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Why does a spark plug turn black: car engine overhaul or garage repair

  • September 19, 2023
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Spark plugs are not only a key element of an internal combustion engine, without which the flammable mixture will not ignite, but also an important feature for monitoring

Why does a spark plug turn black: car engine overhaul or garage repair
Spark plugs are not only a key element of an internal combustion engine, without which the flammable mixture will not ignite, but also an important feature for monitoring the condition of the engine. Based on their condition and color of the plaque you can tell a lot about the health of the combustion engine. For example, black carbon deposits are a symptom of the need for repairs. Details are on the AvtoVzglyad portal.

The era of “once a year – to the service, once every three years – to the showroom” is over for the Russians, and control and maintenance of the car have become an integral responsibility of everyone who does not want to be a pedestrian. And it’s not just a matter of regular washing and quality maintenance: you also need to use your own eyes and hands. And the more often and more carefully the driver carries out an inspection, the greater the chance that a fault will be ‘detected’ at an early stage and repaired cheaply. Otherwise you can buy a pass.

An experienced driver will not hesitate to loosen and carefully inspect the spark plugs once a month. After all, they will tell you about problems with ignition, about increased consumption and about incorrectly selected oil. For example, black carbon deposits on a spark plug – often the only one of them all – indicate a malfunction better than any scanner: the engine is flooding. Moreover, for one cylinder. So what does this mean?

It’s too early to pull out your hair and call a tow truck – first you need to see what you can do yourself and with your own hands. First of all, we inspect the ignition coil or high-voltage wires, depending on the design of the combustion engine. Are you intact? And the tips that go directly to the spark plugs? If you cannot see it with your eyes, you can replace a “controversial” part, clean the spark plug – in no case with a brush or sandpaper, but with special chemicals – and continue the examination. Travel for a week and come back to the question next weekend.

No changes? Let’s dig deeper: Black carbon deposits on the spark plug are also a sign of a crowded injector. Sometimes they need to be cleaned, and often you can do this literally with your own hands: a special composition is poured into a plastic bottle, in which a pressure of three atmospheres is created using an ordinary car pump. We integrate it into the system, start it up and let it work. Then you need to change the engine oil.

Cleaning injectors on a homemade stand is a good thing, but unfortunately not always effective. It so happens that you have to remove it and take it to a professional stand, where the “forces” are cleaned, adjusted and, if necessary, rebuilt. By the way, there is often a rubber seal under the nozzle – it’s time to replace it.

There is a good chance that after the procedures described above, the engine will come to life, appetite will decrease, begin to work more smoothly, and the candle will no longer turn black. Such diagnostics are not difficult and can be done by anyone, but it allows you to save a lot on maintenance and extend the service life of the engine. Therefore, this should be done as soon as possible.

Photo globallookpress.com

The era of “once a year – to the service, once every three years – to the showroom” is over for the Russians, and control and maintenance of the car have become an integral responsibility of everyone who does not want to be a pedestrian. And it’s not just a matter of regular washing and quality maintenance: you also have to use your own eyes and hands. And the more often and more carefully the driver carries out an inspection, the greater the chance that a fault will be ‘detected’ at an early stage and repaired cheaply. Otherwise you can buy a pass.

An experienced driver will not hesitate to loosen and carefully inspect the spark plugs once a month. After all, they will tell you about problems with ignition, about increased consumption and about incorrectly selected oil. For example, black carbon deposits on a spark plug – often the only one of them all – indicate a malfunction better than any scanner: the engine is flooding. Moreover, for one cylinder. So what does this mean?

It’s too early to pull out your hair and call a tow truck – first you need to see what you can do yourself and with your own hands. First of all, we inspect the ignition coil or high-voltage wires, depending on the design of the combustion engine. Are you intact? And the tips that go directly to the spark plugs? If you cannot see it with your eyes, you can replace a “controversial” part, clean the spark plug – in no case with a brush or sandpaper, but with special chemicals – and continue the examination. Travel for a week and come back to the question next weekend.

No changes? Let’s dig deeper: Black carbon deposits on the spark plug are also a sign of a crowded injector. Sometimes they need to be cleaned, and often you can do this literally with your own hands: a special composition is poured into a plastic bottle, in which a pressure of three atmospheres is created using an ordinary car pump. We integrate it into the system, start it up and let it work. Then you need to change the engine oil.

Cleaning injectors on a homemade stand is a good thing, but unfortunately not always effective. It so happens that you have to remove it and take it to a professional stand, where the “forces” are cleaned, adjusted and, if necessary, rebuilt. By the way, there is often a rubber seal under the nozzle – it’s time to replace it.

There is a good chance that after the procedures described above, the engine will come to life, appetite will decrease, begin to work more smoothly, and the candle will no longer turn black. Such diagnostics are not difficult and can be done by anyone, but it allows you to save a lot on maintenance and extend the service life of the engine. Therefore, this should be done as soon as possible.

Source: Avto Vzglyad

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