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Old 09-24-2012, 06:43 PM   #1 (permalink)
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Default Clunking and rattling noise under acceleration right side front end.

This problem started about 2 weeks ago and has gotten significantly worse. Every time I accelerate really fast and let off the gas there's a clunking noise on the right side front end. I even hear it when I start up the car sometimes. When I accelerate and let of really quickly it almost sounds like something is rocking back and forth. Is it the axle? Thanks.
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Old 09-24-2012, 09:58 PM   #2 (permalink)
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Why not just get down there and check it out? Also look for grease around the cv boots when you're down there. CV joints on their way out can cause Noise/vibration on accel AND decel.

As far as the noise you're hearing during start up, it could be a different issue, for example, it could be a motor mount. Have a friend listen and try to pinpoint where the noise is coming from while you start the car.
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Old 09-24-2012, 10:36 PM   #3 (permalink)
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Default typical culprits

The clunk is usually the ball joint getting worn, needing grease or is just shot. Second front end culprit (round up the usual suspects!) is the front c-arms. The OEM rubber deteriorates and the long arm can clunk due to the bushing material disintegrating.

CV joints failing will make a rapid clicking sound during acceleration at any steering angle.

Then move on to struts, end link bushings, motor mounts.........
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Old 09-25-2012, 02:04 PM   #4 (permalink)
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Ive had this before, and it could be a worn upper strut mount. Turn the wheel from lock to lock a few times. Do you get any noise? Rust can make those stick and free up. Thus your " clicking sound ". - Dave
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Old 09-25-2012, 06:27 PM   #5 (permalink)
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I went under there to look today and saw a bit of grease buildup. I don't think it's the CV joints b/c there's no clicking. Motor mounts seem to be ok. Taking it in to the stealership. Thanks for the advice.
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Old 09-25-2012, 09:47 PM   #6 (permalink)
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Most likely its the lower control arm bushings or ball joints. You can buy replacement control arms made by Moog for about $120 each and they'll come with new OE style rubber bushings and ball joints. Then you can rebuild your factory arms with urethane bushings and new ball joints to keep as spares.

I had the same issue recently, however it turned out to be a broken upper motor mount bolt. Best I can tell is that it broke sometime between doing my timing belt (the last time my upper mount was removed) and when I replaced the rack and pinion. I got lucky though, as I had about 1/4" of bolt sticking out of the mounting plate on the engine block, so replacing it was easy.

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Old 09-25-2012, 10:19 PM   #7 (permalink)
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I'm having the same problem. Just recently replaced lower motor mount and urethathe bushings on LCA's. Loud clunking noise when only turning right.. Everything looks fine from under neath..
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Old 09-26-2012, 12:11 AM   #8 (permalink)
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Could be the motor mount

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Old 09-29-2012, 12:02 AM   #9 (permalink)
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It actually ended up being the lower motor mount.
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