Hollow thunking sound - front right side 11' 3S hatch - 2004 to 2016 Mazda 3 Forum and Mazdaspeed 3 Forums
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post #1 of 14 (permalink) Old 03-15-2016, 06:35 AM Thread Starter
Carmagnut
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Hollow thunking sound - front right side 11' 3S hatch

2011 3S hatch. 123k stock suspension.

I searched 34 pages in this section before posting this.

The left side of the car absorbs bumps and impacts normally. There is a hollow thunking sound emanating from the right front side. There is a section of road by my house where each road undulation produces its own specific clunking noise. It just seems to crash and bang over bumps and potholes (which i obvioulsy try to avoid) It does not happen over every little bump but is very pronounced when it does. I commute to NYC daily which round trip is 120 to 150 miles. The roads in some spots are terrible. The suspension has never been altered. I haven't had the car aligned in a bit but it does track straight.

I'm looking to fix whatever issue it may be before major damage occurs. I have been hearing something for a while butit seems to be bothering me more lately and questioning the confidence of the front of the car in terms of handling.

I haven't gone nuts yet taking things apart but that is my next plan of attack after hopefully some suggestions as to what it could it be. Thanks in advance.

Last edited by Carmagnut; 03-15-2016 at 08:17 AM.
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post #2 of 14 (permalink) Old 03-15-2016, 08:22 AM
swiftmover
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It could be caused by the sway bar end links. Have it checked.
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post #3 of 14 (permalink) Old 03-20-2016, 01:35 PM Thread Starter
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I replaced the sway bar links on both sides. The right side was blown; grease was leaking out. The left seemed normal but we replaced it nonetheless. I still did hear some noises on the way home but I did not put enough time and mileage on it yet to see if it did the trick.
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post #4 of 14 (permalink) Old 03-22-2016, 06:04 AM Thread Starter
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260 miles later and a day and half worth of commutes and the noise is still there. Hollow thwak sound upon certain impacts, both big and small. Not sure what it could be.
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post #5 of 14 (permalink) Old 03-22-2016, 09:57 PM
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Check the strut piston nut. I had a thunking noise that seems similar to what you're describing and found it had loosened, causing the strut to bump up and down against the strut assembly cap. Tightened it up with some thread-lock and it's been quiet since!
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post #6 of 14 (permalink) Old 03-23-2016, 04:26 AM Thread Starter
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I will look into that. Thanks
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post #7 of 14 (permalink) Old 05-13-2016, 04:44 PM Thread Starter
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It has been awhile since I posted in this thread and I am glad to say that the clunking sound has disappeared since replacing the sway bar links.

Here is the next issue; the front end of the car seems floaty since the replacing of the links, so much so that even my girlfriend mentioned that the car felt different. The car just seems to....jump around when it hits bumps and the road imperfections. I can literally feel weird side to side movements under the front end of the car while driving. I take the same roads most days so I am used to how they felt (a few months ago) and how they feel since the install. I am no suspension guru; could it be the shocks, struts, bushings, etc. The car now has 127K on it but the rest of the car feels super tight still. Any advice or pointing in the right direction is appreciated. Thanks in advance.

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post #8 of 14 (permalink) Old 05-14-2016, 01:51 PM
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Loose *something* is the usual culprit... Have you ever messed with the front subframe bolts? If not, then check everything else you can find... strut shaft nut up top, strut clamp bolt, LCA ball joint, LCA pivots (3 bolts), tierod end (wire-captured nut), and finally wheel bearing. If everything's tight on both sides it'd be weird to get the feeling you describe.


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post #9 of 14 (permalink) Old 05-14-2016, 02:38 PM Thread Starter
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Thanks. I have never messed with anything under the front of the car. Could the increase in thickness of the MOOG piece (diameter wise) vs the OEM sway bar links have some to do with it? The MOOG piece and was noticeably thicker, could it be somehow transmitting more feeling to the steering wheel of what's going on underneath the car? Like Ifeel every move, divot, bump, rebound, etc. I know it sounds weird but I have had the car since day one. I know how the car used to feel.
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post #10 of 14 (permalink) Old 05-14-2016, 04:35 PM
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Your shocks may just be shot. Your mileage would make that a distinct possibility.
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