N Board Forum - Expanded Thread Page

Subject: Rebuilding Front Mount Distributor 8N - Point Sets

[Back] [Return to Top of Forum]

Kimberly    Posted 08-29-2021 at 11:23:28 [URL] [DELETE]        [Reply] [Email]  
  • Rebuilding Front Mount Distributor 8N - Point Sets
  • I am in the process of rebuilding my front mount 8N distributor. I ordered new bushings from Just 8Ns and have installed them. I have tried two different point sets; from two different vendors, of the Blue Streak points. The points were ordered from fleabay. The problem I am seeing with the Blue Streak points is that with the points fully closed they are showing open when testing with my digital ohmmeter. I sent the first set back and ordered another set and after installing the points, they tested open as well even when fully closed. With the second set I used a high power lens to examine the points and I could see a gap; the point faces were not properly aligned. I thought that maybe it was the breaker plate so I installed the old points back in the distributor and tested with my ohmmeter with the result that the meter showed the points making contact.

    Has the quality of the Blue Streak points fallen to where they are now junk? Or is it that perhaps the points on fleabay are counterfeit and not really Blue Steak? Both sets of points came in a red box with STANDARD at the top with BLUE STREAK beneath with the blue S.

    Has anyone else seen any issues with Blue Streak points? I read a post that Tim Daley made in 2020 stating that the Echlin points are now junk. Has the same happened with Blue Streak? Tim mentioned CNH points but there are no longer any CNH dealers in my area and searching the net turned up nothing. If Blue Streak and Echlin are now out as the points to use, what is the recommendation for points?

    Steve Dabrowsku    Posted 09-04-2021 at 15:07:12 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • I just installed a set of Echlin C-35 points with no problem, aligned pretty well, had to tweak a small amount to get alignment perfect, but they make good contact and fit fine. Not sure what the issue is that Tim has mentioned.

    Ozlander    Posted 08-30-2021 at 17:15:44 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • Put the old points back in and forget about it.
    Why change?

    JMOR    Posted 08-29-2021 at 16:11:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • When you say, "closed but not making contact". is there a space/clearance between the points rubbing block and the cam?

    Kimberly    Posted 08-29-2021 at 21:17:33 [URL] [DELETE]        [Reply] [Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • This is with the breaker plate out of the distributor; no cam to hold the points open. The points appear to close but with a high power lens you can see the gap in the point and the fact the faces of the contact surfaces are not aligned. Ohmmeter shows the points are open. The old point set with the ohmmeter show zero ohms, closed, contact. The new points, ohmmeter shows OL. Two different sets of Blue Streak have the same; open contacts even when closed.

    Bruce (VA)    Posted 08-29-2021 at 16:09:24 [URL] [DELETE]        [Reply] [Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • This is from a YT post of 3 years ago:

    The cold weekend gave me the time to try and find out why folks are having problems getting new points to open to the required gap of .015. With a lot of help from JMOR, I?m sorry to report that neither one of us can definitively say what the cause is. But, I think we can say with some degree of certainty what is NOT causing the problem.

    Please note that both JMOR and I are operating at a distinct handicap of never having personally experienced the problem of not being able to get a new set of points to open to .015.

    Our conclusion as of today: it?s not likely the points. It?s the sum total of worn parts in the distributor.

    So, please prove us wrong! If you can not get a set of new points to open to .015, pull the distributor apart and start measuring. And then share w/ us what you find.

    Now for the detail.

    I used new in the box Airtex, NAPA and Bluestreak points. I stacked them one on top of the other on a 3/16? drill bit to replicate the .185 pivot post. There was no discernable, visible difference in the three sets of points.

    I could not replicate JMOR?s measurement of the wear block dimensions. Measuring the thickness of the wear block doesn?t tell us anything as JMOR has already noted. The wear block dimension that counts is the distance from the center of the pivot pin to the leading edge of the block. JMOR estimated that at .075 on his set of NAPA points. (below)

    From my measurements, I got the Airtex points open to .035, the NAPA points to .026 and the Bluestreaks to slightly more then .035 (biggest feeler gauge blade I have is .035) .

    I can offer no explanation for the smaller gap w/ the NAPA points. It must be the adjusting slot in the points base which is measurably different than the Airtex and Bluestreak points. But, I can?t see the difference between .319/.321 and .313 on the NAPA points as accounting for the difference between a max gap of .035 and .026.

    My conclusions, based upon some guess work: the critical measurements in the distributor start with the adjusting screw and its free travel. I got a measurement of .244 on the head of the screw and free travel of .032. (I lifted the plate up and measured the distance between the top bushing tower and the screw). Those measurements, plus wear on the cam lobes, bushings and shaft could easily, in my opinion, result in enough slop in the distributor to not allow a gap of .015.

    Lastly, as Jock (OR) suggested, I checked the vintage V-8 Ford board (Ford Barn) That's because the dual point Ford V-8 distributor from 1936 to 1948 uses the same design points as does our frontmount. One of the 2 sets is in fact identical to our CS35. While they complain about points quality, no one reported a gap issue. And one regular on that board rebuilds old V-8 Ford distributors and says the NAPA points are the best on the market. Others buy NOS points off of eBay.

    https://forums.yesterdaystractors.com/viewtopic.php?t=1339956&postdays=0&postorder=asc&highlight=echlin+points&start=30

    Kimberly    Posted 08-29-2021 at 21:25:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • This is not a matter of setting the points gap. This is a matter of a new set; no, two new sets, of Blue Streak points showing open when the point set is fully closed; points contact surfaces supposedly touching each other. Also, the point faces are not properly aligned as seen under a high power lens. So, Tim has indicated in another post that Echlin are now crap. I am now saying that Blue Streak are crap. I say this because I am not seeing an issue with the old points (which I could use but want to put in a new set). So, is TISCO now the points to use even with the plastic rubbing block? If I could get my hands on a NOS Blue Streak set, I would try them. I am told that Blue Streak is now manufactured in China and everyone knows how great the Chinese quality control is or not.

    JMOR    Posted 08-30-2021 at 09:29:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • It is not uncommon! Points may be packaged with anti-corrosion coating (may act as sorry insulator) that can easily be cleaned by dragging a strip of coarse paper (grocery bag) thru them. Aligning for parallel faces is no big deal, using pliers. If simply installed and fired up, just normal voltage/current will usually 'punch thru' the film/coating, whereas the micro-amperes of your ohmmeter will not.

    Kimberly    Posted 08-30-2021 at 15:12:31 [URL] [DELETE]        [Reply] [Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • Thanks for the information, I did not know that. So are Blue Streak still a good brand to use? What do you recommend?

    JMOR    Posted 08-30-2021 at 16:38:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Rebuilding Front Mount Distributor 8N - Point Sets
  • I use the same points for probably 10-20 years, so I am not the guy to recommend a brand. I think Bruce keeps up on that

    [Back] [Return to Top of Forum]


    Top