What Does Black Carbon Deposits on Spark Plugs Mean

It is essential that during the planned replacement of spark plugs, the new spark plug also has the same characteristics as recommended by the car manufacturer.  With the right kind of spark plugs, you can forget about the malfunctions for a long time and save yourself from giving tidy sums to the diagnosticians.

Prediction of the state of the power plant by the color of carbon deposits of spark plugs

It is not complex to check the spark plugs condition by the colour of the carbon deposits. Their gradation depending on the color of the working surface, is as follows: 

• Light brown.
• Light gray.
• Black.
• Red.
• White.

The spark plug of a normally functioning maintained engine with the adequate economy creates a creamy brownish or powdery grey colour. It also signifies that the engine either does not eat oil, or its consumption is comparable to the factory recommendations. From the colour of the spark plug, it can be concluded that the glowing number of the lighter corresponds to the indicator laid down in the engine’s design.

Most often, professional mechanics of the car service station in Mumbai are in a hurry to warn those owners who like to add additives to the fuel. Excess additive doses cause the reddening of the spark plug electrodes to the level of a red brick hue. It is very easy to prevent such occurrences – it is enough to stop using automotive chemicals, change gasoline.

If there is solid confidence that the supplement is normal, then the malfunction’s root cause may be an overdose. By reducing, the additional products added to the fuel is a sure way to eliminate red plaque. It will be the only correct one if it does not contain manganese and lead prohibited for use. There are multiple instances when the concentration of the metal-containing substance in fuel and at gas stations exceeds the norm. In such a state of affairs, it is worth considering changing the fuel source. 

Black plaque – what is it?

Usually, it is the black carbon deposits on spark plugs that form most often. There are two types of black soot – the structure of the plaque is also different. If the plaque has a greyish tint, do not worry – this is a sign of the stability of the engine. 

If the threaded or electrode connections are covered with oily soot, this indicates that too much-working fluid is in the combustion chamber when the engine is operating. Such an occurrence has a concomitant symptom: blue smoke begins to come out of the exhaust when the engine is running. There are various possible reasons for such occurrence:

• Valve sleeves are worn out
• The piston caps are worn out.
• The piston rings have become unusable,

The formation of black carbon deposits on the spark plug is related to the wear of the components of the cylinder-piston system. This issue is resolved by replacing the worn-out parts with new ones. 

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