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How to repair engine knocking noise especially when idling

August 11, 2016 | Car Repair & Cost

How to repair engine knocking noise when idling

If you turn on your car and hear knocking noises, this usually means the fuel of the car was not ignited properly. This could be due to low-quality fuel, cylinder wall deposits, or bad spark plugs. If the problem is not fixed fast enough then it could damage the components of the engine, which would mean you’d have to purchase a whole new engine. Instead of spending thousands of dollars on replacing the engine, it would be much cheaper to just repair the knocking noises in the engine before they do damage.

Read also: How to prevent your engine from overheating

Before taking your car to an automotive shop for an expensive diagnosis, there are a few steps you can take to try and get the knocking to go away. The first step is to use better quality fuel. Look in the owner’s manual of your car and see what the octane rating of your fuel is supposed to be. Then make sure you pump fuel into your car which has the same octane rating. If you own a standard economy class car then most gas stations will have the right fuel for it. But if you drive a high-performance car then you’ll need premium fuel for it.

Next, you’ll want to flush out your cylinders in case they are dirty. This dirt is actually carbon residue that comes from the carbon components of gasoline. As you use up your gasoline, small amounts of carbon deposits find their way onto your cylinders and will build up over time. That is why you need to periodically flush them out before the buildup is too severe. To do this, add a cleaning additive or detergent to your gasoline. The most common one is a fuel injector cleaner which cleans the residue from the combustion chambers and injectors.

 If you still hear the knocking noises in your engine, then check to make sure you are using the right spark plugs for your vehicle. To find this out, you’ll have to remove the spark plugs first and then rewrite down the model numbers that are stamped into them. Compare these model numbers to the numbers listed in your owner’s manual. If the numbers match then you are using the right spark plugs. If they don’t match then you need to install new spark plugs that have those serial numbers.

A lot of these tasks require knowledge of cars and the use of mechanical tools. If you are a novice then you should have a professional mechanic do these tasks for you or else you could risk damaging your car even more.

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