Replacing the spring in a glow plug

7Mile Sat Aug 03, 2019 2:51 pm

I have a high comp. glow plug but there’s an issue with it, the spring has been destroyed!
So I was wondering if there was any way to replace that, or if the plug is trash now. Thanks!

Ken Cook Sat Aug 03, 2019 2:59 pm

The coil is not replaceable therefore you need to purchase a new one.

944_Jim Sat Aug 03, 2019 3:55 pm

While the plug lost its glow, you may want to consider using it to create a turbo-plug adapter from it. I haven't tried it yet, but expect to once I blow a few plugs.
There is a thread over on RCG showing how to do it using a small drill press, cheap phillips-bit. And a rap. Apparently the phillips-bit has the right angle to allow the turbo-plug to seal.

Right now I have about four or five heads waiting for the treatment.

batjac Sat Aug 03, 2019 5:35 pm

7Mile wrote:I have a high comp. glow plug but there’s an issue with it, the spring has been destroyed!
So I was wondering if there was any way to replace that, or if the plug is trash now. Thanks!

Please explain destroyed. Usually when a glow plug goes bad, its bad. But occasionally the filament is just distorted and shorted to the side of the filament recess, and there is a possibility that it can be re-centered using a pin. I've used a t-pin in the past to re-center the filament and get a glow again.

The Off-Center Mark

7Mile Sat Aug 03, 2019 5:57 pm

batjac wrote:
Please explain destroyed. Usually when a glow plug goes bad, its bad. But occasionally the filament is just distorted and shorted to the side of the filament recess, and there is a possibility that it can be re-centered using a pin. I've used a t-pin in the past to re-center the filament and get a glow again.

The Off-Center Mark

The top half of the filament is simply gone, so I don’t think that could work.

Mark Diedrichs Sat Aug 03, 2019 6:11 pm

Just go to Cox international, they will hook you up with a brand new glow head and you'll be off and running!!! Don't stress, have fun, Mark

rsv1cox Sat Aug 03, 2019 6:52 pm

There are options, conversion or go diesel.

https://www.ebay.com/itm/049-Engine-Glow-Head-Adapter-Cox-Babe-Golden-Bee-Black-Widow-049-With-Plug/372416782188?hash=item56b5c51f6c:g:G3AAAOSwJAdcyfws

https://www.ebay.com/itm/049-051-Tee-Dee-Medallion-Babe-Bee-Diesel-Head-Conversion-Cox-049/371651854378?hash=item56882d402a:g:cOoAAOSwv-ZaA3-J

Or as Mark said, just buy another head. MECOA has them too, maybe a buck cheaper.

aspeed Sat Aug 03, 2019 9:11 pm

You will lose some power with the conversion plug unless it uses the turbo plugs, or Nelson style plugs. The high compression Tee Dee Cox ones are still available I think, and are good. I would not get the low compression ones myself. They are already pretty marginal on power. One thing that made Cox so popular was the fact that they used a dedicated head rather than a regular plug.

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Replacing the spring in a glow plug

Replacing the spring in a glow plug

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Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug

Re: Replacing the spring in a glow plug