Re: Ignition coil exploded

[farna@xxxxxxx]

Make sure you have the CORRECT coil! Some coils have an internal resistance, others need an external resistor wire or ballast resistor. I forget which the 63 uses, but it DOES NOT have a resistor wire. Resistor wires came into heavy use in the 70s, maybe some in the late 60s, but not early. If you have a Delco starter and distributor the system should use a GM coil with built in resistor. I'm reasonably sure that's what you should have. If it uses an Autolite distributor, it will need a coil with external resistor (Ford type). I'm pretty sure you can swap the two. Most aftermarket "generic" coils don't have a built in resistance. Just use a ballast resistor with the coil. 


On October 30, 2004 Colin Brodsky wrote:

> Rather surprising noise in the driveway with my '63 Rambler Classic
> today... heard an explosion sound that at first sounded and looked like a
> radiator cap that blew, but once I opened up the hood, I found the ignition
> coil was blazing hot and apparently ruptured.  I have recently been through
> two ignition coils but both were old and I didn't know the history of them.
> The car has not been driven a lot; one lasted for quite some time and then
> the other died after a few days.  A new replacement exploded today - I had
> left the key in the on position without cranking for about 3 hours.
> 
> I'm now wondering if a '63 rambler classic needs a ballast resistor added
> to it  to prevent this?  I thought the wire to the coil was resistance wire
> and it wasn't needed.  The other coil that died quickly also seemed to be
> when I was working on the car and had left the key on quite a bit.  Seems
> like that is overheating the coil.
> 
> Any other possible causes?  The car starts and runs fine other than blowing
> up the coils!
> 
> -Colin
> 
> 
> 
> 
> .


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