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10-13-2012, 05:27 PM | #21 | |
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Re: crab dist parts Q...
Quote:
Actually the brown paint is a "dielectric" and is used in lots of old distributors by many companies. Helped prevent spark arch over and carbon tracking... |
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10-14-2012, 02:19 AM | #22 | |
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Re: crab dist parts Q...
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So, am I doing the ok thing when I use 'dielectric' grease on all of my electrical contacts, i.e.- rotor end; cap contacts, wire ends; etc ? |
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10-14-2012, 04:57 PM | #23 |
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Re: crab dist parts Q...
just got back
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10-14-2012, 08:11 PM | #24 | |
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Re: crab dist parts Q...
Quote:
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10-14-2012, 08:26 PM | #25 |
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Re: crab dist parts Q...
I am having the same problem, breaking rotors, or cracking them. I see somebody said file off .020 and another says .125. That is quite a difference. Will it still jump spark at .125? Not knockin it, just like to know how much is too much.
Thanks, Lee |
10-15-2012, 02:14 AM | #26 |
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Re: crab dist parts Q...
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Iron....Interesting and pics to share, never seen one! Does the iron dist have any advantages over the aluminum dist ? |
10-15-2012, 03:06 AM | #27 |
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Re: crab dist parts Q...
Ive had a dozen of them over the yrs and they rebuild well,accuately more resistent to nicks and burrs around the edges where the cap fits which have to be filed off on alum ones.Would rather work on those than alum ones. ken ct.
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10-15-2012, 01:55 PM | #28 | |
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Re: crab dist parts Q...
I wouldn't use dielectric on any high voltage eg inside the distributor .I would go along with sometimes using the old parts polish up the points on .
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10-15-2012, 05:39 PM | #29 |
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Re: crab dist parts Q...
I took off the distributor, put a thin layer of clay on the lower contacts of the cap. Rotated the cam by hand and felt some resistance, other than points functioning. When I removed the cap, I found the rotor was hitting #4 and #8 contacts on the cap. I removed about .020 from the end of the rotor, and no more interference.
Going to replace cap and rotor, but will repeat process before firing up the engine again. Also, I did not have the gasket for the cap. |
10-15-2012, 06:00 PM | #30 |
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Re: crab dist parts Q...
Iron crabs were I believe Canadian, and lots of Canadian military parts reached Carpenter and others from WWII Indian army stocks.
The innards seldom need replacement, just careful cleaning and lubing. Coupla things...be sure to slide the cam off of shaft, clean and lube where it pivots. This area MUST move, and it is oft stuck with petrified grease. The front bearing is lubed through hollow felt filled shaft from rear bearing area...after you have cleaned the shaft that area will be full of murky solvent and it will be a long time before it cooks and oozes out to be replaced by oil. I simply put mine on top of the exhaust from house water heater until solvent has evaporated through the itty bitty holes. (the various cap gaskets in the Ford schematic generally cannot be used with non-original caps) |
10-15-2012, 06:19 PM | #31 |
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Re: crab dist parts Q...
Bruce ,
The front bearing is lubed through hollow felt filled shaft from rear bearing area...after you have cleaned the shaft that area will be full of murky solvent and it will be a long time before it cooks and oozes out to be replaced by oil. We actually remove the felt and clean and relube it....a real pain but we feel its worth it... |
10-15-2012, 06:21 PM | #32 | |
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Re: crab dist parts Q...
Quote:
It should jump the .030 with no problems at all....... |
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10-15-2012, 06:23 PM | #33 |
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Re: crab dist parts Q...
Yes dielectric should be used at every connection as well as spraying WD40 on the cap and wires to help water/moisture proof the system...inside the distributor as well as outside....
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10-15-2012, 06:30 PM | #34 |
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Re: crab dist parts Q...
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10-15-2012, 06:50 PM | #35 |
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Re: crab dist parts Q...
Bubba rebuilt 2 for my 37 and they look great. One of these days I'll get to start the damn thing too.
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10-18-2012, 12:57 PM | #36 | |
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Re: crab dist parts Q...
Quote:
I just looked at mine again after 100 miles and decided to take another .005 off the rotor. I could still see slight contact on the cap terminals. Started by taking .020 and now another .005. I also found a NOS mallory crab cap for the Ford dist. and it fits a lot better than the ones available now... |
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10-19-2012, 12:51 AM | #37 | |
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Re: crab dist parts Q...
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Thanks much for sharing your vast knowledge/experience regarding distributors and their use in our hobby! You have validated my use of dielectric grease and belief in its benefits. I've used it for any and all electrical connection work that I do. I've never experienced any of the oxidizing and blackening of electric contacts/connections that you normally see in those after prolonged use. I also have increased auto and house bulb life with its use. I understand WD40 and will take your advice that way also. Hey, you may not know it but that wd40 is also excellent sprayed on fish lures/bait as attractant too,eh |
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10-19-2012, 03:39 AM | #38 |
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Re: crab dist parts Q...
Re the .020/.025" clearancing, can you say exactly which rotor and cap? Are these the Napa Echlin parts?
Mart. |
10-19-2012, 07:07 AM | #39 |
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Re: crab dist parts Q...
Hey, you may not know it but that wd40 is also excellent sprayed on fish lures/bait as attractant too,eh[/QUOTE]
Really? I'll have to try that. Anything I can do to hook up with some big ones I'll try. |
10-19-2012, 08:27 AM | #40 |
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Re: crab dist parts Q...
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