Front End Clunk Noise Recording
Frustrated about the replacement of struts, mounts, bumpers, sway bar end links and bushing being replaced and now I actually have more noise. Some have referred to it as a popping noise http://www.camaro5.com/forums/showthread.php?t=49036 and there are other noises some are complaining about that i don't think are the same. So I recorded it best I can, hope this is useful to see if there's a commonality and we can get together potentially for a joint approach to GM on this issue. My dealer has tried their best, but I'm starting to think it's a parts issue.
See attachment for the sound - is it what you hear? http://www.mediafire.com/?s94853d359d3kg5 |
That tink?
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I had a shop disconnect the front sway bar end links and secure the bar. I went for a drive and it was quiet again. So dealer replaced end links and sway bar bushing and gave it back to me. Noise was back. I told them thanks for trying, and they gave it one more shot by replacing the struts, mounts and bumpers. Was quiet for about 50 miles and now, about 300 miles later, it's REALLY bad. Makes the noise on highway joints and such. This weekend I'm going to check fasteners all around, again. Also going to disconnect end links, again. I'm curious if it's just the sway bar. There is one oddity - when it goes to the dealer and they put it on the lift, it appears that the noise is substantially reduced for the drive home. Next day, it's back. Unsure if it's some exotic thing with the strut innards, spring positioning/settling... WHO KNOWS! If it does not do it in the convertible, perhaps the strut brace helps here. I'm willing to try, but tempted just to trade on a 2013 and pick up MyLink, quad exhaust, etc. Thing is, if the new one makes this noise I will be bumm'n. BUT, then I would be willing to take her to Pedders! |
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Ok, try this version, filtered a little more. Again, it's mostly in the low frequency. I am going to try to capture it again tomorrow, including putting the recorder on the a-arm and sway bar.
What you're listening to is me driving 30mph over some evenly spaced cracks in a local road. |
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Hey Blackswan, for some reason I can't get your .zip file to work on my pc. But without hearing it myself, have you looked into the anti-lock brakes? When the car first takes off, the anti-lock brakes perform a self-test which is heard as a "clunking" sound that comes from under the car. Sometimes you can even feel the brake pedal move very slightly at the same time the clunk happens. It's only supposed to do this once, but I will occasionally hear mine twice. From what I can tell from what you've written, it seems like it's more of a repetitious thing instead of a once or twice kind of thing with yours, but maybe the anti-lock brakes are performing that test multiple times and are malfunctioning. I could be, am probably am, way off base with this, but I figured it's at least worth throwing out there. Maybe have your dealer check that out next time around.
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Noises are such a bummer to diagnose/describe and/or fix. For instance, I mentioned to Chevy customer service that I can reproduce it easily by going over a rumble strip. They look up "rumble strip" and come up with a TSB about the torque converter and note my records. The noise has been duplicated by dealer, they know exactly what I'm talking about, yet a proper fix alludes us. They have been trying, I can't imagine what else could be replaced/tightened at this point other than control arms, tie rod and steering rack. I doubt they'll do much more at this point. |
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