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Thread: banging noise from rear

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    confused banging noise from rear

    Hello all,

    Need a urgent help from you...

    Just from last day or two, the car is making a banging sort of noise from rear each time the car body moves a bit. It is not necessarily on uneven roads but also on smooth road which may twist a bit either side. The noise is like a heavy lose cable hitting the underneath of the body at the rear.

    Now I have been earlier getting the thumping sound from rear which I believe is to do with rear ARB bushes and/or UCA - these are meant to be dealt with shortly.

    But this new noise has just started coming from last 2 days.. think after i had a couple of people sat in the back one day. I am getting worried to carry on driving like this in case I make it worse.

    Any idea what can this be?

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    Brake pads? Mine sounded like banging when I changed the pads for non GM ones...

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    Thanks but it cannot be brake pads. They are fairly new and genunine GM ones.

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    Anyone??

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    Regular Member murf2484's Avatar
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    have a look at all your spring see if any have snapped mine did on the rear o/s made a clunking sound

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    Is it the prostitute in your boot?

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    Right the noise still very much there.. had it while driving to work in the morning and coming back.. all sorts of surfaces.

    On close observation, what I have noticed is that the noise comes when the front of the car moves a bit up or down (more down) due to road moving like that or due to a speed bump. It is quite easy to reproduce on speed bumps. Mostly seems to be coming from the rear of the car but on occasions seems to be coming from front right.

    I have tried looking under the car for anything obvious or lose but nothing obvious. Tried moving the exhausts by hand and not much movement. Tried pushing the rear end up and down, moves smooth and no noise. Tried pushing the front up and down - interesting the front right moves ok but front left doesn't seem to move at all when pushed down. Is this ok? Can this be related? Can it be a front shock or maybe spring?

    The noise is like a lose cable banging on the bottom of the car each time the front moves up or down.

    This was definitely not there a couple of days ago and driving me mad now. What can suddenly cause this? I am worried that continue driving like this might cause some major damage.

    Checked the rear springs from back of the car - can't see fully but nothing obvious. Checked the front springs from space between the wheel arch and wheel - looked ok. Is there any other way to check the springs are part broken or causing this?

    Need your help guys....

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    take each wheel off so you can check each individual spring i had the same issue a few months ago i missed to broken springs, clunking sound i didnt inspect them enough over looked this and the garage spotted them when i took it in for the noise, so all i can help with is give them a really good check hope you get it sorted mate

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    Quote Originally Posted by Yugguy View Post
    Is it the prostitute in your boot?
    Haha, think it might be his missus!

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    Right guys... here's the update...

    Got the RAC guy to have a quick look first as the knocking was really bad when I drove to work yesterday morning. He suspected the springs so checked all the spring, bushes, etc. The only thing he could find was the rear left spring had the bottom coil a bit flat and the one just above it might be touching slightly when the car moves. But there was no breaks, cracks, etc.

    So took the car to a local garage this morning. Was able to reproduce the noise easily going over speed bumps (noise comes from rear like a bang when car is coming down from speed bump). The guy put the car on the ramp and checked everything. Nothing obvious at all. All cables, etc proper as expected, nothing lose anywhere.

    The guy checked the springs and said they look ok. Even checked the rear left one carefully and said its ok. He then checked all the bushes both front and rear with a crowbar and found them to be ok.

    I had a close look with him as well and couldn't spot anything at all which could make such an obvious banging noise. So the guy said to bring it back if/when it gets worse.

    Bottom line... noise is still there and very apparent. its like something like metal is being banged at the rear end of the car from bottom.

    What to do? Any suggestions?

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