loose even after the engine has been running.
• Play in the Pulley: Wiggle the tensioner pulley. Any noticeable play or looseness indicates a worn bearing.
• Rust or Grinding from Pulley: The tensioner pulley itself may be making grinding noises due to a failing bearing.

If you notice any of these symptoms, it's crucial to have your serpentine belt and tensioner inspected promptly.

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