06 Sonata - Rear Clunking Noise

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

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.

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.

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.

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.

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

"hyundaitech" wrote in news: snipped-for-privacy@localhost.talkaboutautos.com:

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

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

wolfcub27540 wrote:

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

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.

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.

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.

"hyundaitech" wrote in news: snipped-for-privacy@localhost.talkaboutautos.com:

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

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.

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.

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

replying to Zy, fred roberts wrote: i have a 2009 sonata low kms top car can not find the rattle in boot area. have stripped back seat and boot, still rattles after hitting a small bump,this car must be sold. fred

My 2010 NF Sonata had the same thing. Dealer found nothing over 3-4 visits. Eventually fixed it myself. The rear roll bar had the usual little drop rods at the ends to suspension but was supported by two brackets on suspension "chassis" . The roll bar was banging back and forth between those two brackets. Just loosened brackets (15 mm socket from memory) and moved them so that there was less play. Was some time ago but inwards seems to ring a bell. May or may not be the same on your car.

replying to Zy, fred roberts wrote: i have a 2009 sonata low kms top car can not find the rattle in boot area. have stripped back seat and boot, still rattles after hitting a small bump,this car must be sold. fred