Wheel Hub and Bearing
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1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Wheel Hub and Bearing in Past Cadillac Vehicle Discussion; Hey guys, I'm going to replace the hub/bearing on my 98 Concours as a result of a slight howl during ...
  1. #1
    Goldencletus is offline Cadillac Owners Fanatic
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    Wheel Hub and Bearing

    Hey guys, I'm going to replace the hub/bearing on my 98 Concours as a result of a slight howl during left turns and a gentle pulse under braking that new rotors and pads didn't cure. The previous owner had hit something on the right side as evidenced by a large scrape on the under carriage of the car. I'm thinking perhaps the hub is slightly bent. My question is this, on rockauto.com there's plenty of selections for this part and they refer to "with or without" heavy duty brakes, I'm fairly sure that I don't have heavy duty brakes, but how can I tell for sure before ordering this part? Any insight is greatly appreciated. Thanks.

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    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Only commercial chassis cars have "heavy duty" brakes. Your Concours does not.

    Stick with AC Delco or Timken for hub assemblies

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    Thanks!

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    Re: Wheel Hub and Bearing

    I'm thinking perhaps the hub is slightly bent.
    That would be close to impossible.

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    Any ideas on what would cause the pulsing then? I have new rotors and pads, front and rear.

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    Re: Wheel Hub and Bearing

    If it's only pulsing under braking rotors/pads poss sticky caliper slides.
    Checking for bent hub would be fairly easy using dial indicator. You would have a wobble/shimmy all the time I would think though.

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    Thanks, I did grease those when I changed the rotors and pads, but will do them again as I need to take the calipers off again to replace the hub. It may not be bent, but it is starting to growl in left turns so I'm going to replace it anyway, plus I've already ordered the part! Does anyone think that the rotors should be turned even when new? A mechanic friend of mine says he does it on every rotor he installs.

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    MoistCabbage's Avatar
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    Unless you bought some really cheap Chinese rotors, they'll have been made to very tight tolerances. No need to turn them. Contamination or excessive pad material buildup could cause the shimmy when braking.

    You're planning on replacing the right side hub, correct?

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    That is correct. With AC Delco 2017, I hope it's the right one!

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    Re: Wheel Hub and Bearing

    Yea, a growling hub means the bearing is bad. If it growls louder on a left turn and quiets down on a left turn, it the right bearing. would not expect it to cause a pulsation, but stranger things have happened.

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    Re: Wheel Hub and Bearing

    I'm going to do it Saturday, I'll let you know if the pulsation is cured!

    "Unless you bought some really cheap Chinese rotors, they'll have been made to very tight tolerances. No need to turn them. Contamination or excessive pad material buildup could cause the shimmy when braking."

    They weren't cheap, but they might be Chinese, I got them from O'Reilly's

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    Re: Wheel Hub and Bearing

    There is no such thing as a U.S. made rotor anymore. That said, made in China is what made in Japan used to be................................junk.

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    Unfortunately my hub/bearing part didn't come in until last Monday so I'm going to change it this Saturday. I opened up the box and looked at the assembly and noticed a bag with three bolts in it, the sticker on the bag says "THE THREE HUB MOUNTING BOLTS ARE TO BE REPLACED BY PART NUMBER #18022052 AND TORQUED TO 130N-M". All of this makes sense except for on the bottom of the sticker says that these bolts are "PART NO. 4670600-405". Did this kit come with the wrong bolts? I don't really want to get the car dismantled and then find I can't put it back together, has anyone had this experience?

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    Goldencletus is offline Cadillac Owners Fanatic
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    Re: Wheel Hub and Bearing

    Been a while since I've posted, I said I would let everyone know about the braking vibration after replacing the bearing. The braking vibration was due to crappy "new rotors". Fortunately, I kept the OEM rotors and was able to turn them and voila, no mas vibration. Now on to the "growling" noise when turning left, replaced the hub/bearing assembly on the passenger side and the noise is no better. My thought is to replace the drivers side as well and see what happens, any thoughts guys? BTW, the longer I have the car and the more I drive it, the more committed I am to keeping "Cletus" for the long haul. It's fast, comfortable and really good on gas mileage for a large vehicle.

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    Re: Wheel Hub and Bearing

    A louder growl when turning left usually point to the right bearing, but stranger things have happened.

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