Took the hogs head off and found this old break on the coil. Car runs great, but could this be a problem? Also is there something I could put on that area for insulation?
Found this broken insulation on coil. Runs great! Can this be a problem in the future? Also, is there anything I can cover that area with that will act like insulation?
"Tattle-Tale" sign of attempting to remove the starter motor with the Bendix attached ! Common to find - whether it can cause an issue is open to debate & opinion !
We removed the Bendix first. Evidently someone before me did not.
Jonathan, I found this same situation several years ago on a engine that lay dormant for years. The engine ran well on mag but I decided this would not be a long term situation so.... I discovered that time and what else had turned the insulation brittle to the point that it would esaely "flake" off. After I removed the coil ring I found that the only thing keeping the individual coil bands from shorting was the compression of the coil rings them selves keeping the insulation in place. The pressure of each coil band kept the brittle insulation in place. How long would that last? It was time to replace or "re-coil" Hope this helps. Just my observation. Keep in mind it is free and that's what it's worth. Jerry.
If i could insulate it with something great, if not I think I will just do the transmission linings and put it back together. I don't have the time or money to have it re-coiled.
Another opinion regarding attempting to "patch" the insulation: it's nearly impossible to remove the oil residue after soaking in it for near 100 years. Some folks use Brakleen or solvents to give it a bath then spray or brush on Glyptal to try & coat the "bald spot" ! YMMV !
"Glyptal" is what the insulation was originally coated in. Try and remove as much oil as possible from the damaged area by flowing on a continuous flow of mineral spirits (NOT lacquer thinner). Once the area is clean of oil, the Glyptal should stick to it. Use as much mineral spirits as necessary to get all the oil off. Best to pouring the mineral spirits on instead of using a brush as a brush may dislodge the insulation and you want as much of that to remain as possible to provide protection to the coil. Gently brush on 4 to 6 coats of Glyptal allowing each coat to dry before applying the next coat. Jim Patrick
No, Glyptal was never used by Ford. I think Ford used something akin to shellac or varnish.
Glyptal would work fine on a grease free freshly rewound coil unit. Not so good on an oily old assembly.
The only way is to replace or rebuild your coil loop. Do not take any short cuts here.
Just my opinion.
The only way to safely and permanently fix it is to have the coil re-wound, and if your engine's a fresh rebuild it's the ONLY way, but if this isn't an option for right now, and your car runs well on the mag, examine the area closely and carefully remove any loose insulation. If nothing seems loose, leave it alone. The idea is to preclude any of it coming loose and clogging your oil line. By all means use a transmission screen. The copper appears undamaged in your photo, but the exposed wire means susceptibility to shorts from metallic sediment. It's doubtful that you could get any coating to adhere solidly, which means it's likely to come loose and also endanger your oil line.
Leaving it undisturbed is sort of like discovering a 'possum skeleton in the bottom of your daily-used well. Hasn't caused any trouble yet, so leave it alone; but now you know it's there...
Martynn Vowell took his and Derrick Pang's mag.ring and dabbed on some potting stuff , let it dry and then sprayed on a glyptal varnish.
George n Missourah
What is that?
Martynn Vowell found some brush/dab on form of apart. I'll ask him to chime in.
I had a like situation. Age and weather had turned the insulation brittle. Insulation compression between the coils is what kept the coils apart. In my case the only long term remedy was to re-coil. Jerry.