2020 Honda Accord Engine Ticking? How to Diagnose and Fix

How to Fix Timing Chain Guide Issues

The 2020 Honda Accord is generally a reliable vehicle, but like any car, it can experience problems. One issue some owners have encountered is related to the timing chain. As one owner shared: "Fixed it up and put a few thousand miles on it since then. Lots of mechanics, especially dealerships, just want to charge to put an engine in instead of doing actual diagnostic work!" (source. This guide will help you understand the potential timing chain issues on your vehicle, how to diagnose them, and what steps you can take to address them.

Symptoms

The most commonly reported symptom associated with the timing chain or its related components is a ticking noise coming from the engine. This ticking can vary in intensity and frequency, and it may be more noticeable at certain engine speeds or temperatures. Don't ignore unusual engine noises, as they often indicate underlying problems that need attention.

Pay close attention to when you hear the ticking. Does it occur only when the engine is cold, or does it persist even after the engine has warmed up? Is the ticking louder at idle or when accelerating? Providing specific details about the noise to your mechanic can help them diagnose the problem more accurately.

Ignoring this ticking sound can lead to more serious problems down the road. A worn or damaged timing chain guide can cause the timing chain to stretch or skip, potentially leading to engine damage. Timely diagnosis and repair are essential to prevent costly repairs. As another owner advised, "Probably your timing belt tensioner giving up. Not sure your mileage but I’d have that looked at ASAP because the timing belt service is cheaper than having a head pulled if the belt breaks and valves get kissed" (source.

It is also worth noting that some owners suggest paying attention to warning lights on the dashboard. As kongkid advised: "All im saying is NEVER ignore the wrench light or the oil light. Any autozone, orileys, advance auto, or mechanic shop can scan your codes usually for free." (source. Although they don't directly point to timing chain issues, warning lights can indicate other problems that might indirectly affect engine performance and potentially exacerbate existing timing chain concerns.

Most Likely Cause

Based on owner reports, the most likely cause of a ticking noise related to the timing system in your vehicle is a worn or failing timing chain guide. The timing chain guide ensures the timing chain runs smoothly and maintains proper tension. Over time, these guides can wear down, leading to the chain rattling or slapping against other engine components, creating the ticking sound.

The 2020 Honda Accord uses a timing chain, not a timing belt, in its engine. As one owner pointed out: "4 cylinder has a timing chain which, in theory, is designed to last the lifetime of the vehicle and should never need to be replaced. There is a timing chain tensioner which can be replaced if the chain starts to make a rattling noise." (source. While timing chains are designed for longevity, the components that support them, like the guides and tensioners, can wear out.

The timing chain guide's primary function is to keep the timing chain properly aligned and tensioned as it rotates around the crankshaft and camshaft sprockets. Proper tension is essential for maintaining accurate valve timing. Worn or broken guides can allow the chain to slacken or vibrate excessively, resulting in noise and potentially causing the engine to run poorly. In severe cases, a broken guide can cause the timing chain to jump a tooth, leading to significant engine damage.

How to Diagnose

Diagnosing a timing chain guide issue requires a systematic approach. The first step is to visually inspect the engine and listen for the source of the ticking noise. Here’s how you can proceed:

1. Gather your tools: You'll need a mechanic's stethoscope (or a long screwdriver can work in a pinch), a flashlight, and possibly a code reader.

2. Start the engine: Let the engine idle and listen carefully for the ticking noise. Try to pinpoint the area where the noise is loudest. The mechanic's stethoscope can be helpful here.

3. Inspect the engine: Look for any signs of oil leaks around the timing chain cover. While a leak isn't directly indicative of a worn guide, it can point to general wear and tear in the area.

