2007 Hyundai Sonata Gls Rattle Noise Back Side of Engine

06 Sonata - Rear Clunking Noise

Discussion in 'Hyundai Sonata' started by Zy, Feb 20, 2006.

1. This is driving me crazy. After hitting smaller bumps going no more than 40
   mph I hear what appears to be a recurring clunking/rattling noise almost as
   if the rear suspension isn't absorbing the impact (it is though). It's a
   definite rattle and related to hitting the bump. It's most pronounced in
   the passenger rear as I had a friend drive me around while I was in the
   trunk. I've heard some talk briefly about this, but no fixes have been
   offered or suggested. It's been to the dealer to no avail and I've even
   driven the same vehicle and the noise is present in that too. It's a GLS
   with V6 and 17" tires. Anyone else experiencing this too?

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2. It's probably the gas tank. Try again with a very full tank, and see if the
   noise is cured.

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3. sounds like a dealer service issue, with or without a full tank of gas is
   irrelevant. take it and have them look at it.

   also, how well do you trust you friend driving you in the trunk? that would
   concern me a lot more.

4. Yep, I have the problem too.

   It's not related to the fuel level... I tested that last night.

   As soon as the weather warms up a little in May, I will be climbing
   underneath the car and pushing, shoving, and tapping on things to find out
   what's loose back there. I bet a little neoprene foam could work wonders.

   If you listen for it, it will drive you nuts. Ignore it... if you can.

   PS: Did you test the internal trunk release? Hey, Jimmy Hoffa could be alive
   today if he would have had one.

5. This is driving me crazy. After hitting smaller bumps going no more than
   40 Yep, I have the problem too.

   It's not related to the fuel level... I tested that last night.

   As soon as the weather warms up a little in May, I will be climbing
   underneath the car and pushing, shoving, and tapping on things to find
   out
   what's loose back there. I bet a little neoprene foam could work wonders.

   If you listen for it, it will drive you nuts. Ignore it... if you can.
   

   PS: Did you test the internal trunk release? Hey, Jimmy Hoffa could be
   alive
   today if he would have had one.
   --
   Bob

   -------------------------------------------------

   Okay so here is the sccop,

   I bought a 2006 GLS V6 in October 2005 and last week I had a "come to
   Jesus meeting" with my dealer after my car has been in the shop 9 times
   since I bought it. I have had all the same issues as discussed here and
   more and here is the sccop.

   The Clunking Noise:

   A design flaw in the suspension system that Hyundai is aware of but no fix
   for it yet. It is possible to minimize the noise in some cases. Part of
   the noise may be coming from the jack and the styrofoam it is sitting in.
   Try removing it. Also the spare tire cover (Black plastic shheting) that
   covers your trunk has two plastic/metal clips that fit directly into two
   holes that are in the frame of the car body. Try insulating them with
   foam to prevent rattling. While these alone will not get rid of the
   clunking it may help minimize it.

   Two additional problems I have had:

   With a full tank of gas you will hear a rumbling noise for about 20-25
   miles after you fill up. This is the result of no baffles in the gas
   tank. Again Hyundai is aware of it but no fix yet.

   The last one is a high pitched whine that my car and others have developed
   at around the 60 to 70 MPH mark (2K RPM). After much fighting with my
   dealership and Hyundai they have finally admitted that this too is a
   design flaw dealing with the Variable Intake Manifold. When the air comes
   in it causes a high pitched whine. They know it and have not figured a fix
   for it.

   Hope all this information helps.

6. The clunking in the suspension is unfortunately a characteristic of the
   vehicle. The noise transmits too well from the suspension through the
   rear shock mounts and there is little insulation in the rear area of the
   vehicle. I have no idea whether Hyundai intends to address these issues
   with design revisions or whether such revisions can be made retroactive.

7. Wonder if poly urethane washers could be used to help isolate the noise
   transmitted through the shock mounts?

8. HT, is there any indication as to why only some vehicles experience this
   noise? A friend of mine recently picked up an '06 LX, and I hear this
   noise while in his car, but not in my '06 GLS V6.

   Eric

9. Thanks for the info. Good to hear that these issues have been reported
   to Hyundai Motor co...My 2006 Sonata GLS V6, 1500 miles, has the first
   two...clunking rear and rumbling gas tank when full. Please post any
   solutions you have found...

   Thanks,
   Seppo

10. 1 thing is for sure, we haven't heard the last of this one. The natives are
    getting restless...

11. Doubtful that it's just a "noisy" suspension. I got a chance to ride in the
    trunk and it's only from the passenger side, not the driver's. The noise
    isn't a clunk and then it's over. It's goes on for a couple seconds
    sounding as if something is loose. I highly suspect the exhaust system, but
    haven't given it enough look-see yet. Perhaps the rubber isolators in the
    hangars are to blame. Let me know if anyone else has any ideas.

12. It sounds like you may have an actual problem then, Zy. If that's the
    case, the dealer should be willing to investigate until they determine the
    cause and repair it. I've seen a couple with itching noises, but never an
    actual abnormal clunk noise. I did have one car, however, where the
    customer was complaining of an inaccurate fuel gauge and found the fuel
    pump module broken off the mounting plate in the top of the tank, leaving
    the module loose enough to bounce around the tank.

13. A coworker investigated the suspension noise on one car (V6, unsure of trim
    level). He found it to be coming from both rear strut tower areas. And it
    sounded like shock noise. Everything was tight. He also drove another car
    with the same package and it sounded the same.

    In fact, I thought the noise was present in all. But it's possible the
    suspensions are different in some models, causing the noise to not be
    present in all of them.

14. It is entirely possible that the sound is present in my car also. I just
    have never noticed it. And I am usually sensitive to that kind of noise
    too. I will listen for it further and see if I can reproduce it.

    Eric

15. You guys have my sympathy, because noises like that can be a real nightmare
    to fix.

    Let's HOPE it's the shocks themselves. That would be the most painless
    remedy for Hyundai, the dealers, and the customers. <fingers crossed!>

    Even if the shocks aren't defective, perhaps another shock profile can heel
    in the noise. That could also possibly fix that little "floaty" feeling you
    get on smooth roads at cruising speeds.

16. [original post is likely clipped to save bandwidth]
    That type of issue was exactly what I suspected with my 06 sonata.

    It does not sound like an unusual noise or noise level to me! Rather, the
    vehicle is so quiet in all other respects it really stands out. On many
    cars, the same noise would be masked by others.

    Given that, if the intent was to make a very quiet car, it is a defect in
    design. Sure hope they can fix it.

    gerry

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2007 Hyundai Sonata Gls Rattle Noise Back Side of Engine

Source: https://www.thehyundaiforums.com/threads/06-sonata-rear-clunking-noise.3022/

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