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Knocking coming from under the car

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Old 03-10-2018, 10:21 PM   #16  
Flakman
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Finally got a guy to look at the car. Could not find anything wrong with bearings or CV/halfshafts. Luckily he doesn't charge for road test and troubleshooting that doesn't require tearing anything apart. He says it doesn't seem like anything that is gonna cause problems, but now back to square one.
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Old 03-13-2018, 01:57 AM   #17  
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Okay, here's a video with audio of the clunk/knock. You'll have to turn up the volume, but you'll here the non-rhythmic clunking.


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Old 03-13-2018, 03:07 PM   #18  
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I got nothing. Sorry :/
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Old 03-13-2018, 05:51 PM   #19  
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I thought it kinda sounded like an unbalanced wheel...but really that's just a wild guess...Op can you identify where on the car the sound is coming from?...in the video its really not apparent...
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Old 03-14-2018, 12:52 AM   #20  
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It really aounds like the left front. I wish I could mount the phone outside the car. Will have to think about that.
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Old 03-14-2018, 08:31 AM   #21  
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Quote:
Originally Posted by Flakman View Post
It really aounds like the left front. I wish I could mount the phone outside the car. Will have to think about that.
in the off chance it is an unbalanced wheel, any sign that you lost a wheel weight on the left front tire? (i.e. clean spot where a weight used to be?)

could also be an endlink broken or swaybar bushing that needs grease causing the swaybar to clunk or bad tierod
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Old 05-21-2018, 08:09 AM   #22  
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Quote:
Originally Posted by Flakman View Post
It really aounds like the left front. I wish I could mount the phone outside the car. Will have to think about that.
Where you ever able to find out what it was making the knocking sound?
I just started hearing the same exact noise last night and it sounded like it was coming from the front pass. side of my car. I'm also hoping it something easy to moderately priced. But please let us know the outcome.

09 G37S coupe - 20" wheels
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Old 05-21-2018, 11:00 AM   #23  
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Sounds wheel-related to me. Are all the lug nuts tight?
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Old 06-05-2018, 08:16 PM   #24  
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I replaced both the front driver and passenger side bearings(went with Timken), and all is well. No sounds, no vibrations, no nothin. It's not difficult to do assuming you have the right tools and done it before. Got them both done in one evening taking my time with dinner and beer breaks! lol
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Old 06-05-2018, 08:29 PM   #25  
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By the way, I was only getting sounds from the driver side like you. You may or may not have a bad bearing like I did. If you do determine it is bad or just feel like replacing it to rule out the bearing, you don't necessarily have to replace both of them. However most would recommend it. Do you take turns and corners hard?
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