4. Check for error codes: Use an OBD-II code reader to scan for any engine error codes. While there may not be a specific code for a worn timing chain guide, related codes (such as those related to camshaft or crankshaft position) could offer clues. As kongkid said, "Any autozone, orileys, advance auto, or mechanic shop can scan your codes usually for free." (source

5. Consider professional inspection: If you're not comfortable performing a more in-depth inspection, or if you're unsure of the source of the noise, it's best to take your vehicle to a qualified mechanic. They can use specialized tools and experience to diagnose the problem accurately.

6. Compression Test: While not directly related to the timing chain guide, a compression test can reveal if the valves have been damaged by timing issues.

7. Cylinder Leak Down Test: Similar to a compression test, this test can indicate if the valves are seating properly, which could be affected by timing chain problems.

Step-by-Step Fix

Replacing a timing chain guide is a complex repair that's best left to experienced mechanics. However, understanding the process can help you appreciate the work involved and discuss it intelligently with your mechanic. Here’s a general overview of the procedure:

1. Preparation: Disconnect the negative battery cable. Remove any components obstructing access to the timing chain cover, such as belts, hoses, and accessories.

2. Remove the Timing Chain Cover: Carefully remove the timing chain cover. This may involve removing bolts and potentially dealing with gaskets that are stuck in place.

3. Inspect the Timing Chain and Guides: Once the cover is off, thoroughly inspect the timing chain, guides, and tensioner for wear, damage, or breakage. Note the condition of each component.

4. Set Engine to Top Dead Center (TDC): Ensure the engine is at TDC on cylinder #1. This is crucial for maintaining proper timing when reassembling.

5. Remove Old Guides: Carefully remove the worn or damaged timing chain guides. This may involve unbolting them from the engine block or cylinder head.

6. Install New Guides: Install the new timing chain guides in their proper locations. Ensure they are securely fastened and properly aligned.

7. Inspect the Tensioner: Check the timing chain tensioner for proper function. If it's worn or damaged, replace it as well.

8. Reassemble: Reinstall the timing chain cover, ensuring a proper seal to prevent oil leaks. Reattach all removed components, such as belts, hoses, and accessories.

9. Verify Timing: After reassembly, double-check the engine timing to ensure it's correct. Use a timing light or other appropriate tool to verify the timing marks are aligned.

10. Test Drive: Start the engine and let it idle. Listen for any unusual noises. Take the vehicle for a test drive to ensure it runs smoothly and the ticking noise is gone.

As one owner shared: "Please get a second opinion from an independent mechanic, these don't die at 40,000 miles unless they've been extremely neglected. The timing belt is probably due to be replaced from age, not mileage." (source. This underscores the importance of getting a professional opinion to ensure the correct repair is performed.

Parts and Tools Needed

• New timing chain guide(s) (Honda Part Number - Consult your dealer for the exact part number for your specific engine)
• New timing chain tensioner (Honda Part Number - Consult your dealer for the exact part number for your specific engine)
• Timing chain cover gasket
• Assorted sockets and wrenches
• Torque wrench
• Mechanic's stethoscope
• OBD-II code reader
• Timing light (for verifying timing)
• Shop rags
• Engine oil

Real Owner Costs

The cost to replace a timing chain guide can vary depending on several factors, including the location of the repair shop, the extent of the damage, and whether any other components need to be replaced.

DIY: While technically possible, a timing chain guide replacement is NOT recommended as a DIY project unless you have extensive mechanical experience. The parts cost alone can range from $100 to $300, but the risk of improper installation and potential engine damage far outweighs any cost savings.

Professional Repair: Expect to pay between $800 and $1500 for a professional timing chain guide replacement. This includes the cost of parts, labor, and any necessary diagnostic work. The labor cost will typically be the largest portion of the bill, as the repair can be time-consuming.

Owner experiences suggest that getting a second opinion is always a good idea. Some dealerships may recommend replacing the entire engine, which can be significantly more expensive. Getting an independent mechanic to assess the situation can potentially save you a lot of money.

