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Timing gear whine

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  • #16
    Originally posted by DEEPNHOCK View Post
    Interesting comment.
    I wonder what the engineering reason was for casting the gear around a steel ring.
    Could it be for dimensional stability?
    Or could it be to change the mass to change the harmonic's?
    Adding steel could change the vibration 'range' where the gear could vibrate/oscillate and 'ring'.
    (which could sound like a whine with the gear contact changing).
    Those I've seen have the groove machined and the steel ring snapped into place afterward.

    jack vines
    PackardV8

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    • #17
      Originally posted by PackardV8 View Post
      Those I've seen have the groove machined and the steel ring snapped into place afterward.

      jack vines
      That would make sense. Haven't looked at an OE one since the 70's...
      But the same questions about harmonic's apply.
      HTIH (Hope The Info Helps)

      Jeff


      Get your facts first, and then you can distort them as much as you please. Mark Twain



      Note: SDC# 070190 (and earlier...)

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      • #18
        StudeRich Not trying to be a smart butt here but although I do like chevy's also I was talking from experience of managing a engine rebuild shop for almost 10 years. Average engine production was 2-3 per day and we where a small shop. A lot where 6 cyl's with gear drive cams.

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