The role of the spark plugs is to promote internal combustion with the engine’s ability to start and run. Spark, fuel, and compression are the three elements that are responsible for running the engine and usually, mechanics or technicians look for these elements at first in any car if it is not running.
Also, maintenance and replacement of wearable components, such as spark plugs are important to keep the vehicle running smoothly. One more thing that you should always keep at the top of your mind is that, depending on your vehicle and the type of spark plug, you should replace spark plugs every 20,000 to 40,000 miles. Besides this, don’t forget to check for your vehicle’s maintenance schedule, which can be normally located with your vehicle’s manual and maintenance books in the glove compartment, this will let you know how often the recommended replacement interval is for your vehicle’s spark plugs.
What does it mean if a spark plug turns black?
If a spark plug turns black it means the air/fuel ratio for the spark plug’s cylinder is too rich (meaning too much fuel or not enough oxygen) or it could also mean that too much oil is making its way into the cylinder.
How to fix these oil-covered spark plugs?
Spark plugs present in your vehicle that have turned black and are also happen to be oil-covered could mean that there are faulty gaskets, or even worse have severely broken internal engine components. Therefore, it is recommended that you schedule your vehicle for a mechanical inspection as soon as possible. Below mentioned are a few possible reasons for oil-covered spark plugs, including these worn or broken components:
- Valve cover gasket
- Head gasket
- Valve guide seals
- Spark plug tube o-rings
- Worn piston rings
- Cracked piston
- Cracked head
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