This doesn't sound good... - NCRS Discussion Boards

This doesn't sound good...

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  • Gary H.
    Expired
    • May 31, 2004
    • 48

    This doesn't sound good...

    My '64 365 HP is making a kind of "scraping" noise. Sounds like it's coming from the water pump area. It goes away once it's good and warmed up. Bad water pump? Thanks - Gary
  • Ken A.
    Very Frequent User
    • July 31, 1986
    • 929

    #2
    Re: This doesn't sound good...

    Disconnect the fan belt & see if it goes away or use a "stethoscope" to hear where it's coming from.

    Comment

    • Tom H.
      Extremely Frequent Poster
      • December 1, 1993
      • 3440

      #3
      Re: This doesn't sound good...

      Have you recently replaced any parts that you could point the finger at ?? Alternator possibly ??

      Fan hitting the shroud ??

      Hopefully something simple, let us know.
      Tom Hendricks
      Proud Member NCRS #23758
      NCM Founding Member # 1143
      Corvette Department Manager and
      Specialist for 27 years at BUDS Chevrolet.

      Comment

      • John W.
        Infrequent User
        • April 1, 1993
        • 1

        #4
        Re: This doesn't sound good...

        If you have done anything with the starter motor, check to make sure the bellhousing front inspection cover is correctly secured. It's a big piece of sheet metal that can (and has on my 365) bend a bit and scrape the flywheel. An easy fix.

        Comment

        • Joe R.
          Extremely Frequent Poster
          • March 1, 2002
          • 1356

          #5
          Re: This doesn't sound good...

          Look closely to see if the back edge of the water pump pulley is hitting the water pump casting. This clearance is usually very small, and most rebuilt water pumps have the pulley flange set farther back than what I believe your car was supposed to have. Usually it doesn't cause a problem, but if it was very close to start with and something moved even slightly, it might start to scrape.

          Comment

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