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7.4L waterpump question

Discussion in 'Chevy Trucks' started by 70monte, Jan 23, 2011.

  1. 70monte

    70monte Senior Member
    Messages: 468

    The waterpump on my 98 k3500 with the 7.4L has started leaking a little bit. I was doing some research on prices and saw that some waterpumps offered for this engine are reverse rotation.

    Does anyone know what the factory waterpump would be on my truck? This might be a stupid question but how do I know what version I have on there now? I don't want to get the wrong one. Thanks.

  2. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    They are all reverse rotation. The waterpump is driven by the backside of the serp belt, therefore the rotation is opposite the engine.

    Some listings label the reverse rotation, some do not.
  3. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    yep small block and big block chevys if v-belts = reg rotation. serp belt = reverse rotation.
  4. 70monte

    70monte Senior Member
    Messages: 468

    Thank you guys, I learned something new today.