Pop and Whine From Frontend- WB? | FerrariChat

Pop and Whine From Frontend- WB?

Discussion in '348/355' started by whyte, Mar 26, 2008.

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  1. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    In the past seven days I noticed an occasional whine in the (seeming) front end, only when turning at low speed. First guess was wheel bearings might be singing.

    Today I also noticed a "pop" when turning hard right at low speed. The pop is something in the suspension/wheel, and feels very much like I just ran over an acorn or a rock. If I swerve right and left, it will reliably make the pop on each right turn, but never on a left.

    I read in the tech section about the parking brake adjustment, and I will check into that also, but I just wanted to pick the brotherhood's brain until I can jack the car up this weekend, pull the wheels, and see what's doing.

    Any guesses?
     
  2. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,224
    Mount Isa, Australia
    Full Name:
    Pap
    Very hard to pick a noise/s like that without hearing it, of course!! :):)

    I am going to throw these out there for you to check mate....

    Worn ball joints?
    Worn tie-rod end?
    Steering rack bolts loose?
    Steering rack-end worn?
    Worn upper and lower control arm bushes?
    Worn strut mount bushes?
    Loose strut mount bolts?
    Worn sway bar bushes?
    Loose sway bar bolts?

    I am sure you know how to check for a noisey wheel bearing. :):)
     
  3. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    Nice list Pap.

    Yeah, I'm sure I'll end up tearing half the front end off looking for it. I suppose its been 2 years since the major and its due for a once-over.

    If anyone thinks of anything else I should take a peep at, let me know. It does feel like a bushing somewhere.

    Thanks.
     
  4. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
    8,329
    Palos Verdes
    Full Name:
    Vince V
    I would definitely look at the list above. It sounds like suspension/sway bar issues. It could be something so simple as tightening a sway bar link. I would check the bolts for tightness. Assuming the sway bar is fine, then next would be the bushings. Great list, BTW PAP. :D
     
  5. Saint Bastage

    Saint Bastage F1 Rookie

    Jun 1, 2007
    2,548
    Connecticut
    Full Name:
    Lane
    You specifically used the term "whine". That suggests something that would cause rotational friction. (like misaligned brake rotor from its caliper) That generally increases the risk of this being something bad. Then again, could be a poorly mounted caliper.

    Stop driving till you figure this out.
     
  6. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
    Full Name:
    Jeff B.
    Goodness, Pap - after your own experience, how could you leave this off your list:

    CHECK THE TORQUE ON YOUR WHEEL LUG BOLTS!

    I would also suggest that you should make at least a quick visual inspection of the rubber CV joint boots to make sure none of them are torn open and have lost the grease from the axle joints. You should also check for any signs that the bolts that hold the joints onto the stub axles (inner and outer) are loose.
     
  7. No Doubt

    No Doubt Seven Time F1 World Champ

    May 21, 2005
    72,740
    Vegas+Alabama
    Full Name:
    Mr. Sideways
    All good ideas above. But if it was me, I'd first squirt some Liquid Wrench penetrating oil all over the front springs, especially at the base in case one or both springs has/have rusted into its setting. Turn the wheels all the way left, then right. Wait a few hours and then see if the sound is still as loud. It could be a very simple fix.

    Go easy on the actual driving at first, though. If the problem is elsewhere and some component snaps then you could have an immediate driveability problem!

    Also, since the sound occurs when you are turning, I would suspect a bushing in a tie rod is shot...allowing the ball joint to shift, or "pop". Do you feel any sensation through the steering wheel when you hear the "pop?" A slight jerk in the wheel hints strongly at that, but if you just feel the pop through the floor then the problem might be elsewhere (like in the shocks).
     
  8. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,224
    Mount Isa, Australia
    Full Name:
    Pap
    Whoops. :eek::eek:

    When my LHR bolts came loose, it all happened VERY quickly over 50 metres of road, slowing down for a corner, doing less than 20 km/h and it was more of a LOUD knock than a pop and whine. :p:p

    But you never know hey? Check those wheel bolts first Whyte. :):)
     
  9. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    All great ideas, forever preserved for future thread searches!

    I typically do a preflight before I take the car out and a spot check on lugs in on the list. I am PSYCHOTIC about checking my lugs and my tires, since I've already had 2 flats in the past year. Lugs are good and tight.

    For the record, the whine is not continual, and only seems to occur when there is an uneven weight bias during a turn at low speeds. For example, turning and accelerating away from a stop sign in a parking lot, I will hear it sometimes. Driving at any speed over 5 mph and there is zero noise. Swerving makes the "pop" but no whine.

    Could be brakes rubbing I suppose.

    In any case, rest assured it is grounded until the weekend comes and I can check it out thoroughly. I'll be checking every item on the list and reporting back with findings.
     
  10. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    I believe it is transmitted through the steering. Reminded me of a Pittman arm issue on an old car I had. Come to think of it, there is also a noticable shimmy in the steering when the car is cold. I chalked that up to wheel balance, or the suspension being cold (since it seems to fade after a few minutes driving), but it may be something worn out on the front end causing one of the wheels to wiggle a bit.
     
  11. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,224
    Mount Isa, Australia
    Full Name:
    Pap

    KA-BOOM!! :D:D

    Something is worn there in the front end buddy. :):)
     
  12. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    Well, here is good news.

    After pulling the wheels and checking out all the bushings and seals, everything looks good. The seals are certainly showing their age, but nothing looked horrible.

    I lubricated what I could, inspected the discs and brakes (looked fine) and then put it all back together.

    The whine, turns out, is brake drag at low speeds. I was able to replicate it with the wheels up. I wiped down both discs with solvent (to get any of that pesky tire shine crap off of them) and they seem much better now. Wheel spin was smooth, so I'm not worrying about bearings.

    Now for the embarrassing part. The "pop."

    Second test lap around the neighborhood, the skies parted, angels sang and it dawned upon me that there MIGHT BE SOMETHING ROLLING AROUND IN MY TRUNK! Sure enough, the authentic 1991 can of Ferrari Fix-a-flat had loosed it bonds and was happily bouncing about in my boot.

    So here's one to remind all of you that not every issue is $1,000. Sometimes they just cost a little pride. ;)
     
  13. Saint Bastage

    Saint Bastage F1 Rookie

    Jun 1, 2007
    2,548
    Connecticut
    Full Name:
    Lane
    but that pride...damn, thats expensive. Lets see, a new nickname for you.....ummmm
     
  14. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,224
    Mount Isa, Australia
    Full Name:
    Pap


    All I can say is this John.........:eek::eek:
     

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