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Gail Rodda
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-- 01-14-2013 @ 3:54 PM
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The 1941 ford cars came out with shields on the sparkplugs does any one know what they look like & have pictures of them? Gail Rodda
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ken ct.
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-- 01-14-2013 @ 4:30 PM
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Ive had 2 41's and neither had anything on the plugs but the wire.?? What are you talking about,what did they do?? ken ct/
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kubes40
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-- 01-14-2013 @ 5:28 PM
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Sure, here you go...
These were actually an accessory first available in 1941. They were made of (brown)Bakelite®. Designed to suppress static to the radio, they were placed over the end of the plug wire near the plug.
I have had a number of sets but am now down to the last set. They are as you know quite scarce.
"Kube"
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supereal
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-- 01-14-2013 @ 8:21 PM
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Similar attachments were sold as "spark intensifiers". They supposedly worked by placing a gap ahead of the plug to "allow a buildup" of spark power. I can remember them being sold at places such as state fairs by hucksters. They rigged a demonstrator car to "show" how they changed performance.
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40 Coupe
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-- 01-15-2013 @ 4:18 AM
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Very nice, interesting item! By the way, I can not find part number 11A-12425, in the green parts book or a 41 chassis parts book.
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kubes40
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-- 01-15-2013 @ 5:23 AM
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I was aware that these are not listed in the parts books. That would help explain why they are so scarce these days.
Parts books as you know, only listed parts that were made available for service.
Not being listed in the 41 book equates no doubt to the fact they were introduced too late for inclusion.
Not being in the green book equates to the fact (most likely) the pieces were not continued.
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TomO
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-- 01-15-2013 @ 8:27 AM
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They are listed in the Jan. 1946 Chassis parts catalog for 41-44 engines. No photo is shown.
Tom
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Gail Rodda
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-- 01-16-2013 @ 8:04 AM
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The things I am talking about were a cover that go over the spark plug under the wire I think they were some kind of fibor. Not the surpressors to help take the noise out of the radio. They were standard equipment. Gail
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deuce_roadster
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-- 01-16-2013 @ 8:56 AM
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What you describe sounds like an aftermarket item like you would get at Western Auto. What leads you to believe they were standard equipment?
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kubes40
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-- 01-17-2013 @ 8:57 AM
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Gail, The '41 Fords utilized the identical plug wires as the '40 Fords. They were color coded with NO shields on the ends.
The only factory "sheild" was the static suppresor I depicted in an earlier post.
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TomO
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-- 01-17-2013 @ 9:01 AM
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Gail is referring to P/N 11A-12425 Cap- Spark Plug. This was not a Western Auto part.
I do not have a photo or a sample of the part.
Gail, if you really need to see what they look like, you can fill out an online request to the Ford Archives and they will provide you with a copy of any engineering document that they have.
http://www.thehenryford.org/research/fordwebsitearchive.aspx
Tom
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deuce_roadster
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-- 01-17-2013 @ 10:17 AM
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TomO, I would think that if these were "standard equipment" on 41s there should have been around 7 million of them (872k * 8 just for the V8s ) and someone would have one to take a picture of. Do they show up in the 41 Chassis Book? Perhaps this is something that was used only on military engines during the war as there were really no 43 or 44 civilian engines. Just a thought.
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kubes40
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-- 01-17-2013 @ 12:19 PM
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Guys, I had previously posted a photo of the shields that Ford started to offer in '41.
They were an "accessory" back then. I am guessing, not a very popular one.
Gail apparantly is under the impression there was someting else at the end of the sparkl plug wires. There was not of course...
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deuce_roadster
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-- 01-17-2013 @ 8:58 PM
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Mike, I did see your excellent photo! I love seeing new parts like that. It seemed like Gail had something completely different in mind. I didn't know if your picture was the same item as TomO's part number but upon closer view I see it is. TomO's reference to 41-44 made me think that perhaps the mystery part Gail asks about might be some military part like a full plug shield to keep water off or something like that. Now that I see the part number in your photo I see it is THE shield. I'm not (and would never) challenging you or TomO knowledge, just trying to figure out what Gail has in mind. How did Gail even know about these things if they are so rare, from the same source as TomO? Thanks to both of you for keeping us all informed! There often seems to be more questions then answers.
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kubes40
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-- 01-18-2013 @ 6:37 AM
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Deuce, I never thought you were challenging anything. In fact, I think you realize I always appreciate your input. You have taught me a few things along the way!
