Spark plug wires with integral ground straps?? - NCRS Discussion Boards

Spark plug wires with integral ground straps??

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Keith M.
    Very Frequent User
    • January 17, 2021
    • 663
    #1

    Spark plug wires with integral ground straps??

    Just stumbled on something never knew about. page 440 of the 1969 AIM shows as part of radio shielding...spark plug wires that have integral ground straps that come out of the wire housing near valve covers to attach to valve cover bolts. Never heard of such a thing. Was that really how they came from the factory. Haven't explicitly looked for said wires but are they still out there today?

    NVM...just saw them in Paragon catalog. Was planning to get new dated wires from Lectric. Presume they are the same. But would the ground be effective given aluminum valve covers??

    And now I look closer and it is BB only...non issue for my L46
    ***************
    late Oct 1969 L46 350/350, M21 4spd, 3.70 posi convertible --As with life, restoration is a journey, not a destination. Though restored cars provide both journeys AND destinations!
    Tags: None
      • Top
    • Leif A.
      Extremely Frequent Poster
      • August 31, 1997
      • 3607
      #2
      Re: Spark plug wires with integral ground straps??

      Keith,
      I believe the "ground wire" that you're seeing in the AIM U69, A09 is the shielding ground on the big block spark plug wires. I haven't had my first cup of coffee yet but take a closer look.
      Attached Files
      Leif
      '67 Coupe L79, M21, C60, N14, N40, J50, A31, U69, A01, QB1
      Top Flight 2017 Lone Star Regional
        • Top

        Comment

        • Keith M.
          Very Frequent User
          • January 17, 2021
          • 663
          #3
          Re: Spark plug wires with integral ground straps??

          Leif
          Am on east coast..so second cup of coffee got me to answer my own question..see above. Thx
          ***************
          late Oct 1969 L46 350/350, M21 4spd, 3.70 posi convertible --As with life, restoration is a journey, not a destination. Though restored cars provide both journeys AND destinations!
            • Top

            Comment

            • Owen L.
              Very Frequent User
              • September 30, 1991
              • 838
              #4
              Re: Spark plug wires with integral ground straps??

              Originally posted by Keith Michaud (67636)
              And now I look closer and it is BB only...non issue for my L46
              Yes, these are big block only items. Small blocks used common routing of the wires down the back of the block and under the exhaust manifolds. All of the wires were then covered with the hard metal shielding to keep the radio interference to a minimum. The big blocks couldn't run the wires that way because of the shape of the exhaust manifolds (and maybe other reasons) so the wires run over the top of the engine to the plugs. Hard housing shields would have been pretty difficult to create a good design, so each wire has its own braided shield that's grounded at each end.
                • Top

                Comment

                • Mark E.
                  Extremely Frequent Poster
                  • April 1, 1993
                  • 4498
                  #5
                  Re: Spark plug wires with integral ground straps??

                  Are these cables considered grounded or bonded like the radio antenna mount and exhaust pipes?
                  Mark Edmondson
                  Dallas, Texas
                  Texas Chapter
                  1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
                  1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top
                    • Top

                    Comment

                    • Owen L.
                      Very Frequent User
                      • September 30, 1991
                      • 838
                      #6
                      Re: Spark plug wires with integral ground straps??

                      I guess by definition, they are bonded as carrying current isn't their intention. Each end is connected to the block – at the valve cover bolts and at the wire brackets by the distributor.
                        • Top

                        Comment

                        • Tom D.
                          Extremely Frequent Poster
                          • September 30, 1981
                          • 2126
                          #7
                          Re: Spark plug wires with integral ground straps??

                          GM number for "shielded spark plug wires" ?
                          8912284 group number 2.239 from service parts div. Might be different from originals.
                          https://MichiganNCRS.org
                          Michigan Chapter
                          Tom Dingman
                            • Top

                            Comment

                            Previous template Next
                            Working...

                            Debug Information

                            Searching...Please wait.
                            An unexpected error was returned: 'Your submission could not be processed because you have logged in since the previous page was loaded.

                            Please push the back button and reload the previous window.'
                            An unexpected error was returned: 'Your submission could not be processed because the token has expired.

                            Please push the back button and reload the previous window.'
                            An internal error has occurred and the module cannot be displayed.
                            There are no results that meet this criteria.
                            Search Result for "|||"