Prevention

While you can't completely prevent wear and tear on your vehicle's timing chain guides, there are steps you can take to minimize the risk of premature failure:

• Regular Oil Changes: Keep the engine properly lubricated with regular oil changes. Use the recommended oil type and change it according to the manufacturer's specifications.
• Avoid Harsh Driving: Avoid aggressive acceleration and high RPMs, as this can put extra stress on the timing chain and its components.
• Address Issues Promptly: If you notice any unusual engine noises, such as ticking or rattling, have them checked out by a mechanic as soon as possible.
• Maintain Cooling System: Ensure the engine's cooling system is functioning properly to prevent overheating, which can accelerate wear and tear on engine components.
• Follow Maintenance Schedule: Adhere to the recommended maintenance schedule outlined in your owner's manual. This includes inspections and replacements of key engine components.

What Owners Say

Real experiences from HONDA owners:

Success Stories

"Fixed it up and put a few thousand miles on it since then. Lots of mechanics, especially dealerships, just want to charge to put an engine in instead of doing actual diagnostic work!" — Admiral_Ackbar_1325 (source)

Owner Experiences

"Please get a second opinion from an independent mechanic, these don't die at 40,000 miles unless they've been extremely neglected. The timing belt is probably due to be replaced from age, not mileage." — Admiral_Ackbar_1325 (40,000 miles) (source)

"Any autozone, orileys, advance auto, or mechanic shop can scan your codes usually for free. Then they tell you what you need, or give you the code to look up and you get it fixed before it becomes a real problem." — kongkid (source)

"All im saying is NEVER ignore the wrench light or the oil light. Any autozone, orileys, advance auto, or mechanic shop can scan your codes usually for free." — kongkid (source)

Lessons Learned

⚠️ "Be careful who you purchase from. I bought one a year or so ago everything was great but the timing belt itself broke." — Darenpnw (source)

Real Repair Costs

"Timing belt is expensive if not already done ~$900 at independent shop. Unless you are looking for a project, just get the 4cy." — Infamous-Ad16 (source)

"Ball joints cause problems when they break, and it’s very common. Timing belt is expensive if not already done ~$900 at independent shop." — Infamous-Ad16 (source)

FAQ

Q: How long does it take to fix a timing chain guide issue?

A: The repair time can vary depending on the mechanic's experience and the extent of the damage. In general, expect the repair to take anywhere from 6 to 10 hours of labor.

Q: Can I drive with a ticking timing chain guide?

A: While it might be tempting to continue driving, it's not recommended. A worn timing chain guide can lead to more serious engine damage if left unaddressed. The timing chain could jump a tooth, causing valve damage or even complete engine failure. It is best to have the vehicle towed to a shop for repairs.

Q: Is this a common issue on the 2020 Honda Accord?

A: While not extremely common, timing chain guide wear is a known issue on these generations of Hondas, especially as the vehicle ages and accumulates mileage. Regular maintenance and prompt attention to unusual engine noises can help prevent major problems. As one owner noted: "These generations Hondas have timing belt issues more often than not. My ‘12 needed some work done around 55k after 5 years of owning it." (source. Keep in mind that this quote refers to a 2012 model, but the underlying issue with timing components is relevant.

Q: DIY vs mechanic - what's recommended?

A: Replacing a timing chain guide is a complex and time-consuming repair that requires specialized tools and knowledge. Unless you have extensive mechanical experience, it's best to leave this repair to a qualified mechanic. The risk of improper installation and potential engine damage is too high to attempt as a DIY project. While DIY fixes are tempting, some repairs require professional expertise.

Q: What other issues might mimic timing chain guide failure?

A: Low oil pressure, worn valve train components, or even exhaust leaks can sometimes create noises that resemble timing chain issues. A thorough diagnosis is essential to pinpoint the exact cause of the noise.

Q: How can I find a reputable mechanic for this repair?

A: Ask friends, family, or online communities for recommendations. Check online reviews and ratings for local mechanics. Look for mechanics who specialize in Honda vehicles or have experience with timing chain repairs. A reputable mechanic will be able to provide a clear explanation of the problem and the repair process.