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Water Pump Bolts

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  • Ray C.
    Extremely Frequent Poster
    • June 30, 2001
    • 1132

    Water Pump Bolts

    I would like to confirm the correct length; head markings and grade for the water pump-motor mount blots for a 1961 Corvette?

    Thanks for any help!
    Ray36314
    Ray Carney
    1961 Sateen Silver 270-HP
    1961 Fawn Beige 315-HP
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: Water Pump Bolts

    Ray-----

    Upper and lower left side (driver's side)= 3/8-16 X 1-7/8"

    Lower right side= 3/8-16 X 2-11/16"

    Upper right side= stud of GM #3750563 3/8-16 both ends and 3-29/32" overall length. This stud is discontinued but available in reproduction.

    The above-referenced bolts were all of SAE Grade 5 (3 radial lines on head). Headmarks included "A" in a circle and "TR". There may have been others, too.
    In Appreciation of John Hinckley

    Comment

    • Ray C.
      Extremely Frequent Poster
      • June 30, 2001
      • 1132

      #3
      Re: Water Pump Bolts

      As always Joe; Thanks for your help!
      Ray
      Ray Carney
      1961 Sateen Silver 270-HP
      1961 Fawn Beige 315-HP

      Comment

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