Q: What Wears Out Engine Spark Plugs?

asked by on

What wears out engine spark plugs?

Spark plugs are used to ignite the air/fuel mixture in the combustion chambers of every engine. The plugs are subjected to extreme heat, combustion pressures, and vibration. These are just some of the factors that contribute to spark plug wear.

The most wear to spark plugs is done from creating the electric arc that ignites the air/fuel mixture.

Spark plugs each have two electrodes; one electrode in the center of the plug and a side electrode. As the electricity jumps from one electrode to the other, the electrodes start to erode from the process. Over time, the electrodes wear away.

The copper core spark plugs of old typically lasted for about 30,000 miles before needing replacement. With today’s modern materials (platinum and iridium), spark plugs last about 100,000 miles before needing replacement.

If your vehicle is due for spark plug service, seek the assistance from a professional mechanic who can do the job at your convenience.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What Wears Out Engine Spark Plugs?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car shakes violently and 'check engine' flashes

Since you are only getting a misfire on cylinder number 3 specifically, this informs me that the cylinder ignition is not the problem. Since the engine has a coil pack that powers two cylinders at the same time and if...

Q: How Do Spark Plugs Work in an Engine?

Spark plugs are used to ignite the air/fuel mixture in the combustion chambers of every internal combustion engine. To accomplish this, spark plugs have two electrodes between which a high voltage spark will jump. One electrode is located in the...

Q: Possible starter replacement.

If the starter needed replacement the symptoms you would have would be that all the lights and electrical functions of the vehicle would still work correctly and when you tried to start the engine your'd hear only a slight click...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.