How To “Read” A Spark Plug

The performance of the vehicle can be measured by reading the spark plugs as they provide valuable information and have the potential to detect every kind of problem that may surround it.
The reading of a spark plug involves evaluating the present conditions and colour of the tip of the plug. If a light tan colour exists around the tip of the spark plug, it indicates a healthy engine that is performing well. However, if the plug is of any other colour /condition, it indicates an issue cropping up, either with the engine including the fuel system, or maybe the ignition part.
Here’s how you can read a spark plug in a few easy steps:

Removal

Here, referring to the manual provided with the vehicle can prove to be a great help for the exact determination of the plug becomes easy, knowing the number of spark plugs is simplified and then, pulling them out isn’t tough anymore. For easy removal, you may use a ratchet socket drive wrench and an extension bar. Removing the spark plugs is important for deep inspection of the performance of the engine along with the vehicle.

Examine

A thorough examination of soot or carbon on the insulator of the spark plug can act as an indicator. Soot on the insulator or the central electrode signifies smooth running of fuel.

Available Deposits

If there is any kind of ash-like deposit on the spark plug’s insulator or even the central electrode, it indicates that there has been an excess of consumption of oil or other fuel additives. Calling an experienced and qualified mechanic should be held on priority for repairing the leak.

Blisters

Thorough verification of the existence of blisters should be done because their existence indicates a vacuum leak or some issues with the fuel, to repair which we need a qualified and professional mechanic.
Black Spots: Black spots on the nose of the spark plug indicate slight detonation. However, with the conditions turning severe, cracks and even chipping in the spark plug’s insulator can be seen. Hence, it should be diligently taken care of.

Regularity

Changing the spark plugs on a regular basis is important, as well as, necessary. However, it can always be recognized if the plug is old or new through the center electrode. With a worn-out spark plug, the engine of the vehicle is most likely to not run as efficiently as it would with a replaced and new one.
Reading a spark plug is like reading a book – the more you get involved, the more interesting it gets.

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