Causes of brown and yellow deposits on the spark plug insulator
Content
It is possible to reveal why soot forms on the body of the igniter only through a thorough diagnosis, a visual inspection rarely helps to solve the problem, but sometimes car owners can easily cope with the task.
After long-term use of igniters, drivers are faced with the fact that a brown coating forms on the spark plug insulator. This not only looks suspicious, but is also fraught with big problems. It is interesting for all people who are not accustomed to immediately seek advice from auto mechanics to find out the reasons for this, it will not be superfluous to also make out what yellow spots on the electrode and ceramics of the part mean.
Why does a brown rim form on the spark plug insulator
Most experts tend to agree: the fault of the raid is poor-quality fuel, which is not distinguished by the purity of impurities and the absence of deposits. Such problems in gasoline cannot be identified with the naked eye or by smell, but by looking at the spark plug insulator after some time of operation, everything will become obvious. The brown spots themselves may differ in hue and structure, only after a qualitative examination of the detail will it be possible to identify the exact causes of the suspicious excess.
What does this mean
Due to improper operation of the injector or carburetor, which has become malfunctioning after exposure to blockages from bad fuel, gasoline begins to flood the spark plug. As a result, a brown coating appears on the insulator, the electrode of an efficiently working part is simply not able to burn out an excessive amount of the supplied mixture, and part of it is impregnated through the metal case of the igniter to a more fragile component.
Causes of soot on the spark plug insulator
The brown rim is divided into several colors, as well as the structure of pollution. Based on this, you can accurately determine the faulty part of the car. A velvety dark shade indicates the penetration of the fuel mixture into the combustion chamber due to clogging of the air filter.
Brown stain on candles
A redder color means that the piston caps or rings need to be replaced, in which case the oily liquid enters the combustion chamber, leaving a rim on the insulator over time. The unsuitability of the caps for connecting the mass to the igniters is not ruled out, it is necessary to periodically replace these components.
What does the formation of yellow soot on the spark plug insulator indicate?
Seeing spots of such a characteristic shade, drivers often encounter problems when starting the engine. The reason is the same low-quality fuel, only in the mixture there is an increased presence of lead due to the unscrupulous attitude of the gasoline supplier to the creation of its products. If you refuel with such fuel for a short time, then irreversible changes in the operation of the vehicle can be avoided, another thing is when the driver ignores the manifestation. In addition to problems with candles, the owner of the car will face serious disruptions in the functioning of the entire power plant.
Reasons for the formation of yellow soot
According to experts and experienced auto mechanics, a driver can detect an unpleasant excess for the following reasons:
- Low engine efficiency.
- Problems with some individual details.
- Poor quality fuel.
On the electrode
Having found yellow marks on this part of the candle, you can safely check the correct operation of the valves or partitions in the cylinder, they may have worn out. Often, such manifestations are accompanied by drops of oil on the electrode and a small amount of metal chips. The system often begins to flood with fuel, and the car may begin to “troit” at the time of operation.
On ceramics
In addition to changing gasoline to a better sample, you need to think about the wear of the caps for feeding the igniters. These parts become excessively hard over time and cannot adhere as well to the ceramic housing without stopping to discharge when the engine is started.
