Why do Hondas need valve adjustments?

Hondas, like many internal combustion engine vehicles, require periodic valve adjustments to maintain optimal engine performance and efficiency. This process involves checking and adjusting the clearance between the engine's valves and camshafts, ensuring proper valve timing and operation.

The Importance of Valve Adjustments in Hondas

Valves play a crucial role in the operation of an engine, controlling the intake of air and fuel, as well as the exhaust of spent gases. Over time, the clearance between the valves and camshafts can change due to normal wear and tear, affecting the engine's performance and fuel efficiency. Proper valve adjustment ensures that the valves open and close at the correct times, allowing the engine to operate at its best.

When to Perform Valve Adjustments on Hondas

Honda recommends that valve adjustments be performed at specific mileage intervals, typically every 30,000 to 60,000 miles, depending on the model and driving conditions. This maintenance task is often included in the manufacturer's recommended service schedule, and it's important to follow these guidelines to maintain the health and longevity of your Honda's engine.

Signs That Your Honda Needs a Valve Adjustment

There are several signs that may indicate your Honda's valves need adjustment:

• Decreased engine performance: If you notice a drop in power, acceleration, or fuel efficiency, it could be a sign that the valves need adjustment.


• Unusual engine noise: Ticking, clicking, or other unusual noises coming from the engine may be a sign of valve issues.


• Difficulty starting the engine: Valves that are out of adjustment can make it harder for the engine to start, especially when the engine is cold.

If you notice any of these symptoms, it's best to have your Honda inspected by a qualified mechanic to determine if a valve adjustment is necessary.

Performing Valve Adjustments on Hondas

Valve adjustments on Hondas typically require specialized tools and knowledge, and it's generally recommended to have this maintenance performed by a professional mechanic. The process involves carefully measuring the clearance between the valves and camshafts, and then adjusting the valve lash (the gap between the valve and the camshaft) to the manufacturer's specifications.

Attempting to perform valve adjustments without the proper tools and expertise can lead to further engine damage, so it's important to leave this task to the professionals unless you have the necessary skills and experience.

How much is a valve adjustment on a Honda Civic?

The cost to adjust the valves on a Honda Civic ranges from approximately $150 to over $600, depending on whether you go to an independent mechanic or a dealership, and what other services are included. A common range for a local or independent shop is $150-$300, while dealership prices are often higher due to labor rates. Some quotes have been as high as $611 or more for the adjustment alone, not including other services. 
Factors affecting the cost

• Labor costs: Dealerships typically charge higher hourly labor rates, which can significantly increase the final price. 
• Parts: The cost of a new valve cover gasket and the specialty shims, if needed, will be added to the total. 
• Additional services: The price will be higher if you have other work done at the same time, such as spark plug replacement, which is often recommended during a valve adjustment. 
• DIY vs. professional: If you are mechanically inclined, you can perform the adjustment yourself for the cost of parts and tools, which can be significantly cheaper. 

How to get a more accurate estimate

• Call local independent shops: Get quotes from several independent mechanics in your area, as they are often more affordable than dealerships. 
• Contact your local Honda dealership: Get a quote for the service from your local dealership to compare against other options. 
• Ask about package deals: Inquire if they offer a bundled price for a valve adjustment and spark plug change, if that's a service you need. 

Why do Honda's need valve adjustment?

One of the primary benefits of regular valve adjustments is the extension of your engine's lifespan. Proper valve clearance minimizes wear and tear on engine components, preventing premature failure and ensuring that your engine remains in top condition for longer.

What are symptoms of valves needing adjustment?

Symptoms of a needed valve adjustment include ticking or rattling noises from the engine, rough idling or misfires, and a loss of engine power or fuel efficiency. Other signs can include hard starting, backfiring, or a noticeable drop in engine performance. 
Auditory symptoms

• Ticking or rattling: A metallic tapping, clicking, or clattering sound, especially from the top of the engine, is a common sign of valves that are too loose. 
• Backfiring: This can occur when valves are not sealed properly, sometimes with an unusually loud roar at higher speeds. 

Performance symptoms

• Rough idle: A shaky or inconsistent idle can result from valves not opening and closing at the correct time. 
• Misfires: The engine may feel like it's "missing" or sputtering, particularly when cold. 
• Loss of power: You may experience sluggish acceleration or a general decrease in the engine's responsiveness. 
• Poor fuel efficiency: An engine that isn't running efficiently due to improperly adjusted valves will often use more fuel. 
• Hard starting: A valve that isn't sealing well can lead to compression loss, making the engine more difficult to start, especially when cold. 

Other indicators

• Blue smoke: If a worn valve lets oil leak into the combustion chamber, it can result in blue smoke coming from the tailpipe. 
• Decreased oil level: Worn valve seals can contribute to increased oil consumption, so a dipstick reading that gradually lowers could be a clue. 

Do I really need a valve adjustment?

Ignoring valve adjustments can have dire consequences for your engine. Tight valve clearance can result in loss of compression, reduced power, and increased fuel consumption, while loose clearance can cause valve noise, poor idle quality, and even valve float, where the valves fail to close properly.