Rough road clunk at low speed | 2009 G37x 125,000 miles

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Old Jun 7, 2018 | 05:41 PM
  #31  
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I think i have narrowed my clunk down to the brake caliper. When i go over bumps with brake slightly on = no clunk. I bought new caliper slide pins and caliper bushing. I will find out when i go to work if this solves the problem.
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Old Jun 7, 2018 | 06:57 PM
  #32  
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Originally Posted by guy from norcal
I think i have narrowed my clunk down to the brake caliper. When i go over bumps with brake slightly on = no clunk. I bought new caliper slide pins and caliper bushing. I will find out when i go to work if this solves the problem.
I mentioned earlier I have noise until I lightly apply the brakes and my calipers are both rattling. Interested in seeing how you resolve - getting ready to order new slide pins, hardware and caliper grease along with a good cleaning.

-Eric

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Old Jun 9, 2018 | 11:00 AM
  #33  
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Originally Posted by llebcire
I mentioned earlier I have noise until I lightly apply the brakes and my calipers are both rattling. Interested in seeing how you resolve - getting ready to order new slide pins, hardware and caliper grease along with a good cleaning.

-Eric

https://youtu.be/3Wgc3esHEsc

I would say you need new caliper bushing and slide pins. Both very cheap and easy to replace. The caliper bushing goes on the bottom pin.

As for me the clunk is still there.
I think next is looking at my motor mount.
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Old Jun 9, 2018 | 11:25 AM
  #34  
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Originally Posted by guy from norcal
I would say you need new caliper bushing and slide pins. Both very cheap and easy to replace. The caliper bushing goes on the bottom pin.

As for me the clunk is still there.
I think next is looking at my motor mount.
I don't believe there are bushings on the 2011 (non-sport/non-Brembo) AWD. The only pictures I can find are from the service manual but it seems like there's a slide pin in the torque member that I should replace along with the bolt that secures the cylinder body to the torque member, but I can't find a better image.

-Eric




Unless it's this image - thought these were single piston:


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Old Jun 9, 2018 | 11:38 AM
  #35  
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The bottom slide pin has a rubber boot that goes on the end of it. Pretty sure the X models have it too.
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Old Jun 9, 2018 | 12:18 PM
  #36  
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And i also snapped one of my wheel studs off.
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Old Jun 17, 2018 | 08:53 AM
  #37  
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Originally Posted by guy from norcal
I think i have narrowed my clunk down to the brake caliper. When i go over bumps with brake slightly on = no clunk. I bought new caliper slide pins and caliper bushing. I will find out when i go to work if this solves the problem.
Any updates?

-Eric
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Old Jun 17, 2018 | 09:13 AM
  #38  
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Do y'all have aftermarket sway bars?


I had a low speed clunk and it was the bushings. Over time they had oh-so-slightly hollowed out from friction.
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Old Jun 17, 2018 | 09:46 AM
  #39  
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Originally Posted by Lego_Maniac
Do y'all have aftermarket sway bars?


I had a low speed clunk and it was the bushings. Over time they had oh-so-slightly hollowed out from friction.
Lego_Maniac - look back at my previous post and you can see how bad both calipers rattle for me in the YouTube video and my noise goes away if I lightly touch the brakes. I have factory sway bars and have replaced the bushings and end links.

-Eric
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Old Jun 18, 2018 | 09:41 PM
  #40  
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I drove to work the other day with no sway bar. clunk is still there.
This may be a long shot,but i'm going to try and replace the passenger side motor mount. I read a few post about the G35 with motor mount clunk sound.
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Old Jun 22, 2018 | 12:15 PM
  #41  
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questions for those who have done the end link DIY: how long and how difficult is the job for an average joe using hand tools, no air?

i've done brakes, sway bar install and a host of other 'mod' type projects (i.e. the RJM clutch pedal), and the end links look straight forward. but i'm no pro nor do i have a lift. i've been getting a sort of clunking and a bothersome loose front end feeling over some bumps or driveway approaches. nothing feels loose when i do the winter tire changeover, but my guess is the end links are to blame. i'm at ~60k miles with Eibach sways.

another question - end link replacement does not impact alignment, correct?
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Old Jun 22, 2018 | 12:27 PM
  #42  
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End links are easy and don’t impact alignment - I made a video last fall and never got around to editing and posting.

Call outs:
Both wheels need to be off the ground
Use correct torque
With correct tools probably 1.5 hours - actually swapping components is 30/side, rest is tedious lifting car, removing wheels, etc.

-Eric
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Old Jun 22, 2018 | 02:44 PM
  #43  
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May need a breaker bar.
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Old Jun 22, 2018 | 03:30 PM
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^^ thanks guys. sounds well within my wheelhouse.
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Old Jun 22, 2018 | 06:52 PM
  #45  
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Is this normal


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