I was not aware the shields were in the 42-44 book. Or, if I was, I had forgotten.
Regardless, I have never seen any other "shield" offered for '41 Fords.
I am of the firm belief, Gail is looking for an after-market part as others have suggested.
And, as just an after thought... it appears Gail is very concerned with "authentic". If that is true, anything but the shields I depicted would be incorrect as they were the only shield offered by Ford in 1941.
I only hope we answered Gail's concern to his satisfaction 
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TomO
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-- 01-18-2013 @ 7:59 AM
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Mike, I missed your photo when I was reading the post. I do remember seeing them on some cars just after WWII. I suspect that most of them were discarded when the plugs were changed.
Deuce, Like Mike, I did not think that you were challenging anything, just that you misread Gail's post.
You may feel free to challenge my knowledge anytime. I try to just comment on things that I know about, but some of my comments could very well be incorrect, because some of them have been incorrect in the past. I appreciate any correction to my posts as it increases the knowledge of everyone that reads this forum.
The caps do not show up in the May 1941 Chassis Parts catalog but do show up in the October 38-42 catalog and the Jan. 1946 catalog. They disappear in the 48 book.
I do not think that they were standard equipment, but might have been supplied on radio equipped cars and not as a separate accessory. This is just a guess on my part, based on the price in the catalog of 2 cents each and the fact that not many have been seen.
Tom
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kubes40
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-- 01-18-2013 @ 8:43 AM
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I thought I might add a bit to this discussion. Please take a look at a copy (I have attached) of a service letter dated Feb. 24, 1942.
These shields were not standard equipment.
I think TomO helps explain why they are scarce these days. I also think the scarcity may have to do with the low cost... there was little incentive for a service man to install them.
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Gail Rodda
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-- 01-18-2013 @ 4:43 PM
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A good friend of mine's father bought a new 1941 ford tudor. He is very knowledgeable about fords. He remembers the covers being on the sparkplugs. They don't have anything to do with the wire. 40 coupe where did you find part number 11A 12425? TomO said they are listed in the Jan 1946 Chassis parts catalog for 41-46 engines. So they must have had them. Gail
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40 Coupe
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-- 01-19-2013 @ 4:38 AM
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Gail: Go back a page to Kubes40 first post he has attached a photo of the parts you question. click on the blue attachment and you can see the parts photo along with the Ford tag with the part number. This is were I got the part number from. As Kubes40 mentioned because the part number does not show up in the 41 parts book or the 1950 book does NOT mean they were not available. TomO says they are in the 46-48 parts book, that would mean they WERE available. Look at Kubes40 attachment of the Ford documentation.
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TomO
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-- 01-19-2013 @ 8:45 AM
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The factory letter seems to imply that the caps were designed to keep moisture from shorting out the spark plugs, not radio noise. That shoots down my guess that they were supplied on radio equipped cars.
Gail, your friends father may be correct in that they came on his car when it was new, but that does not mean that they were standard equipment on all Ford, Mercury and Lincolns. They could have been installed by the dealer as an extra profit item. This was common practice then as it it is now.
I don't have my copies of the Branch Letters any more, but maybe someone has the one that shows the changes made during the year. If you were going to judge a car and deduct points for not having the caps, you would have to have more proof than your friend's father's memory. Because the chassis parts manual shows the caps as being available in 1941, you should not get any points deducted for having them installed.
I hope that this discussion has helped you out. I know that I learned something from it.
Tom
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kubes40
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-- 01-19-2013 @ 9:30 AM
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I do apologize for my initial response (in part) for recalling (incorrectly) these caps as being designed to reduce static. When I came upon that service letter it jarred what little memory I still possess.
I did take one cap out to a '40 I have with the proper (read: two rib H10) spark plugs and installed it.
How that cap kept water, etc. from causing problems is beyond me.
That may be just another reason these didn't sell well.
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Gail Rodda
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-- 01-20-2013 @ 4:39 PM
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Thanks kubea40 for the picture these are the things I am looking for. Would you or any one have 8 of these for sale? Gail
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kubes40
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-- 01-20-2013 @ 5:20 PM
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Gail, I have one set (new old stock) remaining. I'd send you a private message but it appears you do not allow that.
If interested, get hold of me please.
Mike (Kube)
This message was edited by kubes40 on 1-20-13 @ 5:21 PM
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Gail Rodda
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-- 01-21-2013 @ 6:19 AM
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Mike (kube)Please contact me about the spark plug shields you should be able to now. Gail
Gail Rodda
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