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About Dave39MD

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    Junior Member
  • Birthday 09/01/1955

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    Lawrenceville, GA

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  1. AC K10 spark plug --- modern equivalent

    Prestolite 14 7 crosses to AC 45. I would ask the men who own them what they are using, is there a Packard forum? On the wide gap the side electrode is longer and more able to withstand a wide gap. They started being used a lot when HEI (high energy ignition) came out. Dave
  2. AC K10 spark plug --- modern equivalent

    In an old car AC catalog they show the plug 46 for 31-36 Packard's with 14mm plugs. 46 was a non resistor and discontinued many years ago, replaced by R46 which is a resistor plug that helps with radio interference. R46 is not available either but can be found on ebay once in awhile. The currently available plug is R45, slightly cooler than the R46. X stands for special or wide gap. Dave
  3. 1931 Buick...Is it Safety Glass or Plate

    It may be the way I am conducting the test or I do not understand how it is supposed to look , but I don't trust the nickel double image test. Every piece of glass I test shows two images. Plate glass from a 31 Cabriolet, the 31 Buick, the 39 Chevy, and even my 2006, 2500 with tempered glass. Any thoughts on how to determine plate vs. safety other than breaking it? There are no imperfections. The glass in the Buick measures .210, the safety plate in the 39 Chevy measures .280. Thanks for your ideas Dave
  4. What's your thought ?

    Good luck and I know you know not to get the starter to hot by cranking away. I really like the idea(s) of getting the fuel up to the pump with the vacuum pump. Dave
  5. What's your thought ?

    When starting my 31 Chevy for the first time with everything dry it took forever to get fuel to the pump and carb. Nothing was wrong it just took way longer than I ever expected. Dave
  6. I don't know if it's art. But I like it.

    Very nice truck. On the temp gauge there is someone who specializes in their repair but the name is not coming to me. I would try searching on this site. There also a video out there about doing it yourself. Dave

    Larry, ACDelco was around long before Delphi. It started as United Motors Service Corp in 1916 and in the 1960's became United Delco. AC wanted to go their own way and did for a period of time then in 1974 AC and Delco merged their sales forces and warehousing. They celebrated their 100 year anniversary last year. I guess we are getting away from the op's question. Dave
  8. 1931 Buick...Is it Safety Glass or Plate

    Thanks for the replies. If I figure it out I will let you know. Any other thoughts are welcome. Dave
  9. 1931 Buick...Is it Safety Glass or Plate

    Thanks for the reply. I suppose my question or point of concern is that there is no visible lamination on the edge of the glass but when you use the nickel test I see two reflections. I suppose it could be carefully finished old safety glass with some type of edge treatment that hides the laminations? Anybody have any ideas, is the nickel test definitive? Thanks Dave
  10. 1931 Buick...Is it Safety Glass or Plate

    Like midman I have a 1931 Buick. The glass passes the nickel test as being safety but also like midman there is no lamination line like on the safety plate in my 39. Does anyone have an idea on why there is no lamination line ? I just want to be sure it is safety glass as there are no markings on the glass. The car has never been restored but that doesn't mean the glass wasn't swapped out. Thanks Dave The Buick glass measures about 1/16 less in thickness than the 39 Chevy safety plate, about .210.

    No, that is not what we have been saying. The currently available AC spark plug is R45 and is available at Bob's and many of your local parts sources. R46 will have to be sourced from members as offered above or ebay type sources. R46 is a good plug, just not as easy to acquire as R45. Dave
  12. Copper fuel line on vintage car

    You don't say what car you have but many early cars had brass rather than copper. Copper will work harden and may break. NAPA sells bulk fuel line in different sizes you may consider that. What size is the tube, OD? Dave

    Checking an old Champion catalog the cross for AC 46 is Champion # J11C. There is danger in using cross reference info for application. Hope this helps. Dave

    I am using factory (AC) books. Let me check the cross in a few more but again I would use the AC plugs recommended.

    I am not sure about the cross, my AC book shows RJ12C crossing to C49. C49 would be beyond the heat range recommended by the manufacturer. What exactly on the plug is 3X times longer? Hot plugs, like a 49, have been know to melt holes in pistons. I have more books and will check further but I would use what the manufacturer recommended. Dave