Why Does Car Makes A Ticking Noise When Letting Off Gas?

If you are wondering what can be the reason behind this annoying ticking noise when letting off gas of your car? then you are on the correct page. In this article, we are going to discuss the real reason behind this cause and how to get it fixed properly in detail. Let’s get started with the article without any further delay.

Reasons Why You Hear Ticking Noise When Letting Off Gas?

A car engine will make noises and it is common after all there are many moving components and parts inside of a vehicle when it is running. Most of the sounds are very common and there is nothing to worry about. But it can be a problem for you if these noises start sounding a bit different or unusual.

In most cases, a ticking or tapping noise generally occurs from the two areas that are from the top of the motor or the axle shaft area of the car. The ticking noise can occur is because of a lack of oil lubrication in the top of the motor or because of the loose valve train hardware like lifters.

Let’s take an in-depth look into some common problems.

1. Bad Reciprocating Components:-

The reciprocating component is mostly responsible for ticking or tapping noises in the vehicle. When there is a ticking noise in the engine and it concerns a particular component, then it will usually be a reciprocating component that is to blame and not a rotating component.

Some examples of reciprocating components include pushrods, pistons, and valves. If any of these components are worn out, damaged, or go bad for whatever reason, you will begin to hear ticking noises. If you don’t replace these components in a timely manner, the ticking noises may progress into a whining or clunking noise.

2. Rod Knocking:-

The ticking sound is caused by the bearing attached to the rod having gone bad, then the rod will knock around and cause a ticking sound. This happens if you have a worn-out bearing because it will cause the rod to move. There won’t be any temperature changes to the engine, but the RPM of the engine will change.

3. Lack Of Oil Lubrication:-

Every engine needs oil between its moving parts to work smoothly. Oil not only reduces friction but, also carries away heat. If there is a lack of oil lubrication in the engine it will definitely lead to cause this type of ticking noise problem. The oil is the primary means by which the rod and main bearings as well as the pistons of the car are cooled.

4. Valves Not Adjusted:-

A valve train that is not adjusted will cause ticking sounds. When your engine spins a couple of times, the valves open and close. There is something called a rocker’s arm that is responsible for opening and closing the valves. The camshaft has a pushrod that controls the rocker’s arm and it needs to be the precise distance from the valve.

This is especially true because the valves move so fast and at a short distance. If the adjustments are not exactly right, then the components will move around and cause the ticking sounds.

5. Fuel Injectors Firing:-

Certain model cars with a fuel injection system will have ticking sounds whenever the fuel injectors start firing. These are basically the valves of the injectors that are quickly opening and closing in order to allow the proper fuel amount to enter the internal combustion chamber.

6. Damaged CV Joints:-

If a CV joint begins to fail while driving, your car will start to pull to one side as one wheel loses power. When the joint breaks completely its corresponding wheel will stop working completely. Although the engine may still run, the car will be unable to move. It is one of the basic reasons behind ticking noise when letting off gas issue.

7. Warped Rotor:-

If the car’s rotor is warped, even a little bit, every time the high point in the rotor comes around, it pushes the brake pads back against the caliper which is responsible for making the ticking sound.

8. Exhaust Leaks:-

When the fuel is combusted, it has to be expelled in a controlled manner. If there is a leak in the exhaust manifold, a ticking noise could be produced. An exhaust leak can occur anywhere in the exhaust system. However, if the leak is in the exhaust manifold, it may present a ticking noise from the engine compartment.

9. Bad Spark Plugs:-

Spark plugs that do not work properly, much like misaligned valves will cause the engine to misfire. If you have recently changed your spark plugs and hear a ticking sound it’s possible that the spark plugs were incorrectly installed.

If a spark plug is loosely fitted or cracked, the combustion and exhaust gases can bypass the seal, causing a ticking noise.

Hence these are some reasons which can be responsible for this ticking noise when letting off gas problem.

How To Resolve This Problem Of Ticking Noise?

Anyone car lover will clearly tell you that one of the best things about driving a car is hearing the sound of the engine roaring. Unfortunately, that “roar” can sometimes turn into a ticking noise. If you hear ticking or tapping noises when letting off the gas pedal then you can try to get fix this issue by following these methods.

Step 1:-

Firstly, check your oil level and ensure it is full because your vehicle most likely uses hydraulic lifters, which rely on oil pressure. Low engine oil leads to low pressure. If a lifter isn’t damaged then the increase in oil pressure will alleviate the noise you’re hearing. If it persists, use a heavier oil it will build a better pressure.

Step 2:-

Check if the noise occurs when downshifting and also see if the noise occurs in reverse or not. If it happens on letting off the throttle and having a little float on the gears, then the differential gears could be walking around.

Step 3:-

The Exhaust leak can simply be “patched up” by a mechanic. If the exhaust manifold gasket is leaking, you need to get it replaced at a relatively cheap cost.

Step 4:-

Adjust the valvetrain. It can be done as a DIY project if you have the necessary tools and patience. If you decide to let a professional fix it, it will cost you about $80 to $150.

Step 5:-

If the spark plugs are found to be bad, you need to either replace or repair. It can be expensive though.

Step 6:-

Check the bearing which is attached to the rod. If it is the reason behind this ticking issue you need to rebuild your entire motor.

Hence, these are some following resolving hacks for fixing these issues.


We hope the above-mentioned information will help the readers to learn more about this issue in detail. If anyone has any more doubts related to this problem feel free to comment in the comment section. We’ll definitely try to reach up to you and solve all your doubts as early as possible.

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