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Thread: Plating on calipers

  1. 10-05-2015, 08:11 AM #1
    Slcarr
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    Plating on calipers

    What was the plating on early calipers (65-73). Weren't they actually clear (silver) zink? Thanks.
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  2. 10-05-2015, 08:51 AM #2
    freezing14
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    as far as I know , they were all yellow zinc

    they are easy to plate , and make yellow , its the degreasing before that is a B

    the only way I manage to clean mine enough was top bake them in the BBQ for 40 minutes
    now on the road 914-6
    now in the shop for concourse resto 11850275 S SWT
    daily driver B8 S4 stage 2
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  3. 10-05-2015, 11:26 AM #3
    Slcarr
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    Does yellow zink fade to a silver color?
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  4. 10-05-2015, 11:28 AM #4
    Barwaut
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    Yes..........
    Slate Gray, Red Leather, 1968 912 HWT
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  5. 10-05-2015, 12:14 PM #5
    Jim Breazeale
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    Quote Originally Posted by Slcarr View Post
    What was the plating on early calipers (65-73). Weren't they actually clear (silver) zink? Thanks.
    They were yellow zink.

    Regards

    Jim
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  6. 10-05-2015, 04:22 PM #6
    Slcarr
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    Thank you for clearing that up. I have many 73 and earlier 911/912 calipers that have never been touched and if there is not surface rust they have silver plating. Thanks Jim, I certainaly respect your input. Steve Lindholm
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  7. 10-05-2015, 04:48 PM #7
    Jim Breazeale
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    Quote Originally Posted by Slcarr View Post
    Thank you for clearing that up. I have many 73 and earlier 911/912 calipers that have never been touched and if there is not surface rust they have silver plating. Thanks Jim, I certainaly respect your input. Steve Lindholm

    No, they have yellow zinc plating. Take one of them apart and look at the plating between the caliper halves that have not been exposed to the elements. It will be yellow zinc.

    Regards

    Jim
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  8. 10-05-2015, 05:16 PM #8
    Larmo63
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    Send them off to PMB for full plating and restoration.

    (no affiliation, he did my brakes and I LOVE them)
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  9. 10-05-2015, 07:03 PM #9
    Richy
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    I've probably had 8 calipers analyzed with a spectrophotometer , ranging from '65 to '73 , they were all cadmium plated with a yellow chromate . Coincidence ? I don't think so . I don't get it . People want to cad plate nuts and bolts that were originally zinc and zinc plate calipers that were originally cad .
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  10. 10-06-2015, 06:32 AM #10
    doigthom
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    +1 on PMB as to quality. They did mine.
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