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  • 2 Post By The Ape Man
500, 472, 425, 368 Discussion, Pulleys in Cadillac Engine Technical Discussion; Hey Guys the crank pulley on my 472 is a chunk of iron, what effect would changing to the 425 ...
  1. #1
    oldeman is offline Cadillac Owners Member
    Automobile(s): 1979 sedan deville
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    Pulleys

    Hey Guys the crank pulley on my 472 is a chunk of iron, what effect would changing to the 425 pulley system have on the 472? big difference in weight, is that heavy 472 crank pulley considered a balancer or something,?if so how does one make up for it with the 425 pulleys. Must say imma bit confused, HELP. Thanks

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  3. #2
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
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    Re: Pulleys

    I know that some folks swap the other pulleys out when removing air pumps & converting to HEI distributors etc, but don't remember anything about changing the big crank pulley, which I would think is the balancer. I have the big iron pulley on my 508/El Camino project, and I'm not inclined to change it.

  4. #3
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
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    Re: Pulleys

    I've swapped these pulleys around for a long time without any problems.

    The older pulleys were heavy to damp any last trace of any vibration.

    They used to put weights in interesting places on old Cadillacs too. One on the rear axle tube and one near the crapolytic converter.
    Benzilla and Benzilla like this.

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