Similar noise in my car, thoughts?
01-13-2012, 06:30 AM
#26
Also a thought... Try placing your hand on various suspension components while the pop happens. Maybe you will feel it and have a better idea of where to look. Where in ct are you? Maybe you can stop by my shop and we can throw it up on the lift real quick. Im in Old Saybrook.
The swaybar movement is normal. That is a huge bar; 1.25" OD x 0.25" wall, so it generates a lot of force. The only way to control it further is with metal bushings rather than poly.
As far as the noise, if you can't isolate that I'm thinking you must be deaf or something ...
As far as the noise, if you can't isolate that I'm thinking you must be deaf or something ...
And yeah, you got a big Sway Bar there...could, I say 'could' the movement/strength of such a heavy/strong/stiff S Bar be problematic?
That is 'creating your noise issue', is the other side of the car loaded (on the ground or up in the air) when you jack off! (sorry had to say it).
That is 'creating your noise issue', is the other side of the car loaded (on the ground or up in the air) when you jack off! (sorry had to say it).
Look you may not think so, but Mazda really have engineered these cars pretty precisely, additional weight/force/tension or pre-load just might be creating your problem.
I checked out the Lower Control Arms on the S2 (new and specific for the S2), against the NC MX-5's which are identical apart from heavier alloy (Metal) at each of the bushed wrist joints and very slightly thicker arms, only by a few millimeter, but when you pick them up and compare there is a noticeable difference in weight, the S2's are heavier....that is my engineering tolerances point of view!
Again, 'could' the S Bar cause the Lower Arm and or it's Ball Joint to knock or twist slightly, or the LCA rubberized wrist bushes and metal sleeve and bolt to cross member move slightly?
I checked out the Lower Control Arms on the S2 (new and specific for the S2), against the NC MX-5's which are identical apart from heavier alloy (Metal) at each of the bushed wrist joints and very slightly thicker arms, only by a few millimeter, but when you pick them up and compare there is a noticeable difference in weight, the S2's are heavier....that is my engineering tolerances point of view!
Again, 'could' the S Bar cause the Lower Arm and or it's Ball Joint to knock or twist slightly, or the LCA rubberized wrist bushes and metal sleeve and bolt to cross member move slightly?
Also I am not sure if it is apparant from the video's but I tried to record right near the LCA's to see if the noise was coming from there / if i could see movement, and as crazy as this sounds, it almost sounds like the noise is somewhere towards the center between the motor mount and the cat. At the moment that is the best guess isolation that I have.
Last edited by paimon.soror; 01-13-2012 at 06:36 AM.
01-13-2012, 06:46 AM
#27
the first thing I would do is put a wrench on any and every bolt I could lay my eyes on
I had a knocking noise that drove me nuts for a while, sounded like the RF suspension, but eventually figured out it was loose bolts on the RH side of the the brace that is bolted across the rear of the front subframe
you might try putting the front up on jackstands with both wheels off the ground and then jack up one side, it will allow you to get under the car and try to locate it better *if* it will still make the noise with the car lifted
.
I had a knocking noise that drove me nuts for a while, sounded like the RF suspension, but eventually figured out it was loose bolts on the RH side of the the brace that is bolted across the rear of the front subframe
you might try putting the front up on jackstands with both wheels off the ground and then jack up one side, it will allow you to get under the car and try to locate it better *if* it will still make the noise with the car lifted
.
Last edited by TeamRX8; 01-13-2012 at 06:49 AM.
01-13-2012, 11:39 AM
#29
So I have been thinking about this all day at work, and in my idle time been listening to the youtube vids i took. ASH said something that kinda hit home that I will have to thoroughly check when I get the car up, and that is the LCA/UCA bushings. I have said that I heard the noise coming close to the middle of the car, right behind the motor mount... our LCA vertical bolt is there. Now the car is only 2 yrs old, 12500mi on it, but because I am lowered, what are the odds that i put some extra strain on the bushing there?
I did check the torque of that bolt, and it is up to spec (100ftlb) ... but that doesn't mean that the bushing is shredded up on the inside.
The only thing that has me saying that it might not be that is there is no feedback in the steering when i am hearing the noise ... I would assume that any non-rotational movement of the CA's would change the camber/caster of the wheel right?
I will have to lift up the car and disconnect the endlinks to get some good play on the control arms, but till then I am so distracted from my work lol.
I did check the torque of that bolt, and it is up to spec (100ftlb) ... but that doesn't mean that the bushing is shredded up on the inside.
The only thing that has me saying that it might not be that is there is no feedback in the steering when i am hearing the noise ... I would assume that any non-rotational movement of the CA's would change the camber/caster of the wheel right?
I will have to lift up the car and disconnect the endlinks to get some good play on the control arms, but till then I am so distracted from my work lol.
01-13-2012, 03:03 PM
#30
I think you are off base on the control arm bushings, they would only make that kind of noise if the mouting bolt wasn't tight enough and the inner metal bushing sleeve the bolt passes through was moving within it's clearance play and slapping against the bolt as the control arm moved
01-13-2012, 05:04 PM
#31
Well... i am pretty embarassed and frankly hate myself right now. So after looking at random bolts i decided to look at the torque specs of the sump guard. Low and behold i was way off the 20ftlb spec. After meeting the spec and driving the car......sound seems to be gone. I am at dinner now and will know for sure when i pull into my driveway.
Pretty ticked off at myself.
Pretty ticked off at myself.
01-13-2012, 06:29 PM
#33
Super Moderator
Your kidding Paimon....the S2 alloy Sump Guard!!??..gee I just tighten up mine until they are firm...yours must have been pretty sloppy, 7 bolts for memory.
Trying to get my head around the Guard moving enough to make that noise when jacking up, I guess it could flex that much?, ....but then I though "steering" was a thought of the noise?
Good to see it is fixed.
Trying to get my head around the Guard moving enough to make that noise when jacking up, I guess it could flex that much?, ....but then I though "steering" was a thought of the noise?
Good to see it is fixed.
01-13-2012, 06:57 PM
#34
Well i just got home, and every spot the car made a noise now no longer is an issue .... i can't wrap my head around that either, must have been the flexing caused by the guard across the bolts? I really dont know... all i know is that i am excited it is fixed, and ashamed at my noobness.
01-14-2012, 06:14 PM
#36
Super Moderator
/\ Agree...it is all there for a reason, perhaps more than one, or two on this occasion...it would want to be at around $335...
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