Sound coming from the front end???

[GotSandH3]

It sounds like it might be a torsion bar problem. I work for MBZ and the ML's have the same problem. There is a plastic bushing that supports the torsion bar keys. When the plastic cracks, it makes the same type of noise. I dont know if GM torsions are built the same way but it might be something to look into.

[H3 Hummer]

Open the hood look at the firewall. There are some long skinny steel black tubes (I am not sure what they are for) they run the length of the firewall.

They are not far down almost at the top. These tubes are put in on little plastic cheesy mounts. They can easily pop out and luckily easily pop back in. Because of their location they sound horrible when you hit bumps (if loose). Check these out and make sure they are secure.

[marin8703]

Originally Posted by H3 Hummer

Open the hood look at the firewall. There are some long skinny steel black tubes (I am not sure what they are for) they run the length of the firewall.

They are not far down almost at the top. These tubes are put in on little plastic cheesy mounts. They can easily pop out and luckily easily pop back in. Because of their location they sound horrible when you hit bumps (if loose). Check these out and make sure they are secure.

those tubes are the brake lines. carefull with them! i had the little pipe pop out of one of its claps and was making a rattling noise, easy to pop back in, but be careful not to bent the line, its not strong.

[H3chicky]

I have the same noise but notice it more when it is very cold. I just had an H3 for a rental and it made the same noise.

Barb

[TexasRTR78]

Well, I have not been back to the dealership in Lubbock to have my little "problem" fixed yet ( I know, I know...PROCRASTINATOR). The sound and the popping/grinding is still there...I have noticed more now than before that it happens while turning in either direction and ONLY when I am taking a corner kinda fast and the body rolls/leans from the turn...so maybe this is a problem with the body mounts as someone mentioned above? Someone above mentioned that it sounds like metal bending then popping back...that is the best description of my problem.

ANYWAY, it is still driving me crazy!!!

MY plan is to take the trip to Lubbock next Friday...I hope they can figure it out this time (gunna print out the above mentioned ideas and take it with me for the service guy to read...hopefully he will FIX IT this time!

[kma]

I got mine back the other day from having this worked on. This dealer was not familiar with the problem, but my old dealer was. The old dealer said it was a body mount. This is what the dealer I took it to came up with. I still feel a little something but not on turns, and I didn' feel it in the 2007 loaner I had for the 10 days mine was in the shop(laundry list of things wrong)

Customer states pooping noise from underneath of vehicle when making sharp turns.
Cause: Tighten Loose Crossmember

[RubHer Yellow Ducky]

I hear a sound also. Pulled into my drive and left the engine running, popped the hood and discovered what the noise was...

RYD

[Hmmm2]

Originally Posted by kma

Customer states poopingnoise from underneath of vehicle when making sharp turns.
Cause: Tighten Loose Crossmember

Sorry KMA, I couldn't resist bringing your typo to the forefront.

I have the same noise up front when making a u-turn and turning the wheel sharp all the way to the left or right. The front wheels almost make a 'hop' until I straighten them out. It looks like many on the forum have a similar problem.