knocking sound under car when driving

Knocking Sound Under Car When Driving-A Complete Guide

by

Jeffrey
August 10, 2022
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When you’re driving and you hear a knocking sound under car when driving, it can be worrying.

You might not know what’s causing the noise, and you might be concerned that there is something wrong with your vehicle. 

In this article, we are going to discuss the most common causes of knocking sounds under cars, and we will provide you with a guide on how to fix them. 

We hope that this information will help you to keep your car in good condition and avoid expensive repairs!

Knocking Sound Under Car When Driving-Causes

Knocking Sound Under Car When Driving-A Complete Guide

So we can solve the problem, let’s examine what could be the culprit.

Damaged Suspension Components

One of the most common causes of knocking sounds under cars when driving is loose or damaged suspension components.

If your car’s suspension is not in good condition, it can cause the car to bounce around on the road, which can lead to knocking sounds. 

You might also notice that your car doesn’t handle as well as it used to, and you might see more wear and tear on your tires.

If you think that your car’s suspension is causing knocking sounds, you should take it to a mechanic and have it checked out.

Worn Engine Mounts

Another common cause of knocking sounds under cars when driving is worn engine mounts.

Engine mounts are designed to keep the engine in place, but over time they can become worn or damaged and you have to replace worn engine mounts. 

If your driveshaft breaks while driving, it can cause the engine to move around, which can lead to a knocking sound under car when driving.

You might also notice why your car vibrates more than it used to, and you might see more wear and tear on your engine parts.

If you think that your car’s engine mounts are causing knocking sounds, you should take it to a mechanic and have them checked out.

Air Conditioning System Issues

Another potential cause of knocking sounds coming from under your car is an issue with the air conditioning system.

In some cases, the compressor can become loose and start to knock against other parts of the engine. 

You might also notice that your car’s air conditioning isn’t working as well as it used to, and you might see more wear and tear on your engine parts.

If you think that your car’s air conditioning system is causing knocking sounds, you should take it to a mechanic and have it checked out.

Blend Door Actuators

Another potential cause of knocking sounds under your car is a problem with the blend door actuators.

The blend door actuators are responsible for controlling the airflow in the cabin, and if they become damaged or worn, they can start to make knocking sounds. 

You might also notice that your car’s air conditioning isn’t working as well as it used to, and you might see more wear and tear on your engine parts.

If you think that your car’s blend door actuators are causing knocking sounds, you should take it to a mechanic and have them checked out.

While there are many potential causes of knocking sounds under cars, these are some of the most common ones.

If you hear knocking sounds under your car, don’t panic!

In most cases, the cause is something minor that can be easily fixed. 

However, if the noise is persistent or if you notice other problems with your car, we recommend taking it to a mechanic for a thorough inspection.

With their help, you can get to the bottom of the problem and make sure that your car is in good condition.

Is Sound An Indication Of A Problem?

Knocking Sound Under Car When Driving-A Complete Guide

Not all knocking sounds indicate a problem.

Sometimes, knocking sounds may be due to normal driving conditions or even the type of road you’re driving on.

For example, you might hear knocking sounds when driving over bumps or potholes. 

This is because the suspension is designed to absorb impact and prevent it from being transferred to the rest of the car.

In most cases, this is not causing for concern. 

However, if you hear persistent knocking noises or if you notice other problems with your car, we recommend taking it to a mechanic for a thorough inspection.

With their help, you can get to the bottom of the problem and make sure that your car is in good condition.

To get more information you can read our detailed guide on: How Many Spark Plugs Does A Diesel Have?

FAQs:

Q: What Could Be Causing A Knocking Noise Under My Car?

A: There are a few different potential causes, but the most common are loose suspension components or an exhaust leak.

Q: How Can I Fix A Knocking Noise Under My Car?

A: Start by checking your suspension and tightening any loose bolts.

If that doesn’t work, try inspecting your exhaust system for leaks.

Q: Should I Take My Car To A Mechanic If I’m Still Having Trouble?

A: Yes, if you’ve tried all of the above and the knocking noise persists, then it’s time to visit a professional.

They’ll be able to diagnose and fix the problem quickly.

Final Thoughts:

If you’re still having trouble after trying all of the above, then it’s time to take your car to a professional mechanic.

They’ll be able to pinpoint the exact source of the knocking noise and make the necessary repairs. 

Don’t ignore a knocking sound under car when driving, as it could be indicative of a serious problem.

Use this guide to troubleshoot the issue and get your car running smoothly again.

Thanks for reading!

Jeffrey

Jeffrey Bryce is an experienced motorcycle rider with years of experience caring for motorcycles. His natural fondness for motorcycles have made him come up with LetsGoForARide.com, which is dedicated to answering and teaching you how to care for your bike with the care it requires. LetsGoForARide is the one of his important lifework in reaching out to communities of motorcycle enthusiasts on how to take care of their bike and choosing the correct spare part.