Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Long Does a Glow Plug Last?

How Long Does a Glow Plug Last?

glow plugs

A diesel engine is a very powerful and complicated piece of machinery. There are a variety of things that have to work together in order for the diesel engine to fire off and run as intended. Just like a gasoline engine, the diesel engine will need a spark to initiate the combustion process. Without this spark, the diesel engine will not be able to fire and run. The glow plug releases a small spark of electricity when the key is turned over. Every time that the diesel vehicle is started, the glow plugs will have to do the job they are intended for. However, while a gasoline engine needs the spark plugs to fire continuously during operation, a diesel engine uses compression and heat, not the glow plugs, to maintain combustion.

The glow plugs on a diesel engine will usually last around a 100,000 miles but can fail before then. Making sure that the right quality glow plugs are put in your vehicle is important in keeping it consistent and reliable. When the glow plugs begin to fail, there will be a variety of different issues that may arise. Neglecting to act when signs of glow plug trouble arise can leave you stranded. The longer that you wait to have the glow plugs replaced, the more damage you will have to contend with. The time that is put into getting the right professional help will be worth it considering the functionality a new set of glow plugs can provide. Due to the constant use that the glow plugs in an engine get, it is easy for them to become worn over time. In most cases, the glow plugs on a diesel vehicle will not get much attention until they are malfunctioning. It is your job to make sure that the signs of worn glow plugs are noticed and that you act quickly to get them replaced.

The following are some of the signs that you will notice when it is time to have your glow plugs replaced:

  • The diesel vehicle is hard to start during cold weather
  • There is more smoke coming from the vehicle than normal
  • The diesel engine is misfiring on a regular basis
  • Decreased fuel efficiency

Having a professional replace the glow plugs is your best course of action due to the complexity that is involved in this process.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...


Related questions

Q: C4500; 6.6 2007 diesel shut down while driving, turns over but won't start

Hello there, thank you for asking about your Chevrolet truck. There are a variety of things that could cause this as the Duramax diesel trucks have over 20 onboard computers. Without additional information as to trouble codes or other symptoms...

Q: Getting a p138b code - should I just replace the GPCM? I think a nearby lightning strike may be the culprit.

Hi there. If the codes for the engine are coming up with the glow plug control module failure, then check the module to see if there is any wiring burned or broken. If there is nothing wrong with the harness...

Q: My car wont start.

Hello. We will be happy to assist you. It sounds like you have a common failure, a faulty ignition switch or lock cylinder. Both the ignition switch and lock cylinder have four positions, Off, On, Accessory, and Start. Each position...