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  • Earl Cap

    Which is correct? Was there changes during production. Chrome or painted? What you say?

  • #2
    Pretty sure they were plated in bright zinc.
    R3
    Jim Herter Copperas Cove, TX
    Original Owner ֍ 1970 TR6 ֎ CC 50990 LO
    VDU 506H

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    • #3
      Thanks Jim. So that is bright zinc and not chrome? Thanks

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      • #4
        Hard to say with certainty what yours is, but it looks like it might be chrome. I'm sure there have been some caps replated in chrome, but I think the problem in doing so is degreasing the cap sufficiently to not mess up the plating bath.

        I think some other Marques had the same cap done in chrome. In fact, I bought a chrome cap just as the original cap but missing the "OC-4" marking.

        My original cap is zinc plated. It will mostly clean up, but it has a couple of stains that just won't come out. If I could find the rivet holding the rubber washer, I would properly degrease it and replate it in bright zinc.
        Last edited by RatRidgeRoadster; 09-08-2019, 09:45 PM.
        R3
        Jim Herter Copperas Cove, TX
        Original Owner ֍ 1970 TR6 ֎ CC 50990 LO
        VDU 506H

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        • #5
          Some were certainly done in chrome as mine have a brass rivet in the center. Only one of my chrome ones has the AC or OC4 on the ears though its rivet is chrome too.

          I'm thinking zinc for the '250 and early 6 but jury's out on the later ones with painted v/c.

          Can't beat the look of chrome, and TRs will be worth a lot more than they are now by the time you'll lose points at a concourse for a chrome one.

          Tom
          Last edited by ima68tr; 09-09-2019, 02:29 PM.

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          • #6
            Chrome looks cooler regardless (imho)
            So much rust, so little time

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            • #7
              FWIW, the cap on my '69 is definitely chrome, but i can only guess if it's original or not.
              Bill Connell
              1969 TR6 CC28790
              TR6 project log
              St. Paul MN

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              • #8
                Boy trying to scare up a quart of Duckhams is pretty tough these days....
                1974 TR-6 Logic Overdrive

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                • #9
                  Cad plated was original but you could get a chrome cap also, so either would be correct.

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                  • #10
                    No votes for painted, then.

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                    • #11
                      Well I would have thought chrome cap with a chrome rocker cover, and cad plated for a painted cover.

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                      • #12
                        Someone did have a NOS bright chrome cap on ePay recently, in the box and claimed it was for TR6 but who knows. I can't recall if it was Lucas or Stanpart, but definitely not from some aftermarket supplier. I doubt Triumph would have put a chrome cap on a factory painted valve cover.

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                        • #13
                          Originally posted by ima68tr View Post
                          No votes for painted, then.
                          no, painted were just attempts at cleaning up the cad plated ones.

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