The Ford Barn

1crosscut · 11-16-2020, 08:16 PM

I've started working on cleaning up some C-4 spark plugs. After taking several of them apart I've noticed that there are numbers towards the bases of the porcelain that are hidden when they are assembled. Most have a number but some do not.
Any idea as to what the numbers represent?

J Franklin · 11-17-2020, 01:19 AM

Pre bar code

katy · 11-17-2020, 12:02 PM

I would guess some sort of production code.

1crosscut · 11-18-2020, 06:57 PM

A mystery that may never be solved.

Sunnybrook Farm · 11-18-2020, 09:32 PM

Probably which machine made the part, if there was a problem they would want to know where it was coming from.

katy · 11-19-2020, 11:34 AM

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Have you tried contacting Champion?

11-17-2020, 01:19 AM	#2
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,370	Re: Numbers on C-4 spark plugs Pre bar code

11-17-2020, 12:02 PM	#3
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,716	Re: Numbers on C-4 spark plugs I would guess some sort of production code. __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

11-18-2020, 06:57 PM	#4
1crosscut Senior Member Join Date: Feb 2011 Location: Lincoln, Nebraska Posts: 2,011	Re: Numbers on C-4 spark plugs A mystery that may never be solved. __________________ Dave / Lincoln Nebraska

11-18-2020, 09:32 PM	#5
Sunnybrook Farm Senior Member Join Date: Oct 2015 Location: Virginia Posts: 409	Re: Numbers on C-4 spark plugs Probably which machine made the part, if there was a problem they would want to know where it was coming from.

11-19-2020, 11:34 AM	#6
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,716	Re: Numbers on C-4 spark plugs Sponsored Links (Register now to hide all advertisements) Have you tried contacting Champion? __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!