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Subject: 8N Side Mount Distributor Cap Woes

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Jerry    Posted 06-28-2018 at 12:05:04 [URL] [DELETE]        [Reply] [Email]  
  • 8N Side Mount Distributor Cap Woes
  • I have a problem with my side mount distributor. I had some Ignition problems crop up, I was driving and it stopped, no spark. Decided to replace everything ignition wise as I was unsure of what had been done to it in the past. I replaced,; Plugs, wires, distributor cap, rotor, condensor. coil and all the wiring. Turned it over and nothing. I took the distributor cap off and the rotor fell out in 3 pieces. I had mail ordered the tune up kit and thought maybe I got the wrong distributor cap by mistake so I went to tractor supply and bought another rotor and cap. Put it on and same exact thing. So I bought another rotor and put the old cap back on, it works fine. That cap is not going to last forever. What do I do?

    mhb@ufe    Posted 06-28-2018 at 17:31:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • We've had a lot of trouble with replacement rotors fitting very tight on the distributor shaft. It will feel like it is on but not going down far enough unless you force it down.

    Mark

    Bruce (VA)    Posted 06-28-2018 at 13:13:48 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • " I went to tractor supply and bought another rotor and cap."

    Stop buying tractor parts at TSC.


    Try Just8N's Dennis Carpenter or even NAPA.

    And if you have a dust cap, remove it as Jesse suggested.

    I've also had a problem w/ new cap gaskets.

    Jerry    Posted 06-28-2018 at 13:16:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • I ordered them first from DB Electrical.

    JMOR    Posted 06-28-2018 at 12:27:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • Do you have the dust shield in place? It raises the cap by about 0.1 inch.

    Jerry    Posted 06-28-2018 at 13:15:35 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • Yes, the dust shield was and is in place. The cap goes on very tight.

    K.LaRue-VA    Posted 06-29-2018 at 15:01:49 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • If you have the correct original dust cover, it fits down inside the distributor body, and the distributor cap fits exactly as it does without the dust cover in place. The correct dust cover causes no problems.

    If you buy any replacement dust cover, regardless of what it may say it fits, the replacement dust cover will be for the NAA distributor. The replacement type jacks the 8N side mount distributor cap up and it no longer engages the slot in the distributor that prevents rotation. With the aftermarket dust cover, the only thing preventing distributor cap rotation is the spring clamps. You are better off without a dust cover than using a replacement that does not fit right.

    JMOR    Posted 06-29-2018 at 15:22:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • Most (or all) of what you say may be 100%, but here is what was on my 8N in 1968 (and since) and it does raise the cap by 0.097 inch, part of it fits down in distributor (except 0.097 lip, both dust shield and cap are keyed such as to prevent rotation. The additional height causes no problems as the posts inside are machined such that rotor will be just fine at varying heights within reason.

    K.LaRue-VA    Posted 06-30-2018 at 09:15:03 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Side Mount Distributor Cap Woes

  • The one on the right is what came out of a 1951 and a 1952 distributor. The one on the left was sold recently as a late 8N side distributor replacement dust cover. The replacement does not allow the distributor cap to engage the slot in the distributor body that prevents rotation.

    I'm wondering if your dust cover was an in-between version that would work correctly with the 8N distributor. The modern ones appear to rely only on the spring clamps to keep the cap from turning. They also make it darn near impossible to latch those clamps.

    K.LaRue-VA    Posted 06-30-2018 at 09:22:44 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • Since both of my dust covers were cracked, and the available replacements did not work right, I used the best one I had to make a mold, and made my own. Mine are polyurethane where the originals appear to be a more brittle bakelite.

    JMOR    Posted 06-30-2018 at 10:56:15 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Side Mount Distributor Cap Woes
  • Very nice!

    Since tractor was already 18 when acquired, who knows what PO may have changed.

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