Notices
Series I Trouble Shooting This is the place to learn more about or discuss any issues you're having with your RX-8

Knocking sound coming from rear over bumps

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 01-24-2012, 09:42 AM
  #26  
Time for boost...
iTrader: (24)
 
RX8Soldier's Avatar
 
Join Date: Jun 2010
Location: Canada
Posts: 5,414
Likes: 0
Received 15 Likes on 14 Posts
If you replace suspension with OEM, it's best to do AT MINIMUM both fronts or both rears. I would do all four, but that's just me.

You may as well go aftermarket. They are usually better than stock, and much cheaper. Many members have used the brand in your link. Research them before diving in.

NOTE: If you consider going aftermarket, you should replace all four shocks!
Old 01-24-2012, 09:49 AM
  #27  
Registered Maniac
Thread Starter
 
Daveydave's Avatar
 
Join Date: Dec 2011
Location: Sterling, VA
Posts: 70
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RX8Soldier
If you replace suspension with OEM, it's best to do AT MINIMUM both fronts or both rears. I would do all four, but that's just me.

You may as well go aftermarket. They are usually better than stock, and much cheaper. Many members have used the brand in your link. Research them before diving in.

NOTE: If you consider going aftermarket, you should replace all four shocks!
Thanks RX8Soldier! I was thinking that may be the case. I'll start looking through the aftermarket forums to see what folks are liking. Wouldn't need something for racing or anything, but if I can do all 4 for about the price or less or 2 OEMs, I'll def got that route.

Dave
Old 01-24-2012, 12:10 PM
  #28  
Registered
iTrader: (5)
 
USAFPilot11's Avatar
 
Join Date: Nov 2010
Location: Collinsville, IL
Posts: 35
Likes: 0
Received 1 Like on 1 Post
Thank you as well, Angel. I am definitely going to try and fix this creaking noise, and with the help of that thread it will be much easier.
Old 03-05-2012, 03:58 PM
  #29  
Registered
 
JR RX8's Avatar
 
Join Date: Aug 2010
Location: New York City
Posts: 99
Received 21 Likes on 8 Posts
Did you ever find out what it is?? I have the very same problem and I can definitely say it comes from INSIDE the cabin. Sounds like something rubbing perhaps when I go over a bump or the body twists or torques. And I have had the experience that when it's cold I hear nothing but when it's warm I get the sound. Not quite a knock but somewhere between a ticking or squeak. Sounds most;y like wire hitting a body panel but i know it's not that, cuz i checked all inside as far as I could see. It drives me nuts. I thought it might be the windscreen as well. Look forward to hearing from you to see what it was. Thanks.
Old 03-05-2012, 07:47 PM
  #30  
Registered Maniac
Thread Starter
 
Daveydave's Avatar
 
Join Date: Dec 2011
Location: Sterling, VA
Posts: 70
Likes: 0
Received 0 Likes on 0 Posts
For me it was one of the struts being shot. Definitely a big knocking sound. Yours sounds different than what mine was.
Old 01-02-2013, 09:26 AM
  #31  
Registered User
 
amitsince1984's Avatar
 
Join Date: Jan 2013
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Hi Daveydave,

I have exactly same issues with my rear left .... Mechanic told me it may be the strut and sway bar links ... I got new Sway Bar links and a lil bit used strut with mount that had little bit miles on it.. Even after installation of these the sound is there

I knocks more on small bumps .. lesser on bigger ones and at time on sudden acceleration and breaks ...

However he did not charge me the installation fees but now he says it might be due to the upper left control arm ... can you help me here the sound irritates me ...
Old 01-02-2013, 10:12 AM
  #32  
Registered Maniac
Thread Starter
 
Daveydave's Avatar
 
Join Date: Dec 2011
Location: Sterling, VA
Posts: 70
Likes: 0
Received 0 Likes on 0 Posts
Mine turned out to be the left rear strut being shot. Once it was replaced the knocking was gone. Weird that both your strut and sway bar links were replaced and it's still there. You say the strut was used, I wonder if it still may be the culprit? Or is the sound exactly the same with no decrease now?
Old 01-03-2013, 09:05 AM
  #33  
Registered User
 
amitsince1984's Avatar
 
Join Date: Jan 2013
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Yeah ... its still the same .. he now says it might be the left upper control arm ... but doesn't wants to install it and then waive of the installation fee again if it that doesn't fixes it :P ....
Old 02-26-2014, 04:10 PM
  #34  
Doug
iTrader: (6)
 
twistedwankel's Avatar
 
Join Date: Nov 2010
Location: Spring Hill, FL
Posts: 161
Received 0 Likes on 0 Posts
Problem Solved for me.

The noise over small bumps like out of driveways and a minor pavement veriation was really irritating. I noticed when autocrossing under sharp corners also an occassional noise.

It got alot better when I changed tires. BUT it was still there.

I took the car back to Mazda to have them inspect all the bushings. They discovered that when they replaced my struts last month the tech didn't tighten the lower bolt on rear passenger side and it was backed almost all the way out. Ooops. Well it didn't hurt anything and the noise is completely gone now. At least the Service Manager was honest about it and of course no charge.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Billy Marcial
RX-8's For Sale/Wanted
5
03-01-2018 06:50 AM
ei8ht
RX-8 Discussion
4
08-21-2017 09:08 AM
Dokuji
Series I Trouble Shooting
8
11-01-2016 02:51 PM
WingleBeast
Series I Wheels, Tires, Brakes & Suspension
22
05-23-2016 09:22 PM
ironj221
Series I Trouble Shooting
2
07-16-2015 10:16 PM



You have already rated this thread Rating: Thread Rating: 1 votes, 5.00 average.

Quick Reply: Knocking sound coming from rear over bumps



All times are GMT -5. The time now is 01:20 PM.