12 August 2024 Why is my engine ticking?
There are certain parts that can emit a harmless ticking sound from time to time, such as the fuel injectors or engine valves. However, a persistent or loud ticking noise from the engine is not normal for most vehicles and is often a symptom of an underlying problem.
Don’t panic! It may be something as simple as replacing the spark plugs. The important thing is that you get it checked and repaired in good time. In this guide, you’ll learn the most common possible causes and how to finally stop the ticking in your car.
- Low oil levels or pressure
If your car is making an intense ticking noise when starting, accelerating or idling, for example, it could be caused by low engine oil levels or low pressure. This is because when the moving parts of the car motor, such as the valvetrain and timing components, aren’t getting enough lubrication, the friction between the metal parts increases and generates a loud ticking or tapping sound.
- Damaged, worn or misaligned engine valves
Speaking of the valvetrain, over time, the valves can become worn out or break, making it difficult for them to open and close at the right time. The clicking could also be caused from valve misalignment, in which case, they may just need an adjustment.
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- Exhaust leaks
If you notice a ticking sound while idling, be sure to check the exhaust system. A leak from the exhaust manifold can make a sound due to the high pressure in the system and any defective parts, cracks or loose bolts.
- A knocking engine rod
Inside your engine, there are small rods connected to the crankshaft. When their bearings go bad, the rods can move around more and knock against each other. This may result in a clanging, knocking or ticking noise when accelerating or decelerating. Make sure to fix the engine rod bearings in good time to prevent potential motor damage.
- Dirty or worn valve lifters
These parts are responsible for lifting the intake and exhaust valves open. Wear can occur after long periods of use. In this case, you may hear a distinct ticking or tapping noise coming from the engine, often known as “lifter tick”. These components can also move differently when they get dirty or there is a buildup of carbon or oily deposits.
- Bad spark plugs
Over time, spark plugs become worn down, dirty or rusty, causing them to be less effective at igniting the fuel-air mixture. You may notice that the engine idles rough, you have a poor fuel economy, and misfires start to occur, producing a ticking sound.
As a rule, most manufacturers recommend installing new spark plugs every 30,000 to 50,000 miles, although some premium types can last up to 150,000 miles.
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