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EFV-8 Club Forum / General Ford Discussion / HOT COIL

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Discussion Topic: HOT COIL -- page: 1 2

Stroker

08-30-2018 @ 1:15 PM

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Posts: 1460
Joined: Oct 2009

I agree, the dist needs to be set up on a Heyer or equivalent machine.

autoluke

08-30-2018 @ 11:23 AM

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Ran the engine for 30 minutes with the coil removed from the collar .
The collar reached 170 degrees quickly, as the heat had a direct path from the securing head bolt.
The coil, although hot, reached only 133 degrees as separated from all transfer points, which leads me to believe that this contributed to my earlier problems.

Next step will be to fashion a new coil bracket to be mounted well away from the engine..
I will be sure to report later, after many road miles will provide a real test.

Drbrown

08-30-2018 @ 9:45 AM

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My 12v coil is mounted in a metal band near my left hand radiator hose. Over the years I've had both Bubba and Charlie NY rebuild and set-up my distributors, using my coils,, and most recently bought a "Blue Flame" coil from Charlie. As mentioned to both guys, my coils have always felt "hot" but everything keeps working so I disregard it. Some of that "heat" obviously comes from the engine compartment. I remember (but never owned) a coil that had a metal casing with cooling fins on the outside .

TomO

08-30-2018 @ 7:59 AM

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In 42-48 cars the coil bracket was mounted to the intake bolts at the left fron of the engine. You could try to find one of those brackets to mount your coil.

Another cause of overheating the coil is incorrect point dwell. The 41 distributor requires 36 degrees of dwell, I suggest that you check your dwell and if it is incorrect or changes at speed, have your distributor set up on a distributor machine by a competent operator like Supereal of Cliff Green.

Tom

autoluke

08-30-2018 @ 7:20 AM

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Started by installing the NAPA coil which, I might add, is larger in diameter than the Mac

Ran fine for an hour, but noted that it became hot like the previous one.
Finally realized that the steel retaining collar provided a direct heat path from the head..no wonder that it is hot.

Next move will be to remove the collar and see if things cool off.

autoluke

08-28-2018 @ 7:39 AM

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I'll take your suggestion, but am anxious to see if the Mac and NAPA offerings survive.

I realize that this might be a long term study, but I am anxious to have it correctly resolved.

Stay tuned.

40 Coupe

08-27-2018 @ 5:03 AM

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Don't send Skip an aftermarket coil to rebuild. If you don't have an original 41 Coil ask skip if he can supply one. The original coil fits on top of the distributor. Also ask for a tested good condenser.

autoluke

08-26-2018 @ 2:44 AM

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Looks like I will take the roll as a test lab.

I will try both the Mac and the NAPA..both with the resistor bypassed.

TomO

08-25-2018 @ 9:24 AM

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Rather than send your coil to Skip to be rebuilt, you can get a quality 6 volt positive ground coil at NAPA. The NAPA part number is ECH IC7. This is not a "fitzall" coil like Macs sells.

Tom

autoluke

08-25-2018 @ 8:30 AM

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The coil I am sending to Skip appears to be a replacement, rather than an original.
Case is exceptionally clean and reflective, with terminals marked "batt" and "dist" rather than + and - .

Explained this to Skip , who said he will take it apart and call me with his opinion.

In the meantime I plan to mount the Mac version with "batt" to ground, and leaving the resistor as is.

I'll report my findings.

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