Test to Destruction! Single Coil vs. Dual Coil Glow Plugs (Turn on subtitles) (Read description)

Описание: (Note: Turn on subtitles)

Almost everyone likes to see things destroyed, so today we oblige with a scientifically conducted glow plug "test to destruction."

Purpose of Test: To reveal one of the benefits of dual coil glow plugs (and have a little fun)

The subjects:
On the left: A standard single coil glow plug from a well-known national brand. You would likely find this brand of glow plug in any local auto parts store.
On the right: A premium, dual-coil, USA Made glow plug from AccurateDiesel.com
Both glow plugs fit the 6.2L / 6.5L GM application, the principles apply to any application.

The test setup:
Both glow plug are connected directly to the same 12 volt battery at the same moment. There are no tricks - each is connected the same way and receiving the same voltage. When the video beings, the negative jumper cable is connected to the vise and both glow plugs are energized and begin heating.

Background: Single coil glow plugs typically do not have any self-regulating ability. If they are cycled too long, they will fail. A well-designed dual coil glow plug increases its resistance as the plug heats up in order to limit current flow and prevent catastrophic failure.

Time to watch the video!

Test Results: At 19 seconds into the video, the single coil glow plug is seem to emit a shower of sparks. What actually happened at this point is that the glow plug failed catastrophically. The sheath ruptured and material was ejected. At this point the glow plug begins cooling off. What about the dual coil glow plug? The video gets a bit boring at this point. It is still glowing happily away at 7 minutes and 38 seconds when my camera ran out of memory and the video stopped recording. I left the plug connected for several more minutes before getting bored of watching it and terminating the test.

Notes: There certainly is more to glow plug testing than a single 100% duty cycle test - since this is not the way glow plugs are used in real life most of the time, there are other factors to consider. Still, this test clearly indicates one of the big benefits of a quality dual coil plug. On an extra-cold winter day, it is not uncommon to have to cycle your glow plugs more than once to get an engine to start. Would the single coil glow plugs used in this test survive that double cycle? Questionable. Many people convert older engines to manual control when the factory automatic system fails. Cycling the plugs just a little too long is very easy to do when controlling manually - making dual coil plugs an essential choice for manual control as well.

If it's time for a set of new glow plugs..... https://www.accuratediesel.com/glow_p...