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Old 03-05-2017, 01:54 AM   #1
mr_squirrel
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Popping sound with TRD springs

2017 86. Just hit 700 miles today

I put on an Invidia N1 without any issues a week ago. Few days later, put on TRD springs with a buddy and the car was doing well. I started noticing a ping/pop noise when entering/exiting driveways, but I thought the springs were settling. A week after that, I still hear the noises. Sounds seemed to be coming from the back of the car.

Reread the Toyota directions and browsed another Google search result and realized it could be because I didn't lower the car before torquing the nuts on the control arm(?). Redid the nuts while the car was on the ground (this time with blue threadlocker because I also forgot that... =| ). Didn't seem to make a difference in the popping sound.

Checked it out with my dad who is an engineer with TMS, and he couldn't figure it out either. He thinks the exhaust is hitting something like the driveshaft or rear diff (he kinda distrusts aftermarket stuff).

Wondering if anyone else had this issue.
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Old 03-05-2017, 02:09 AM   #2
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Well no, but if I did, what I would try would be to position the car on the driveway about where it makes the sound, then have someone else rock it up and down while I laid underneath to try to hear and isolate the sound.


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Old 03-05-2017, 10:29 AM   #3
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Check your sway bar endlinks/nuts, make sure they are torqued to spec.
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Old 03-05-2017, 12:46 PM   #4
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Quote:
Originally Posted by mr_squirrel View Post
Checked it out with my dad who is an engineer with TMS, and he couldn't figure it out either. He thinks the exhaust is hitting something like the driveshaft or rear diff (he kinda distrusts aftermarket stuff).
This is worth looking at. Like the previous poster mentioned, try to get the car into a similar position as when you get noise and then grab the exhaust and move it.

And yes, this is VERY common with aftermarket exhaust systems. From my Miatas to M3s *EVERY* exhaust I've installed involved some sort of repositioning to keep it from hitting the diff carrier, drive axle, rear body outlet, etc.
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Old 03-05-2017, 01:24 PM   #5
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I have a similar issue, though I've had my springs on for quite some time now. Whenever I enter a driveway, or go over an uneven surface, I notice creaking from the rear of my car. I'm going to recheck all the bolts whenever I install my new catback this week.
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Old 03-05-2017, 09:19 PM   #6
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Loosened and tightened the end links on the rear sway. Still making the noises, and unfortunately, a little more frequently. Happening on semi-spirited corners, and when I backed into street parking spot (not a completely level street)

I'm wondering if I botched the job altogether. I tried pushing on the car body laterally to reproduce the sound, but I don't think I was able to load it enough.

Will attempt more fixes. Thanks for the suggestions!

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Old 03-05-2017, 09:49 PM   #7
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Check that all the spring end's are positioned or this could cause the spring to bind trying to compress. Also bump stops not put in properly could do this also.
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Old 03-07-2017, 01:10 AM   #8
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Check that all the spring end's are positioned or this could cause the spring to bind trying to compress. Also bump stops not put in properly could do this also.
Redid the springs with those extra 10mm and the sound is gone. I really need to read directions better.

Spring was up against the stop, rather than giving it distance. My fault for not understanding what 'binding' is. Love and learn.

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Old 03-07-2017, 04:01 PM   #9
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Redid the springs with those extra 10mm and the sound is gone. I really need to read directions better.

Spring was up against the stop, rather than giving it distance. My fault for not understanding what 'binding' is. Love and learn.

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Glad it helped out
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Old 03-07-2017, 04:08 PM   #10
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Quote:
Originally Posted by mr_squirrel View Post
Redid the springs with those extra 10mm and the sound is gone. I really need to read directions better.

Spring was up against the stop, rather than giving it distance. My fault for not understanding what 'binding' is. Love and learn.

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Don't feel bad you are at least the third person I have seen this happen too with these springs. Not sure if the instructions are clear enough on where they need to seat.
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