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Author Topic: old coil kwestyun  (Read 3034 times)

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Offline HeelSpur

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old coil kwestyun
« on: May 29, 2013, 06:24:59 PM »
what is the black stuff inside these old coils?


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RooK E

Offline Papaw

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Re: old coil kwestyun
« Reply #1 on: May 29, 2013, 06:45:00 PM »
Quote
Formerly, ignition coils were made with varnish and paper insulated high-voltage windings, inserted into a drawn-steel can and filled with oil or asphalt for insulation and moisture protection. Coils on modern automobiles are cast in filled epoxy resins which penetrate any voids within the winding.
Wiki- http://en.wikipedia.org/wiki/Ignition_coil
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Offline Ken W.

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Re: old coil kwestyun
« Reply #2 on: May 30, 2013, 12:08:24 AM »
Don't forget the PCB's.
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Offline HeelSpur

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Re: old coil kwestyun
« Reply #3 on: May 30, 2013, 06:37:05 AM »
Quote from: Papaw on May 29, 2013, 06:45:00 PM
Quote
Formerly, ignition coils were made with varnish and paper insulated high-voltage windings, inserted into a drawn-steel can and filled with oil or asphalt for insulation and moisture protection. Coils on modern automobiles are cast in filled epoxy resins which penetrate any voids within the winding.
Wiki- http://en.wikipedia.org/wiki/Ignition_coil
Asphalt, I guess whatever gets the job done, thanks.
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Offline rusty

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Re: old coil kwestyun
« Reply #4 on: May 30, 2013, 04:30:41 PM »
Too early for PCB's, they hadn't invented them yet, but they used more or less the same gunk in florescent light fixture ballasts later , with PCB's....

Asphalt and coal tar were among the few things that would keep water from getting into the windings...
(Paper loves water)

Unfortunately, it also burns , and melts in really hot engine compartments...
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Just a weathered light rust/WD40 mix patina.

Offline strik9

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Re: old coil kwestyun
« Reply #5 on: June 01, 2013, 11:46:02 PM »
Which is exactly why the early Ford T's had them on the firewall inside the driver's area.
    Those can be completely undone and rebuilt back to like new.    Some are quite hard to find, the mid to late T versions quite easy.
 
  Those who restore old hit and miss flywheel engines like to use those to fire the spark plug also.
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The only bad tool is the one that couldn't finish the job.  Ironicly it may be the best tool for the next job.
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