What Are Glow Plugs?

December 28, 2022

WHAT ARE GLOW PLUGS?

Glow plugs are an automotive heating device used in Diesel engines. A glow plug’s job is to aid the diesel engine in starting. Plugs are more vital on cold days.

Plugs are metal, pencil-shaped, 1/4 x 32-thread, automotive devices that emit light in order to aid diesel engines. Plugs have a similar heating element to a toaster.

GLOW PLUG HISTORY 

Glow plugs were invented in 1929. The company DENSO made the first Diesel plugs. The first glow plugs were very thick. They also had high-temperature capability. Normally, these glow plugs would require low voltage levels to operate properly.
 In the 1980s, new plugs were invented. These plugs were called “fast glow plugs”. These glow plugs were able to heat, and start up a diesel engine in a total of ten seconds!
In the late 90s, all plugs were used in prechamber diesel engines. This meant- that plugs and injectors would all fit into the chamber instead of the engine head.

HOW LONG DO GLOW PLUGS LAST? 

On average, plugs last 100,000 miles. During this period, they will slowly deteriorate because of wear and tear. The good news, plugs are long-lasting. Meaning; that you won’t have to worry about them as much as your other automotive features.

WHY DO PLUGS FAIL?

Most plugs last until their estimated due date. If by chance, they don’t, it could be because of the engine overheating, the pistons are damaged, your valves are broken, or plugs erosion. These are all the most common reasons that plugs would fail.

Erosion could be caused by injectors dripping down onto the plugs, causing them to slowly deteriorate. Also, if all of your plugs magically fail at the same time, it is because something is going on in the engine department of your vehicle.

glow plugs
WHERE CAN I GO TO HAVE MY PLUGS REPLACED? 

Plugs need to be replaced every 100,000 miles or, sometimes before that. Tedious Repairs can help you with that! We offer glow plug replacement on all diesel vehicles! Plugs commonly last until their due date, 100,000 miles. But, if they need to be replaced before that, bring your vehicle to Tedious Repairs. They offer fast, affordable, 5- star, automotive repair and all automobiles in the Chico community!

Buddy Rausch

Buddy Rausch

Buddy started his auto career journey at Butte College and started his own auto repair company in 2007. Since then he has worked on countless cars, diagnosing, repairing, and replacing worn, faulty, and broken parts.

After a few years, he moved to a bigger shop to accommodate his growth and to better serve the Chico, CA community. It’s a family-owned & operated business.

Outside of work Buddy enjoys spending time with his family and playing softball is one of his many passions.

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