Anyone have a coil crack?

[woodscavenger]

I have a new wiring system for american autowire and 12v conversion. I had a generic coil. Things ran well. I started and drove it 2 weeks ago then shut down to hand the front sheet metal. Tried to start it Saturday and had a dead battery:mad: Still have to figure that out. Charged it up and Sunday it sat and cracked with no sound of firing. Got looking around and saw a small white thing on the side of the coil looking like a peice of popcorn. It was hard as a rock. I unstrapped the coil and there is a crack running from the negative post down the side of the coil with this hard white blob sticking out.

Is there something I should be worrying about ( other than carrying a spare coil:D ) ???

[DanOlson]

Same thing happened to me when I inadvertently left the key on for an extended time and my coil exploded. It coated things under the hood with paper and molten something. Bounced the center of the coil off the floor and across the garage. I don’t recall exactly what point I was at with the re-wire.

Dan

[Merle Coggins]

Did you put a ballast resistor in the power supply to the coil? If not you over heated the coil with too much voltage. They can't take a full 12 volts continuously.

[grey beard]

If you kept your 6-volt coil and converted to 12 volts, I'm surprised it lasted that long. Twelve volt ignition systems need a ballast resister, as Merle pointed out.

Good Luck

[Phil Martin]

I always thought ballast resister goes between coli and dist. Thats how I had mine.

[Don Coatney]

I always thought ballast resister goes between coli and dist. Thats how I had mine.

The ballast resistor should be in line before the coil so it will reduce the voltage to the coil.

Some 12 volt coils have an internal resistor.