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C1 fan noise

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  • Matt F.
    Expired
    • June 30, 2002
    • 79
    #1

    C1 fan noise

    I have enjoyed driving my '60 this past summer, with one exception -- fan noise. Even with a clutch installed, it's super-loud and distracting.

    Can anyone offer some pros and cons of using an electric fan?

    thanks
    -Matt
    Tags: None
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    • John H.
      Beyond Control Poster
      • December 1, 1997
      • 16513
      #2
      Re: C1 fan noise

      Electric fans don't come CLOSE to moving as much air as the stock fan/clutch/shroud arrangement, and place a major load on the already-marginal (generator) electrical system that doesn't charge at idle at the worst possible time. Not a good trade-off.
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        • Matt F.
          Expired
          • June 30, 2002
          • 79
          #3
          Re: C1 fan noise

          I stand (very) corrected. I removed the fan, the clutch, and the pulley. The noise persists when the engine runs. I used my dad's old stethoscope trick with a length of PVC, and there's a good "tapping" noise (frequency increasing with RPM increase) coming from behind the timing chain cover (how far behind, I can't tell). I'm thinking this is possibly a bad rod, or bearing, or...? it's down low, I don't think it's valve-related. Something beyond my technical ability to fix, I'm sure.

          Any thoughts?
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            • Jake D.
              Expired
              • August 31, 1984
              • 134
              #4
              Re: C1 fan noise

              Try to listen ON the fuel pump. If the noise gets louder, remove the pump,and see if the return spring has failed. It will make a noise similar to a rod bearing going. I had this problem on an old Monte Carlo. A new fuel pump fixed it.
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                • Jack H.
                  Extremely Frequent Poster
                  • April 1, 1990
                  • 9906
                  #5
                  Re: C1 fan noise

                  The 'tapping' or 'knocking' noise could well be a WARNING... If the cam/crank gears are worn OR the timing chain has been stretched, the noise may well be loose chain randomly 'waiving' and hitting against the inside of the timing cover...

                  If this IS the case, you're playing with fire! Given too much slack, the timing chain will jump over the gear teeth, you'll lose registration and valves can hit pistons, break and 'grenade' your engine! Get the situation addressed by a competent mechanic now...
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                    • Bert L.
                      Very Frequent User
                      • April 30, 1977
                      • 424
                      #6
                      Re: C1 fan noise

                      Timing chain strong candidate for noise. Park it and investigate!......
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                        • Jake D.
                          Expired
                          • August 31, 1984
                          • 134
                          #7
                          Re: C1 fan noise

                          Hey Matt-- What was the outcome? Did you find out what the noise was?
                          Let us know what you find.
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