Harmonic Balancer. Dangerous?

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Northstar Engines and System Technical Discussion Discussion, Harmonic Balancer. Dangerous? in Cadillac Engine Discussion; I just mentioned this on another thread, but I wondered what the experts think of this. "The harmonic pulley on ...
  1. #1
    Rob Benham is offline Cadillac Owners Fanatic
    Automobile(s): 95 FWB
    Join Date
    Sep 2004

    Harmonic Balancer. Dangerous?

    I just mentioned this on another thread, but I wondered what the experts think of this.

    "The harmonic pulley on the crank became delaminated as well. That would've been tedious on a long run, so look at the strip of rubber between the inner and outer castings and make sure that the outer [grooved] part is running true. If its wobbling, change it, $67 after market. Take care, I got a Doorman part and the hole in the middle was too big by .5mm This is really dangerous in my opinion. They have not answered my e-mail on the subject yet."

    Half a mil does not sound much, but the pulley, far from needing a tool to put on, was so lose that you could rock the outer edge 1/4" or so. This meant that not only were the bolts doing the work, but that it was unlikely that the pulley would be centered.

    The part was a Doorman Harmonic Balancer 594-017.

    The old one took a puller to get off. The next part was a Pioneer, and even that wasn't tight, but didn't rock. There was some mention of GM changing cranks in the middle of a production run sometimes!! Can this be true. Mine is the 5.7 1995 FWB If this were true, it could mean that Doorman has the specs for a different engine/crank, but that wouldn't account for the Pioneer's different fit.

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  3. #2
    eldorado1 is offline Cadillac Owners Connoisseur
    Join Date
    Feb 2004

    Re: Harmonic Balancer. Dangerous?

    Well this is the northstar forum, but that does sound dangerous. Maybe you just got a misboxed part... I've had that happen a few times.

  4. #3
    MonzaRacer is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Dec 2006

    Re: Harmonic Balancer. Dangerous?

    If you are working on a LT engine give ATI a call they have superdmapers that are the best in the buisness.
    They can also be sourced from Summit too.

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